Urban Resilience for Urban Sustainability: Concepts, Dimensions, and Perspectives

Urbanization is a continuous process for a city’s economic development. Though rapid urbanization provides a huge employment opportunity for people, urban threats also increase proportionately due to natural and man-made hazards. Understanding urban resilience and sustainability is an urgent matter to face hazards in the rapidly urbanized world. Therefore, this study aims to clarify the concept and develop key indications of urban resilience and sustainability from the existing literature. A systematic literature review guided by PRISMA has been conducted using literature from 1 January 2001 to 30 November 2021. It argues that sustainability and resilience are interrelated paradigms that emphasize a system’s capacity to move toward desirable development paths. Resilience and sustainability are fundamentally concerned with preserving societal health and well-being within the context of a broader framework of environmental change. There are significant differences in their emphasis and time scales, particularly in the context of urbanization. This study has identified key indicators of urban resilience under three major components like adaptive capacity (education, health, food, and water), absorptive capacity (community support, urban green space, protective infrastructure, access to transport), and transformative capacity (communication technology, collaboration of multi-stakeholders, emergency services of government, community-oriented urban planning). This study also identified several indicators under major dimensions (social, economic, and environmental) of urban sustainability. The findings will be fruitful in understanding the dynamics of urban vulnerability and resilience and its measurement and management strategy from developed indicators.


Introduction
In the last few years, the rapid rate of urbanization has resulted in a massive rise in urban populations, infrastructure, and urban settings [1]. An urban area comprises citizen, settlements, and a built-environment [1]. More than 70% of the global population will live in cities by 2050, requiring trillions of dollars to update and improve infrastructure within a short period [1]. As a result of these changes, people become more vulnerable to climate variability and the costs of environmental damage. Climate change, which includes an increase in global temperature and the magnitude of extreme weather events, affects human populations and stresses the built environment [2]. Most recent climatic models predict that climate change will produce a diverse global impact, with the effects being more extreme in urban areas [3]. This is attributed to the increasing density of human beings, construction materials, and land-use patterns in the urban environment [4]. It is critical to understand how urban forms alter the climate locally and how climatic variability nations, better health, or failure of state institutions. The triple bottom line, defined by Mori and Christodoulou [23] as a precise concept of biophysical, economic, and social components and intergenerational equity, are major concepts of sustainability. Sustainable development is a broader orientation for assessing and restructuring policies to improve urban management, not a precise description.
Resilience represents a system's ability to 'bounce back' or return to a previous stable condition after stressors caused by any hazard [24]. Resilience is also characterized as the urban community's ability to recover from the risks of hazards. Resilience is a city's or community's capacity to adjust, adapt, and, most importantly, changes in response to various internal and external hazards [25]. The urban community should have the capability of resilience thinking to help resolve environmental risks in the light of global environmental change. Many plans, programs, and initiatives have been undertaken in many cities to integrate sustainability into urban planning activities [26]. The resilience plan is advanced in urban management in many developed and developing nations. The Sustainable Development Goals (SDGs) specifically mention that cities should be 'inclusive, clean, resilient, and sustainable (SDG 11)'. Urban management is a critical element of global efforts to address disaster risk and adverse effects of climate change. New urban policies should focus on the concept of resilience [27]. Considering its importance, resilience has evolved into a discursive space to reflect the city and specific visions for its future.
Understanding the idea of urban resilience necessitates familiarity with the evolution of resilience theory [28]. Even though the term has been used in psychology, medicine, and engineering for a long time, it is widely credited to ecologist C.S. Holling in the literature regarding global environmental change. The capacity of an ecosystem to retain basic functional features to address disturbance is described by Holling [29]. The conception of socio-ecological system (SES) theory, led by a group of interdisciplinary ecologists, was the basis of the ecological framework of resilience and perception of ecosystems as dynamic, complex, and adaptive [28]. By conceptualizing nature-society as an interconnected, coevolving structure, SES theory essentially applied Holling's ecological principles to the 'social'. Resilience is also described as a combination of a system's ability to withstand perturbation without losing important functions or altering states, the system's potential to self-organize, and the ability for adaptation [30].
For empirical and theory-driven urban management studies, urban sustainability and resilience are emerging topics. In this context, scholars should investigate the use of traditional and novel regulatory tools, concepts, dimensions, contexts, and systems to govern urban sustainability and resilience. Surprisingly, however, regulatory experts have paid little attention to cities and the built environment in general [31].
The use of resilience and sustainability are growing rapidly in policy discourse due to their popularity. Weichselgartner and Kelman [32] argue that "While the academic debate on describing resilience continues, governments around the world have developed plans and programs that aim to guide cities, communities, and authorities towards achieving it." There is a wide range of possible interpretations of the phrases "urban sustainability" and "urban resilience" in terms of the possible pursuit of various environmental, economic, social, demo-graphic, and institutional goals [33]. It is also possible to accomplish these goals in other ways. In this way, the definitions of urban sustainability and resilience specify the kinds of activities that people may take and the degree to which they can either promote change or maintain the status quo [34]. Therefore, this study contributes to the debate by analyzing how both concepts are operationalized over time and context. This study breaks the perplexing status quo by clarifying their meanings, dimensions, and relationships.
It is now frequently observed that scholars tend to use 'resilience' and 'sustainability' terms in many irrelevant fields. This unrelated use creates a long-term misunderstanding of its genuine meaning and leads to misunderstanding. We think that the main reason for these misuses is a lack of proper understanding of these popularly used terms (resilience and sustainability). Existing literature shows that the urban management field is also not free from this challenge. An in-depth understanding of two research questions is necessary for using these concepts, like (a) does any relationship exist between urban resilience and sustainability, and (b) how can urban resilience promote urban sustainability? Therefore, this study intends to clarify the meaning of 'urban resilience and sustainability and the relationship between these concepts. The findings will help understand the dynamics of urban resilience and sustainability and its measurement and management strategy from developed indicators.
There are six sections in this study. Following the introduction in Section 1, Section 2 presents a detailed methodology including research design, research protocol, search strategy, inclusion and exclusion criteria. Section 3 deals with the obtained results. Section 4 presents the discussion focusing on concepts, dimensions, and urban sustainability and resilience perspectives. Section 5 discusses the conclusion, limitation, and future research direction.

Materials and Methods
The study has used preferred reporting items for the systematic review and metaanalysis (PRISMA) approach by developing a research protocol. PRISMA is a recognized evidence-based approach for systematic review and meta-analysis [35]. It comprises four major steps: identification, screening, eligibility, and inclusion. It also consists of 27 items checklist. The main benefits of using PRISMA are its structure and formatting, replicability, evaluation of strengths and weaknesses, and demonstration quality of document selection. All essential steps like research design, reasons for database selection, publication criteria, time duration, search strategy, search fields, inclusion and exclusion criteria have been presented chronologically.

Research Design
This study applied a mixed-method comprising systematic literature review to select the most relevant documents and a narrative review approach for explaining the key findings of the selected documents. This comprehensive analysis and synthesis entail the examination of a large and diverse body of literature on the subject and the integration and fusion of numerous academic, scientific, and technological domains. This review and synthesis are systematic because it was organized, defined, and conducted following PRISMA [35].

Interdisciplinary Approach for Data Extraction
Sustainable urban management is fundamentally interdisciplinary due to its technological and social sciences integration nature [36]. This applies to any interdisciplinary review because it incorporates insights and approaches from multiple disciplines into a single concept [37]. In this case, the chosen fields are urban management, planning, geography, sustainability, and environmental and computer science. Multidisciplinary efforts continue to have a limited effect on theory development for adapting to the changing conditions [38]. Research on urban resilience and sustainability necessitates multidisciplinary, interdisciplinary, and transdisciplinary perspectives and techniques [39]. All, however, require conceptual accuracy to ensure the validity and usability of the study findings.

Development of a Research Protocol
A research protocol was developed to guide the study scientifically (Table 1). A systematic review of the existing literature was conducted over the last 21 years. This study emphasizes the comparatively recent studies for arguments regarding the potential application of urban resilience (UR) concepts and practices for ensuring urban sustainability (US).

Search Strategy
Generally, literature reviews help develop a new field of research and education. They usually offer a chance to analyze, synthesize, and focus on previous studies to find new knowledge that can help develop a new paradigm of education and research. An extensive systematic review was conducted under the guidance of PRISMA [40]. Keeping these philosophies in mind, this study searched several widely used databases like the Web of Science and Scopus using a few keywords like urban resilience, urban management, and sustainability. The Web of Science and Scopus databases are well-accepted databases due to the quality selection of the articles and journals. Though there are many databases, all are not equally accepted, like Web of Science and Scopus databases. Not all related articles of other databases are included in these databases because of their qualitative selections. But all quality articles are indexed either in the Web of Science and Scopus databases. Therefore, this study selected these databases as a source. This study was conducted in November 2021. The following strategies strings were followed ( Table 2). Table 2. Search string and research databases.

Inclusion and Exclusion Criteria
The predefined inclusion criteria were applied to select the most relevant documents, like (a) is the article highlighted on urban resilience and urban sustainability? and (b) is it focused on any relationship between urban resilience and sustainability? This study excludes articles published in a language other than English, no full text, or not exactly focusing on the desired issues.

Document Selection
The PRISMA approach has four key steps such as identification, screening, eligibility, and included. The study followed these key steps. The most relevant documents were identified using PRISMA guidelines [40] (Appendix A). At the identification stage, 1569 documents were obtained from 2 core databases and 7 documents from the reference sources. A careful screening technique was followed at the second level, which helped remove 1252 unnecessary documents. Many records were excluded due to the unavailability of the full text or for being out of the field. In the eligibility step, 73 documents were removed because of the unavailability of intended information. Finally, the most relevant 49 papers were identified for a thorough review [4,7,[10][11][12]15,33,34,. The documents were selected from journal articles for relevancy ( Figure 1).
The PRISMA approach has four key steps such as identification, screening, eligibility and included. The study followed these key steps. The most relevant documents were identified using PRISMA guidelines [40] (Appendix A). At the identification stage, 1569 documents were obtained from 2 core databases and 7 documents from the reference sources. A careful screening technique was followed at the second level, which helped remove 1252 unnecessary documents. Many records were excluded due to the unavailability of the full text or for being out of the field. In the eligibility step, 73 documents were removed because of the unavailability of intended information. Finally, the most relevan 49 papers were identified for a thorough review [4,7,[10][11][12]15,33,34,. The docu ments were selected from journal articles for relevancy ( Figure 1).

Word Clouds of Urban Resilience and Sustainability
The VOS viewer was used to create the word clouds [82]. When two papers share one or more references, bibliographic coupling occurs: the greater the overlap in references between two things, the more likely they are to belong to the same cluster. The VOS viewer creates a co-occurrence matrix, which shows a two-dimensional map of all the grouped elements based on their similarity measures. The stronger the links between the things reported in the matrix, the closer they are. This produces a cluster analysis, with groups understood as logical topics. An interpretive technique was used to organize clusters. Using these interpretations, a keyword analysis based on author keywords was used to investigate the most important issues covered in the scientific literature at the time. The purpose of generating a word cloud is to develop a concise picture of urban resilience and sustainability concepts and linkages among different related concepts. The phrases used most frequently in urban resilience and sustainability are depicted in Figure 2. The extracted articles' data demonstrate a minimum of five times co-occurrence of a term.

Word Clouds of Urban Resilience and Sustainability
The VOS viewer was used to create the word clouds [82]. When two papers share one or more references, bibliographic coupling occurs: the greater the overlap in references between two things, the more likely they are to belong to the same cluster. The VOS viewer creates a co-occurrence matrix, which shows a two-dimensional map of all the grouped elements based on their similarity measures. The stronger the links between the things reported in the matrix, the closer they are. This produces a cluster analysis, with groups understood as logical topics. An interpretive technique was used to organize clusters. Using these interpretations, a keyword analysis based on author keywords was used to investigate the most important issues covered in the scientific literature at the time. The purpose of generating a word cloud is to develop a concise picture of urban resilience and sustainability concepts and linkages among different related concepts. The phrases used most frequently in urban resilience and sustainability are depicted in Figure 2. The extracted articles' data demonstrate a minimum of five times co-occurrence of a term.

Analytical Results
Resilience and sustainability are multi-faceted notions that are applied to a variety of cases. The value-laden and contentious nature of the idea, which can be construed in various ways, is a major barrier that might derail the use of these concepts to guide planning activities. Resilience and sustainability are increasingly being recognized as a bridge concept that can promote inter-and transdisciplinary methods to dealing with the difficulties inherent in decision making under risk and uncertainty. As a result, it is vital to address the multiple components of resilience to improve human populations' capacity for adaptation. It is essential to understand dimensions to completely comprehend the interconnectedness and synergy of the many aspects of a problem [4]. Additionally, dimensions aim to align with the conventional understanding of resilience and sustainability [74]. Therefore, the study has identified the concepts, dimensions, and relationships between urban resilience and sustainability.

Analytical Results
Resilience and sustainability are multi-faceted notions that are applied to a variety of cases. The value-laden and contentious nature of the idea, which can be construed in various ways, is a major barrier that might derail the use of these concepts to guide planning activities. Resilience and sustainability are increasingly being recognized as a bridge concept that can promote inter-and transdisciplinary methods to dealing with the difficulties inherent in decision making under risk and uncertainty. As a result, it is vital to address the multiple components of resilience to improve human populations' capacity for adaptation. It is essential to understand dimensions to completely comprehend the interconnectedness and synergy of the many aspects of a problem [4]. Additionally, dimensions aim to align with the conventional understanding of resilience and sustainability [74]. Therefore, the study has identified the concepts, dimensions, and relationships between urban resilience and sustainability.

Summary of the Concepts Summary of Urban Resilience Concept
The study has extracted the opinion of scholars on urban resilience concepts. The sources and key opinions have been summarized and presented in Table 3. Table 3. Concepts of urban resilience.

Sources Time Summary of Concepts
Godschalk [83] 2003 Resilience is a linkage of physical systems and human societies that is self-sustaining.
Pickett et al. [84] 2004 Resilience is a system's capacity to adapt to changing situations.

IPCC [86] 2007
Resilience refers to a social or ecological system's potential to absorb perturbations while keeping its essential structure and modes of operation and its capacity for self-organization and adaptation to stress and change.
Alberti et al. [87] 2008 The degree to which cities accept change before reorganizing around a new set of structures and processes is resilience.
Lamond and Proverbs [88] 2009 "encompasses the idea that towns and cities should be able to recover quickly from major and minor disasters".
Wardekker et al. [89] 2010 "a system that can tolerate disturbances (events and trends) through characteristics or measures that limit their impacts, by reducing or counteracting the damage and disruption, and allow the system to respond, recover, and adapt quickly to such disturbances".
Ernstson et al. [90] 2010 "To sustain a certain dynamic regime, urban governance also needs to build transformative capacity to face uncertainty and change".
Leichenko [91] 2011 "the ability to withstand a wide array of shocks and stresses".
Romero-Lankao and Gnatz [92] 2011 "a capacity of urban populations and systems to endure a wide array of hazards and stresses".
Tyler and Moench [93] 2012 "encourages practitioners to consider innovation and change to aid recovery from stresses and shocks that may or may not be predictable".
Liao [94] 2012 "the capacity of the city to tolerate flooding and to reorganize should physical damage and socio-economic disruption occur, so as to prevent deaths and injuries and maintain current socio-economic identity".
Henstra [95] 2012 "A climate-resilient city can withstand climate change stresses, to respond effectively to climate-related hazards, and to recover quickly from residual negative impacts".
Wamsler et al. [96] 2013 "A disaster-resilient city can be understood as a city that has managed to: (a) reduce or avoid current and future hazards; (b) reduce current and future susceptibility to hazards; (c) establish functioning mechanisms and structures for disaster response; (d) establish functioning mechanisms and structures for disaster recovery".
Desouza and Flanery [98] 2013 "ability to absorb, adapt and respond to changes in urban systems".
Lu and Stead [99] 2013 "the ability of a city to absorb disturbance while maintaining its functions and structures".
Thornbush et al. [100] 2013 "a general quality of the city's social, economic, and natural systems to be sufficiently future-proof".
Wagner and Breil [101] 2013 "the general capacity and ability of a community to withstand stress, survive, adapt and bounce back from a crisis or disaster and rapidly move on". Table 3. Cont.

Wilson [102] 2013
Community resilience is both an outcome, especially when it comes to communities' better adaptive capacity, and a process or pathway linked to dynamic changes through time associated with community learning and communities' determination to take charge of their own development paths.
ADB [103] 2014 The ability of a city to function so that its citizens and workers, particularly the poor and vulnerable, may survive and develop regardless of the stressors or shocks they confront is referred to as urban resilience.

Bahadur and Thornton [104] 2015
For urban resilience, decentralized decision-making, systematic learning, interacting concurrently with numerous shocks and pressures, proper urban planning, and recognition of the political underpinnings of risk and vulnerability are all required.
HN-Habitat [105] 2017 'Resilience is viewed as a process, a state, and a quality.'

Zhang and Li [4] 2018
Urban resilience refers to an urban actor's ability to cope with or respond to hazard stress. Resistance refers to an individual's or a group's ability to withstand the effects of a threat in terms of their economic, psychological, and physical well-being, as well as their maintenance systems.
Meerow and Newell [34] 2019 Urban resilience as a border entity and the capacity of individuals, families, organizations, industries, and structures within a city's ability to thrive, adapt, and evolve regardless of the types of chronic stresses and acute shocks they face.
McGill [25] 2020 The ability of an urban area to withstand disruption and restore its conditions after a disturbance is known as urban resilience.
Bruzzone et al. [50] 2021 An urban resilient community is capable of managing unforeseen events and coping with pressures and shocks while preserving and developing its social, economic, and infrastructures systems.
Wubneh [15] 2021 The ability of an urban system to adapt and fully operate in order to maintain its shape, structure, and identity in the face of adversity is referred to as urban resilience.

Summary of Urban Sustainability Concept
The opinion of scholars on urban sustainability concepts has been extracted. The sources and critical views have been summarized and presented in Table 4.

Dimensions of Urban Resilience and Sustainability Dimensions of Urban Resilience
This study identified several indicators under each dimension. The key indicators under adaptive capacity are education, knowledge, skill, health, food, water, land, accommodation, training, inclusive access to credit and markets, social networks, ICT and technology, and legal and policy systems. Similarly, the key indicators under absorptive capacity are early warning system, community support, urban green space, protective infrastructure, access to transport, planning and framework development, united command development, determine ahead for each task, govern credit and resource distribution, human resource usage, utilization of equipment, and strengthen coverage of disaster management ( Table 5).
The key indicators under the transformative capacity are communication technology, a collaboration of multi-stakeholder, emergency services of government, community-oriented urban planning, monitoring expenses, human resources, and equipment quality monitoring, quality assurance, ensuring coordination, safety promotion, shared facilities of natural resources, community cooperatives/ club, inclusive governance for sharing benefits, equal access to community resources, and citizen engagement in the policy process. Table 4. Concepts of urban sustainability.

Summary of Concepts
Eastaway and Støa [106] The perception of sustainability as applied to a city in the metropolitan area's capacity and its region to continue to work at standards of quality of people's life desired by the population without reducing current and future generations' options or having adverse impacts both inside and outside the urban boundary.
Schwegler [107] The word "sustainable city" has many definitions, and it includes or is connected with several other, often contradictory, conceptual designations. They attempt to balance economic progress, life quality, and environmental sustainability.

Verma and Raghubanshi [108]
Urban sustainability is a cross-cutting topic that affects the climate, culture, and economy.
Wu [109] Urban sustainability is a vital adaptive mechanism that promotes and preserves a worthy cycle between ecological resources and people's well-being by coordinating ecological, economic, and social activities for changes within and outside the urban landscape.
Russo and Cirella [110] Ecosystem services are vital for urban sustainability, and they have a direct influence city quality of life.  [111] Chelleri et al. [53] Cobbinah [112] Meerow and Stults [28] Leitner et al. [113] Davoudi et al. [114] Malone [115] Panampitiya [116] McGill [16] Davoudi et al. [114] Absorptive capacity Access to transport Planning and framework development United command development Determine ahead for each task Early warning system Community support Urban green space Protective infrastructure Govern credit and resource distribution Human resource usage, Strengthen coverage of disaster management Utilization of equipment, Access to legal and policy system Ernstson et al. [90] Ribeiro and Gonçalves [117] Molavi [118] Ribeiro and Gonçalves [117] Brown et al. [119] Molavi [118] Meerow and Newell [34] Reischl et al. [120] Nagenborg [121] Moench [111] Chelleri et al. [53] Cobbinah [112] Sarker et al. [8] [128] Ribeiro and Gonçalves [117] Dimensions of Urban Sustainability The major dimensions of urban sustainability are environmental, economic, and social. Each dimension focuses on several indicators that can represent the status of the specific dimension (Table 6). Indicators are essential at all stages of achieving results-oriented assessment. It helps to know the current status to provide a basis for measuring environmental, economic, and social change. By informing policymakers and the general public about the present condition of the environment, its strengths and weaknesses, and defining priority areas, indicators help achieve sustainability goals [129]. The indicators help validate a framework while also offering insight into the examined phenomenon. Simple indicators take individual phenomena like the number of poor people or the percentage of land covered by trees and combine them into a composite index based on the constituent indicators' weighting [130]. It helps evaluate, review, and implement sustainable practices and formulate public awareness policies [109]. Metrics can help policymakers make informed decisions, and results must be reported without ambiguity [131]. Sustainability indicators can serve as a benchmark for comparing current and baseline conditions [132]. They reflect policy measures, particularly for whom such measures can be implemented. As a result, indicators with political support are more likely to succeed and be accepted.

Relationship between Urban Resilience and Sustainability
The relationship between resilience and sustainability is sometimes misunderstood conceptually [12] (Table 7). In some contexts, the terms sustainability and resilience can be applied interchangeably. Resilience is also considered a major element of wider sustainability goals. It also has been praised as a new and better paradigm. According to leading resilience scholars, system resilience is critical for attaining sustainability in "a world of transitions" [148]. Thus, as a vivid concept, resilience has no conflict with sustainability. Despite their disparate theoretical foundation, there are essential distinctions when understood as a paradigm for environmental transformation and management.
Resilience places a premium on system-based modeling and analyzes SESs as the fundamental unit of evaluation. This can obscure systemic disparities, overlook the diversity of social players engaged, and provide little focus on social dynamics. There is a considerable emphasis on balancing economic, environmental, and social justice goals in the sustainability literature. Such themes receive little attention in resilience studies [149]. In some cases, such as sustainability and resilience, these concepts are interchangeable. In other instances, these are inversely associated, with resilience viewed as the polar opposite of vulnerability or perhaps one of its determinants [150]. Table 7. Summary of the scholar's opinion about nexus between UR and US.

Summary of the Opinion Time Sources
Obtaining resilient sustainability will need considerable technological advancements. Addressing the sustainability and resilience concerns, perhaps, will demand a transdisciplinary and integrative approach to sustainability.

2011
Ahern [44] Numerous cities have begun to apply the concepts of urban resilience and sustainability to specific places. However, urban resilience and sustainability are not location-specific but rather refer to whole systems-open systems comprised of a diverse variety of resources, assets, and knowledge fluxes. The connections may be rather intricate, and the feedback systems can be indirect.

2014
Elmqvist [151] Urban sustainability is a slightly more developed idea, and its conceptualizations generally include at least three distinct types of urban dynamics. 2016 Trundle et al. [152]

Summary of the Opinion Time Sources
Resilience and sustainability have emerged as critical concepts for comprehending contemporary urban dynamics and addressing the issues associated with developing habitable urban futures.

2016
Romero-Lankao et al. [153] With current demographics, urbanization, and changing climate concerns, incorporating sustainability and resilience concepts into urban planning becomes critical for decision-makers globally.

2016
Grafakos et al. [154] Urban sustainability and resilience is an enticing topic of regulatory and governance research, both empirical and theoretical. There are a number of factors that contribute to the complexity of urban sustainability and resilience management, including a wide range of actors and concerns, settings, and the rapid development in urban networks.

van der Heijden [31]
The concepts of urban resilience and sustainability vary not just in terms of the theoretical foundations but also in terms of their empirical investigations. Real urban development may be obtained only when it is resilient and sustainable.

Zhang and Li [4]
Resilience is emerging as a paradigm of managing urban sustainability. 2021 Bruzzone et al. [50] While resilience is appealing academically, it is often ignored in contemporary urban planning and architecture. A system can respond to change or disruption without altering its fundamental state. It is contingent upon one's capacity to adjust to unprecedented and unexpected changes.

Concepts of Urban Resilience
The resilience definition has been used in various scientific ways, transforming it from a descriptive word to a normative method or "way of thinking". The normative approach mainly deals with the value judgment of the concept for its rational use. This way of thinking about how a complex system can persist when facing complexity, disruption, and change has become standard. Resilience may be positive or negative, but in academic and policy circles, "resilience thinking," and the notion of "resilient cities" have developed as normative, desirable objectives. These various interpretations of the word have resulted in many meanings and misunderstandings about what resilience is and how it applies to other important concepts. Holling [156] differentiated between static "engineering" resilience, which relates to the ability of a system to rebound back to its former state, and dynamic "ecological" resilience, which indicates preserving key roles when disturbed, by describing ecosystems as taking several stable states as an example.

Key Dimensions of Urban Resilience
Generally, there are three major components of urban resilience: adaptive, absorptive, and transformative. The holistic view of urban resilience has been presented in Figure 3.

Adaptive Capacity
Adaptive capacity is the ability to make small, deliberate changes in advance of or in response to a change in order to increase potential flexibility [8]. It is important because change is constant and unpredictable, and deliberate transformation requires time and commitment. Making necessary changes to better accommodate or respond to a changing environment is what adaptation is all about. Accepting that change is highly uncertain is an essential feature of adaptive capability. That is why adaptive capacity is all about adaptability and the ability to make minor improvements over time through a process of constantly adapting, learning, and innovation and the degree to which a system can alter while maintaining its purpose and structure. People's absorption ability must be increased by using local networks, access to knowledge, and good farming practices. Adaptive ability is typically demonstrated or deployed in food systems to sustain livelihoods, food production, or food access [9]. It is crucial to differentiate between adaptation ability and mitigation in light of climate change. Adaptive capacity is used to adjust to changes in growing or living environments and shocks caused by climate change. Mitigation entails deliberately mitigating the impact of climate change rather than adapting to its consequences, such as lowering pollution, reducing meat intake among meat-consuming populations, or geoengineering the atmosphere to lower CO 2 concentrations.

Adaptive Capacity
Adaptive capacity is the ability to make small, deliberate changes in advance of o response to a change in order to increase potential flexibility [8]. It is important beca change is constant and unpredictable, and deliberate transformation requires time a commitment. Making necessary changes to better accommodate or respond to a chang environment is what adaptation is all about. Accepting that change is highly uncertain an essential feature of adaptive capability. That is why adaptive capacity is all ab adaptability and the ability to make minor improvements over time through a proces constantly adapting, learning, and innovation and the degree to which a system can a while maintaining its purpose and structure. People's absorption ability must be creased by using local networks, access to knowledge, and good farming practices. Ad tive ability is typically demonstrated or deployed in food systems to sustain livelihoo The second important property is adaptive capability, which refers to the ability of agri-food systems to respond to extreme conditions. Within agri-food systems, for example, human systems can be able to migrate to alternative land use. People will be able to adapt to change in these situations because they can adjust their land and other resources.

Absorptive Capacity
Absorptive capacity means the ability of a system to take deliberate preventive measures and cope with established shocks and stress [8]. It is required because shocks and tension will continue to occur, such as extreme weather actions brought about by climate change, prolonged war, and natural disasters. This refers to the ability to recover from a shock. Anticipating, preparing, coping, and recovering from real, established shocks and short-term stresses are all part of the process. Absorptive capacity focuses on avoiding or mitigating the harmful effects of shocks on individuals, families, societies, industries, and governments [15]. Absorptive capacity also focuses on combining experiences and skills and incremental changes to external drivers. Through learning, funding, and diversifying development, it is necessary to make necessary adjustments to better handle or adapt to adverse conditions.

Transformative Capacity
Transformative capacity is the ability to implement changes to stop or reduce the causes of risk and vulnerability and ensure an equitable risk-sharing condition [8]. People living in poverty or experiencing deprivation are not unfairly burdened. Transformation can also address the root causes of risk and poverty, such as development failures or power imbalances. Transformation addresses the structural or root causes of risk and vulnerability rather than the immediate or proximate causes. It is also likely that a transition at one level would create momentum at a higher level. Increased gender justice in the home, for example, will create support for progress in the larger society. This is also known as passing a level or being at a turning point. External disasters, such as an earthquake or other catastrophes, are the most common causes of tipping points. Slow change can also lead to a leaning point when a region becomes too drought-prone for current agricultural practices [15]. These upheavals in the status quo allow reorganizing and potentially transforming inequitable and ineffective practices and systems. When the initial state is no longer bearable, a new structure is created by drastically changing its features and behavior. Transformational responses are guided by self-organization, risk management, and efficient institutions [97].

Characteristics of Urban Resilience
Urban resilience usually has seven key characteristics to protect against the vulnerability of natural hazards: reflective, redundant, robust, inclusive, integrated, resourceful, and flexible of an urban system (Figure 3).
Reflective: People and organizations learn from their mistakes through an adaptive preparation mentality that recognizes unpredictability. Rather than finding enduring solutions based on an appraisal of current shocks and stresses, they have processes in place to continually change standards based on new data.
Robust: Robust city structures are designed and maintained to withstand the effects of severe weather and prevent the city from collapsing due to the failure of a single component. A stable device anticipates system failures and builds safeguards to ensure predictability and protection [8].
Redundant: When one system element fails, other components or ways may meet critical functional requirements. For example, having several access points to various utility services of a city. Overdependence on a "fail-safe" device may reveal a fundamental deficiency of resilience.
Flexible: In response to changing circumstances, a city with flexible structures can adapt, develop, and implement alternative strategies. The decentralization of traditional infrastructure with emerging technology is favored in these systems.
Resourceful: People and organizations should invest in their ability to predict future urban developments, set goals, and organize and organize resources. A city's resource capitals can prepare it to adapt quickly to severe incidents, adjusting organizations and procedures when necessary [15].
Inclusive: Communities, especially those marginalized, are consulted and engaged as part of an inclusive approach. A city's resilience cannot be built in isolation from the rest of the world. Collective ownership and a shared vision from different groups in the city are needed for resilience [8].
Integrated: City processes, decision-making, and investments can all work together to achieve a common goal. Proof of processes that operate across various service scales can be found in resilient system integration. Integration necessitates a continuous feedback mechanism for data collection and response [128].

Concepts of Urban Sustainability
Many scholars still largely overlook the concepts of urban sustainability and sustainable development. Before assessing urban sustainability, some scholars argue that there needs to be more consensus about what it entails. Sustainable development is impossible in an unhealthy urban environment. Consequently, environmental sustainability must also be extended to urban settings [134]. City planners, stakeholders, and players involved in the entire urban planning process should apply priorities, policies, mechanisms, and metrics for achieving urban sustainability. At the same time, proposals and targets for sustainable growth should be accomplished through policy, decision-making, and politics. Given the conditions, a substantial distinction should be made between sustainable growth and urban sustainability [109]. Urban sustainability cannot be achieved by avoiding extreme social inequality, natural resources, sustainable growth, human health, and prosperity [134]. Consequently, while sustainable growth is a global and slightly abstract aim, urban sustainability denotes events on a more specific and local scale.

Urban Sustainability Dimensions Environmental Sustainability
Environmental sustainability is a basic concept of sustainability. It means that fulfilling needs might not come at the cost of the environment's efficiency and that the ecological system should be protected for future generations [147]. Incorporating environmental sustainability practices into urban management practices can reduce urban areas' vulnerability and enhance urban citizens' resilience [107]. The constant rise in emissions and depletion of resources has raised environmental conservation to a new level of urgency, demanding peoples', companies', and governments' undivided attention. As a result, citizen and stakeholder pressures are rising to implement environmentally friendly practices. Thus, sustainable practices can be positioned to deliver more value to people and enhance resilience. Environmentally sustainable activities must be addressed when urban actors implement digital transformation strategies to evolve urban development models and create compelling impacts [144]. Environmental planning and sustainability policy are essential aspects of controlling ecological resources, provisioning natural ecosystems, and ecological services.

Social Sustainability
Since most sustainability studies emphasize environmental or economic aspects, social sustainability is often overlooked. All three components of sustainability must be addressed to produce the most long-term results. Social sustainability is achieved when internal and external procedures, initiatives, constructions, and alliances actively foster present and future generations' capacity to create healthy and sustainable communities [36]. Economically sustainable societies are equal, diverse, linked, and democratic, with a high quality of life. It is a process for ensuring effective good places that promote well-being by realizing what people need from their lives and work. Social sustainability encompasses both physical and social domain indicators.

Economic Sustainability
The notion of resource planning is used to define and explain the present worth of resources as well as their potential future value in the economy. To explain the value, criteria like added value, assets and responsibilities, savings, patents, and intangible assets may be used. The term "economic sustainability" refers to a subset of the term "sustainability." It refers to how we utilize, safeguard, and maintain resources in urban management to produce long-term value through optimum use, regeneration, and recycling. [143]. To put it another way, we must protect scarce natural resources now for future generations to fulfill their own needs.

Urban Resilience for Promoting Urban Sustainability
Sustainability is considered a societal goal, but resilience is regarded as a characteristic of the urban system. The two concepts operate together as a formidable duo [153]. A city's ability to adapt and recover when confronted with adversity improves when it engages in sustainable growth initiatives. The ability to maintain human and environmental wellbeing while also guaranteeing that the well-being and capacity of locations throughout the world to be adaptive and sustainable are not harmed is achieved through this process [154].
Urban planning must change and be flexible to support sustainable growth, increase resilience, and advance remedies for current urban challenges. Many cities have already begun to apply the concepts of urban resilience and sustainability to specific areas. However, URS (urban resilience and sustainability) are not limited to a single site but rather apply across entire systems, including a diverse spectrum of resources, wastes, assets, and knowledge movements. The connections can be complicated, and the feedback systems can be indirect. Unintended implications of a restrictive definition and local application of sustainability can include 'locking in' suboptimal urban growth trajectories and degradation of sustainability elsewhere. On the other hand, new models are emerging that add value to nature's services in urban contexts. When combined with growing global cooperation among cities, they may support constructing the chains of sustainable resources.
However, while resilience and sustainability are fundamentally concerned with preserving societal health and well-being within the context of a broader framework of environmental change, there are significant differences in their emphasis and time scale, particularly in the context of urbanization. The term "sustainability" refers to the desire for long-term mutual benefit between culture and the environment [157]. Sustainability has always been an unsolidified notion that acknowledges the limitations of present knowledge and the danger involved in basing all decisions solely on the most robust empirical data. Nonetheless, it is now widely recognized that the organization and operation of a sustainable system require embedded strategies and nested tactics that can react quickly and effectively within accelerated time-scales, allowing for the recovery from dramatic system shocks while maintaining basic system integrity or, more preferably, while maintaining capacities for adaptation to changing conditions that are both engaged and undiminished [158].

Conclusions
Urbanization and natural hazards are two of the most pressing issues today. These phenomena are inextricably related and evidence of interactions with other processes. Climate change directly impacts the lives of millions of people worldwide, not only in developing countries. As a result, the effects of climate change, including floods, droughts, and hurricanes, are not evenly felt or distributed, and human social contact with climaterelated hazards necessitates further implicit consideration. This study is an initiative to clarify the concepts UR and US for genuine use. This study argues that sustainability and resilience are interconnected paradigms that highlight a system's capacity to achieve sustainable urban development. Resilience and sustainability are concerned with conserving societal health and well-being within the context of environmental change. In the rapid urbanization context, both concepts provide different meanings in their emphasis and time scales.
Sustainability remains an effective normative idea that promotes mutually beneficial relationships for society and the environment. It imposes on us the responsibility to prevent behaviors that we anticipate or believe will weaken that relationship. It is not about establishing an unattended balance but rather about tender care and awareness of our actions. Resilience has evolved as an important component of sustainability in recent years. It is concerned with recovery from individual environmental, societal, or economic shocks and adaptation to several occurrences or chronic challenges such as climate change. While society's persistence is the most fundamental necessity for resilience, the capacity to adapt and transform aspires to a higher degree of response. This increased resilience is the surest path to the long-term mutual advantages of sustainability. This study has also identified key indicators under three major components for addressing urban vulnerability: adaptive capacity (education, health, food, and water), absorptive capacity (community support, urban green space, protective infrastructure, and access to transportation), and transformative capacity (communication technology, multi-stakeholder collaboration, and government emergency services). In some contexts, the terms sustainability and resilience can be applied interchangeably. Resilience is also considered a major element of wider sustainability goals. It also has been praised as a new and better paradigm. This study argues that system resilience is critical for attaining sustainability in a rapidly urbanized condition. Understanding the relationship between UR and the US is deemed critical for policymakers, as seen by the development of the UN's 11th Sustainable Development Goal (SDG), which aims to make cities more inclusive, safe, resilient, and sustainable. The findings will aid in the comprehensive understanding of the dynamics of urban vulnerability, resilience, and sustainability and the measurement and management approach and help achieve a sustainable and resilient city.
Future research into the role of urban resilience in attaining urban sustainability is critical. This study has several limitations due to its nature. Firstly, this study is based on the secondary sources available in the existing literature. Secondly, the search strings retrieved only the most relevant literature, rather than retrieving all due to a wider application of urban resilience and sustainability concepts. Thirdly, this study covered a period from 1 January 2001 to 30 November 2021, rather than from the initiation of the concepts. Finally, this study emphasized only the most relevant theoretical explanation of the scholars rather than covering all to contribute to the current debate. Future studies may address this limitation by incorporating primary data for each urban resilience and sustainability indicator. As this research demonstrated, one of the primary goals of urban resilience is to improve system's adaptive, absorptive, and transformative capacity. Yet, there is no clear definition of what this entails or cost to society and the environment. Thus, future efforts to define urban resilience should investigate the causal relationship between improved citizens' capacity and the use of contemporary technology. This may provide ample space to use urban resilience practices for ensuring urban sustainability.  Specify the methods used to decide whether a study met the inclusion criteria of the review, including how many reviewers screened each record and each report retrieved, whether they worked independently, and if applicable, details of automation tools used in the process.

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Data collection process 9 Specify the methods used to collect data from reports, including how many reviewers collected data from each report, whether they worked independently, any processes for obtaining or confirming data from study investigators, and if applicable, details of automation tools used in the process.

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Data items 10a List and define all outcomes for which data were sought. Specify whether all results that were compatible with each outcome domain in each study were sought (e.g., for all measures, time points, analyses), and if not, the methods used to decide which results to collect.

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List and define all other variables for which data were sought (e.g., participant and intervention characteristics, funding sources). Describe any assumptions made about any missing or unclear information.

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Study risk of bias assessment 11 Specify the methods used to assess risk of bias in the included studies, including details of the tool(s) used, how many reviewers assessed each study and whether they worked independently, and if applicable, details of automation tools used in the process.
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Effect measures 12
Specify for each outcome the effect measure(s) (e.g., risk ratio, mean difference) used in the synthesis or presentation of results.

Section and Topic
Item # Checklist Item

Location Where Item Is Reported
Synthesis methods 13a Describe the processes used to decide which studies were eligible for each synthesis (e.g., tabulating the study intervention characteristics and comparing against the planned groups for each synthesis (item #5)).

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Describe any methods required to prepare the data for presentation or synthesis, such as handling of missing summary statistics, or data conversions. Page 5 13c Describe any methods used to tabulate or visually display results of individual studies and syntheses. Page 5 13d Describe any methods used to synthesize results and provide a rationale for the choice(s). If meta-analysis was performed, describe the model(s), method(s) to identify the presence and extent of statistical heterogeneity, and software package(s) used.

N/A
13e Describe any methods used to explore possible causes of heterogeneity among study results (e.g., subgroup analysis, meta-regression).

N/A
13f Describe any sensitivity analyses conducted to assess robustness of the synthesized results. N/A Reporting bias assessment 14 Describe any methods used to assess risk of bias due to missing results in a synthesis (arising from reporting biases).

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Certainty assessment 15 Describe any methods used to assess certainty (or confidence) in the body of evidence for an outcome.
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Study selection 16a
Describe the results of the search and selection process, from the number of records identified in the search to the number of studies included in the review, ideally using a flow diagram. Page 6 16b Cite studies that might appear to meet the inclusion criteria, but which were excluded, and explain why they were excluded.

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Study characteristics 17 Cite each included study and present its characteristics. Page 6 Risk of bias in studies 18 Present assessments of risk of bias for each included study. Page 6 Results of individual studies

19
For all outcomes, present, for each study: (a) summary statistics for each group (where appropriate) and (b) an effect estimate and its precision (e.g., confidence/credible interval), ideally using structured tables or plots.

Section and Topic
Item # Checklist Item

Results of syntheses 20a
For each synthesis, briefly summarise the characteristics and risk of bias among contributing studies. Page 7 20b Present results of all statistical syntheses conducted. If meta-analysis was done, present for each the summary estimate and its precision (e.g., confidence/credible interval) and measures of statistical heterogeneity. If comparing groups, describe the direction of the effect. Page 7 20c Present results of all investigations of possible causes of heterogeneity among study results. Page 8 20d Present results of all sensitivity analyses conducted to assess the robustness of the synthesized results. N/A

Reporting biases 21
Present assessments of risk of bias due to missing results (arising from reporting biases) for each synthesis assessed. Page 9 Certainty of evidence 22 Present assessments of certainty (or confidence) in the body of evidence for each outcome assessed. Page 9

Discussion 23a
Provide a general interpretation of the results in the context of other evidence.  Discuss any limitations of the evidence included in the review. Page 19 23c Discuss any limitations of the review processes used. Page 19 23d Discuss implications of the results for practice, policy, and future research. Page 19

OTHER INFORMATION
Registration and protocol 24a Provide registration information for the review, including register name and registration number, or state that the review was not registered.

N/A 24b
Indicate where the review protocol can be accessed, or state that a protocol was not prepared. Page 5 24c Describe and explain any amendments to information provided at registration or in the protocol. N/A

Support 25
Describe sources of financial or non-financial support for the review, and the role of the funders or sponsors in the review.

Competing interests 26
Declare any competing interests of review authors. Page 19 Availability of data, code and other materials 27 Report which of the following are publicly available and where they can be found: template data collection forms; data extracted from included studies; data used for all analyses; analytic code; any other materials used in the review.