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Keywords = channel encroachment

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18 pages, 677 KiB  
Article
Optimizing Hydrodynamic Regulation in Coastal Plain River Networks in Eastern China: A MIKE11-Based Partitioned Water Allocation Framework for Flood Control and Water Quality Enhancement
by Haijing Gao, Qian Wang, Zheng Zhou, Wan Wu, Weiying Wang, Yan Li, Jianyong Hu, Puxi Li, Yongpeng Zhang and Wenjing Hu
Water 2025, 17(12), 1829; https://doi.org/10.3390/w17121829 - 19 Jun 2025
Viewed by 357
Abstract
The effective management of river networks in coastal plains is crucial to flood control, water quality improvement, and sustainable flow distribution. This study aims to optimize the hydrodynamic performance of a plain river network in eastern China through water diversion and circulation scheduling, [...] Read more.
The effective management of river networks in coastal plains is crucial to flood control, water quality improvement, and sustainable flow distribution. This study aims to optimize the hydrodynamic performance of a plain river network in eastern China through water diversion and circulation scheduling, addressing challenges such as channel narrowing and sedimentation. This research study utilized a partitioned water allocation approach modeled in MIKE11 to simulate the effects of various diversion projects, including locks and connecting rivers, on the primary conveyance channel and supporting rivers. The simulation results indicated that flow velocities exceeded 0.1 m/s in most rivers, with significant improvements in flood discharge and water quality in the main conveyance channel and one supporting river. However, some sections of the network showed poor hydrodynamic performance due to narrow channels, encroachment, and sedimentation, and smaller rivers exhibited inadequate flow capacity. The findings provide critical insights for optimizing hydrodynamic regulation in coastal plain river systems, emphasizing the need to address specific issues to enhance overall network performance and flood resilience. Full article
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20 pages, 3580 KiB  
Article
Optimizing PV Panel Segmentation in Complex Environments Using Pre-Training and Simulated Annealing Algorithm: The JSWPVI
by Rui Zhang, Ruikai Hong, Qiannan Li, Xu He, Age Shama, Jichao Lv and Renzhe Wu
Land 2025, 14(6), 1245; https://doi.org/10.3390/land14061245 - 10 Jun 2025
Viewed by 382
Abstract
Photovoltaic (PV) technology, as a crucial source of clean energy, can effectively mitigate the impact of climate change caused by fossil fuel-based power generation. However, improper use of PV installations may encroach upon agricultural land, grasslands, and other land uses, thereby affecting local [...] Read more.
Photovoltaic (PV) technology, as a crucial source of clean energy, can effectively mitigate the impact of climate change caused by fossil fuel-based power generation. However, improper use of PV installations may encroach upon agricultural land, grasslands, and other land uses, thereby affecting local ecosystems. Exploring the spatial characteristics of centralized or distributed PV installations is essential for quantifying the development of clean energy and protecting agricultural land. Due to the distinct characteristics of centralized and distributed PV installations, large-scale mapping methods based on satellite remote sensing are insufficient for creating detailed PV distribution maps. This study proposes a model called Joint Semi-Supervised Weighted Adaptive PV Panel Recognition Model (JSWPVI)to achieve reliable PV mapping using UAV datasets. The JSWPVI employs a semi-supervised approach to construct and optimize a comprehensive segmentation network, incorporating the Spatial and Channel Weight Adaptive Model (SCWA) module to integrate different feature layers by reconstructing the spatial and channel weights of feature maps. Finally, a guided filtering algorithm is used to minimize non-edge noise while preserving edge integrity. Our results demonstrate that JSWPVI can accurately extract PV panels in both centralized and distributed scenarios, with an average extraction accuracy of 91.1% and a mean Intersection over Union of 77.7%. The findings of this study will assist regional policymakers in better quantifying renewable energy potential and assessing environmental impacts. Full article
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24 pages, 2059 KiB  
Article
How Does the Manufacturer Optimize Pricing Decision and Channel Strategy Under Platform Encroachment?
by Hao Li and Xin Yuan
Systems 2025, 13(6), 416; https://doi.org/10.3390/systems13060416 - 28 May 2025
Viewed by 328
Abstract
The rise of platform competition, driven by the rapid emergence of new e-commerce platforms, has fundamentally reshaped traditional supply chain structures. Under platform encroachment, the manufacturer faces the critical challenge of optimizing their channel strategies to expand market demand and increase profit. To [...] Read more.
The rise of platform competition, driven by the rapid emergence of new e-commerce platforms, has fundamentally reshaped traditional supply chain structures. Under platform encroachment, the manufacturer faces the critical challenge of optimizing their channel strategies to expand market demand and increase profit. To address this, this paper develops a game model considering a manufacturer, a retailer, and two e-commerce platforms (an incumbent and an entrant). The model examines three channel strategies: the single-platform strategy, the synchronous channel strategy, and the reset channel strategy. This paper analyzes how the platform service differentiation and the unit channel setup cost of the manufacturer under the reset channel strategy influence pricing decisions and the manufacturer’s channel strategy. The findings indicate that the synchronous channel strategy yields a higher product price than the reset channel strategy while maximizing dual-platform demand when the extent of platform service differentiation is moderate and the unit channel setup cost is low. Under these conditions, the synchronous and reset channel strategies yield higher expected profits for the manufacturer and retailer than the single-platform strategy. Moreover, the best option for the manufacturer is the synchronous channel strategy when the extent of platform service differentiation is moderate and the unit channel setup cost is relatively high, which achieves a Pareto improvement for all participants. However, the reset channel strategy benefits the entrant platform when the unit channel setup cost is low. The study provides a theoretical foundation for the manufacturers to optimize their channel configurations and effectively adapt to platform competition. Full article
(This article belongs to the Section Systems Practice in Social Science)
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26 pages, 1736 KiB  
Article
Supplier Encroachment Channel Selection on an Online Retail Platform
by Zongyu Mou, Kaixin Ding, Yaping Fu and Hao Sun
Systems 2025, 13(1), 66; https://doi.org/10.3390/systems13010066 - 20 Jan 2025
Cited by 1 | Viewed by 1105
Abstract
Online retail platforms offer encroachment opportunities for suppliers to directly sell products to consumers on the online market. However, how to select appropriate encroachment channels poses a significant challenge for suppliers. To solve this problem, we take one supplier selling products through an [...] Read more.
Online retail platforms offer encroachment opportunities for suppliers to directly sell products to consumers on the online market. However, how to select appropriate encroachment channels poses a significant challenge for suppliers. To solve this problem, we take one supplier selling products through an indirect reselling channel on a third-party online retail platform (TORP) as the base model, and further consider that the supplier can choose TORP agency selling, the owned channel, or both to encroach onto the online market. We hereby establish game-theoretical models to analyze the optimal strategy of supplier encroachment, the TORP preference, and the equilibrium channel strategy. The findings show that the supplier is always willing to encroach onto the online market through its own channel. Additionally, when the commission rate is low, the supplier will further encroach via the TORP agency selling channel. The TORP provides the agency selling channel for the supplier only when the commission rate exceeds a certain threshold. If the channel competition is not very fierce (the competition intensity is lower than 0.852) and the commission rate is moderate, dual-channel encroachment is the equilibrium channel strategy; otherwise, supplier-owned-channel encroachment is the equilibrium strategy. We extend our main models by incorporating supplier blockchain adoption and the cost differences between both parties to enhance practical applicability. Full article
(This article belongs to the Section Supply Chain Management)
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24 pages, 9347 KiB  
Article
RDAU-Net: A U-Shaped Semantic Segmentation Network for Buildings near Rivers and Lakes Based on a Fusion Approach
by Yipeng Wang, Dongmei Wang, Teng Xu, Yifan Shi, Wenguang Liang, Yihong Wang, George P. Petropoulos and Yansong Bao
Remote Sens. 2025, 17(1), 2; https://doi.org/10.3390/rs17010002 - 24 Dec 2024
Cited by 1 | Viewed by 887
Abstract
The encroachment of buildings into the waters of rivers and lakes can lead to increased safety hazards, but current semantic segmentation algorithms have difficulty accurately segmenting buildings in such environments. The specular reflection of the water and boats with similar features to the [...] Read more.
The encroachment of buildings into the waters of rivers and lakes can lead to increased safety hazards, but current semantic segmentation algorithms have difficulty accurately segmenting buildings in such environments. The specular reflection of the water and boats with similar features to the buildings in the environment can greatly affect the performance of the algorithm. Effectively eliminating their influence on the model and further improving the segmentation accuracy of buildings near water will be of great help to the management of river and lake waters. To address the above issues, the present study proposes the design of a U-shaped segmentation network of buildings called RDAU-Net that works through extraction and fuses a convolutional neural network and a transformer to segment buildings. First, we designed a residual dynamic short-cut down-sampling (RDSC) module to minimize the interference of complex building shapes and building scale differences on the segmentation results; second, we reduced the semantic and resolution gaps between multi-scale features using a multi-channel cross fusion transformer module (MCCT); finally, a double-feature channel-wise fusion attention (DCF) was designed to improve the model’s ability to depict building edge details and to reduce the influence of similar features on the model. Additionally, an HRI Building dataset was constructed, comprising water-edge buildings situated in a riverine and lacustrine regulatory context. This dataset encompasses a plethora of water-edge building sample scenarios, offering a comprehensive representation of the subject matter. The experimental results indicated that the statistical metrics achieved by RDAU-Net using the HRI and WHU Building datasets are better than those of others, and that it can effectively solve the building segmentation problems in the management of river and lake waters. Full article
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25 pages, 2572 KiB  
Article
Manufacturer Encroachment on a Sustainable Supply Chain under Asymmetric Green Information
by Yufei Hu, Xiaorong Du and Lianghua Chen
J. Theor. Appl. Electron. Commer. Res. 2024, 19(3), 2114-2138; https://doi.org/10.3390/jtaer19030103 - 26 Aug 2024
Cited by 1 | Viewed by 1330
Abstract
This paper investigates manufacturer encroachment on a sustainable supply chain, where the manufacturer holds exclusive information on product greenness and is responsible for both corporate social responsibility (CSR) and greening. The manufacturer and the retailer play a signaling game whereby CSR effort and [...] Read more.
This paper investigates manufacturer encroachment on a sustainable supply chain, where the manufacturer holds exclusive information on product greenness and is responsible for both corporate social responsibility (CSR) and greening. The manufacturer and the retailer play a signaling game whereby CSR effort and wholesale price serve as joint green signals. Findings reveal that, firstly, encroachment induces higher CSR efforts from manufacturers. When customers exhibit a strong CSR preference, the resulting CSR increment leads to increased offline demand and drives up both wholesale and retail prices in a mutually beneficial manner. This phenomenon is referred to as the CSR effect, yielding a win-win encroachment. Secondly, when signaling product greenness to highly CSR-sensitive customers, the high-greenness manufacturer principally distorts her CSR effort downward to an extent unprofitable for the low-greenness manufacturer to mimic and subordinately distorts the wholesale price downward to counter CSR-induced demand decrement and mitigate CSR cost pass-through downstream. Finally, the win-win encroachment pattern is characterized by encroachment profit and signal expense sharing, with encroachment strengthening downward-distorted signaling while signaling weakens the CSR effect. These insights contribute valuable guidance for green manufacturers in CSR decision-making, which functions as a component of green signaling and facilitates transitioning to dual-channel sustainable supply chains. Full article
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25 pages, 4433 KiB  
Article
Sequential Changes in Coastal Plain Rivers Influenced by Rising Sea-Level
by Jonathan D. Phillips
Hydrology 2024, 11(8), 124; https://doi.org/10.3390/hydrology11080124 - 17 Aug 2024
Cited by 1 | Viewed by 1714
Abstract
Coastal backwater effects on low-gradient coastal plain rivers extend well upstream of the head of the estuary and propagate upstream as sea-level rises. Hydrological, geomorphological, and ecological indicators can serve as sentinels of the upriver encroachment. Analyzing the along-river spatial distribution of these [...] Read more.
Coastal backwater effects on low-gradient coastal plain rivers extend well upstream of the head of the estuary and propagate upstream as sea-level rises. Hydrological, geomorphological, and ecological indicators can serve as sentinels of the upriver encroachment. Analyzing the along-river spatial distribution of these indicators as a space-for-time substitution allows the prediction of sequential changes. Interpretation of results from 20 rivers in Virginia and the Carolinas shows that backwater effects at the leading edge result in higher river stages, increasing floodplain inundation, and raising water tables. Lower slopes and flow velocities reduce sediment transport, reducing river sediment input and floodplain deposition. This inhibits natural levee development, reducing bank heights. These factors combine to increase the frequency and duration of inundation, resulting in semi-permanently flooded wetlands. Anaerobic conditions limit organic decomposition, and ponding allows transported and suspended organic matter to settle, leading to organic muck and peat floodplain soils. This accumulation, coupled with general valley-filling, buries alluvial terrace remnants. Finally, vegetation changes driven by salinity increases occur, resulting in swamp conversions to brackish marsh. Backwater encroachment is strongly controlled by channel bed slope, with relatively steeper channels experiencing slower rates of tidal extension. With accelerating sea-level rise (SLR), the lowest-sloping channels could experience encroachment rates of >1 km yr−1. Hydrological changes associated with SLR are most rapid at the leading, upriver end—averaging 71 km upstream of the head of the estuary in the study rivers at present—and at the lowermost, downstream end of the fluvial-estuarine transition zone. Full article
(This article belongs to the Section Hydrology–Climate Interactions)
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19 pages, 2699 KiB  
Article
Pricing Decisions in Dual-Channel Supply Chains Considering the Offline Channel Preference and Service Level
by Yanting Chen and Mengling Wu
Mathematics 2024, 12(16), 2468; https://doi.org/10.3390/math12162468 - 9 Aug 2024
Cited by 3 | Viewed by 936
Abstract
With the rapid development of e-commerce, the online channels encroaching on the offline sales market are becoming more serious, which will definitely harm the offline market. Moreover, there exists a certain percentage of consumers (mostly elderly people) who are not able to purchase [...] Read more.
With the rapid development of e-commerce, the online channels encroaching on the offline sales market are becoming more serious, which will definitely harm the offline market. Moreover, there exists a certain percentage of consumers (mostly elderly people) who are not able to purchase online because they lack digital skills. Therefore, understanding the impact of the purchase channel preference and service level on pricing decisions is vital for the dual-channel supply chain management. Focusing on the channel preference and service level, we first develop an optimal pricing model containing centralized and decentralized decision-making for an online and offline retailer by deploying the Stackelberg game. We first develop a Stackleberg game to capture such a dual-channel supply chain with the offline channel preference and service level. Secondly, under centralized decision-making, we derive the optimal retail prices and obtain the optimal total profit. Thirdly, under decentralized decision-making, we obtain the optimal retail prices and optimal total profit as well. Moreover, extensive monotonicity properties when system parameters change are obtained. Relying on the theoretical results, firstly, we show that the improvement of the offline service level would lead to higher pricing of the commodities for both online and offline channels. From our numerical results, when the service level is improved, the offline and online optimal pricing increases by 47.5% and 31.1%, respectively, which may contradict the conventional belief that the improvement of one channel would harm another one. Secondly, we demonstrate that the benefit of improving the offline service level has a diminishing marginal effect. The numerical results show that when the current service level is low, the effectives of improving the service level is roughly five times that when the service level is high. This indicates that the investment in improving the offline service level should not be unlimited. Thirdly, we show that the pricing decision under centralized decision-making should be adopted with the existence of both the offline channel preference and offline service. Full article
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22 pages, 14203 KiB  
Article
Evaluating the Implementation of Ecological Control Line Planning (ECLP): A Case Study of Wuhan Metropolitan Development Zone
by Chun Li, Huihui Yang, Zhiyong Wang and Shuiyu Yan
Land 2024, 13(7), 926; https://doi.org/10.3390/land13070926 - 26 Jun 2024
Cited by 2 | Viewed by 1702
Abstract
China’s unprecedented rapid urbanization has encroached upon ecologically sensitive areas. Since 2013, Wuhan, a central urban hub in China, has adopted Ecological Control Line Planning (ECLP) to regulate urban growth and preserve ecological integrity. This study evaluates how ECLP is implemented in the [...] Read more.
China’s unprecedented rapid urbanization has encroached upon ecologically sensitive areas. Since 2013, Wuhan, a central urban hub in China, has adopted Ecological Control Line Planning (ECLP) to regulate urban growth and preserve ecological integrity. This study evaluates how ECLP is implemented in the Wuhan Metropolitan Development Zone (WMDZ), a critical region for harmonizing urban expansion with ecological preservation. The assessment integrates two fundamental aspects—conformity and utilization—with evaluations across spatial and ecological dimensions. This methodology builds a technical framework for rapid identification and detailed analysis of planning effects through LULC statistics and landscape connectivity index monitoring. The findings reveal that the ECLP is spatially conformable and utilizable, successfully curbing urban expansion and channeling development towards the urban growth boundary (UGB) and ecological development area (EDA). However, ECLP has not significantly mitigated the decline in ecological connectivity. Details include the following: (1) The general spatial consistency of the ECLP was 88.53%, with the EDA and ecological baseline area (EBA) achieving 85.18% and 88.98%, respectively. (2) Most of the increase in impervious land within ecological lines originated from agricultural and water areas, with only 7.02 km2 of land transitioning to non-agricultural and non-ecological uses. (3) The integral index of connectivity (IIC) exhibited a more rapid deterioration post-ECLP implementation, suggesting the disruption or degradation of critical connectivity pathways or patches within the ecological network. (4) Core ecological patches experienced significant losses inside and outside the UGB, with losses within the UGB being 2.51 times greater. The findings underscore the importance of ecological connectivity in implementing ecological space protection planning and the need for the flexible governance of areas where protection and development conflicts arise. Full article
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28 pages, 1203 KiB  
Article
Impact of Capital Position and Financing Strategies on Encroachment in Supply Chain Dynamics
by Qiuying Zhu, Ce Wang and Bin Zhang
Mathematics 2024, 12(12), 1830; https://doi.org/10.3390/math12121830 - 12 Jun 2024
Cited by 1 | Viewed by 945
Abstract
Channel encroachment and financing decisions are prevalent in practice. Utilizing the Stackelberg game framework, we investigate the impact of a retailer’s capital position and financing strategies on supply chain dynamics in which a supplier considers establishing a direct sales channel. We find that [...] Read more.
Channel encroachment and financing decisions are prevalent in practice. Utilizing the Stackelberg game framework, we investigate the impact of a retailer’s capital position and financing strategies on supply chain dynamics in which a supplier considers establishing a direct sales channel. We find that the retailer’s equilibrium financing strategy is impacted by demand volatility and the initial working capital. The supplier’s encroachment decision hinges on the entry cost when neither trade credit financing nor bank credit financing is available. When both types of credit are available, the choice of financing is a complex interplay involving initial working capital, entry cost, and demand volatility. Notably, the supplier’s decision to encroach may shift from a binary stance of either encroaching or not encroaching, or it may oscillate from encroachment to non-encroachment and back to encroachment, particularly with an increase in demand volatility when the entry cost is moderate. The novelty of this study lies in its integration of supplier channel decisions with retailer operational decisions and financing strategies, examining how the capital position and financing strategies impact channel decisions. This study provides managerial insights into the interplay between supplier’s channel dynamics and retailer’s financial considerations, shedding light on unexplored aspects of channel management. In future studies, some assumptions in this study can be modified to obtain more managerial insights. Full article
(This article belongs to the Section E5: Financial Mathematics)
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18 pages, 1318 KiB  
Article
Investment in Data Analytics with Manufacturer Encroachment
by Feifei Han and Jiao Guan
Mathematics 2024, 12(9), 1371; https://doi.org/10.3390/math12091371 - 30 Apr 2024
Viewed by 1385
Abstract
Online retail platforms such as Amazon and Tmall have the ability to create personalized recommendations based on the consumer’s browsing history, purchase history, and preferences by investing in data analytics capability. In practice, manufacturers may encroach on the retail market through the agency [...] Read more.
Online retail platforms such as Amazon and Tmall have the ability to create personalized recommendations based on the consumer’s browsing history, purchase history, and preferences by investing in data analytics capability. In practice, manufacturers may encroach on the retail market through the agency channel that sells products directly to online consumers in addition to wholesale products to retail platforms through the reselling channel. In this study, we develop a game-theoretic model to study the interplay between the manufacturer’s encroachment and the online retail platform’s data analytics capability investment. Our outcomes reveal that the conditions for the manufacturer to encroach become more lenient if the platform invests in data analytics capability, and we show that the investment in data analytics capability can lead to a Pareto improvement and the manufacturer can free ride on the platform’s investment. Moreover, we found that the manufacturer’s encroachment always creates more incentives for the platform to enhance the investment level in data analytics capability. Our research in this study provides useful insights for managers to make encroachment decisions and data analytics capability investment decisions with the manufacturer who sells through the online retail platform. Full article
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17 pages, 3716 KiB  
Article
Manufacturer Encroachment Strategic Analysis with Platform Service Inputs: An Agent-Based Scenario
by Guihua Lin, Jiayu Zhang and Qi Zhang
Systems 2024, 12(2), 64; https://doi.org/10.3390/systems12020064 - 19 Feb 2024
Cited by 1 | Viewed by 2144
Abstract
This paper considers the agency selling channel in a supply chain under platform service investment. We construct Stackelberg game models to study the impact of the manufacturer’s encroachment strategy on supply chain members. Research results indicate that the encroachment strategy always has a [...] Read more.
This paper considers the agency selling channel in a supply chain under platform service investment. We construct Stackelberg game models to study the impact of the manufacturer’s encroachment strategy on supply chain members. Research results indicate that the encroachment strategy always has a positive impact at the levels of the manufacturer and platform service, which should dynamically change in response to the manufacturer’s action; the platform may actively implement a service strategy without encroachment, while the platform should be cautious in providing services to avoid backlash when encroachment occurs; the high commission rate may prompt the platform to increase the service effort and hinder manufacturer encroachment; when the channel substitution rate is high, both the manufacturer and platform may suffer from it and hence they should slow down their strategy implementation and consider cooperation; when the elasticity coefficient is large and the service cost is high, it may hinder the platform from providing services and the manufacturer may take the opportunity to encroach and thus seize the market. Full article
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27 pages, 1078 KiB  
Article
Emission Reduction and Channel Decisions in a Two-Echelon Supply Chain Considering Service Spillovers
by Xiaoxu Chen, Jingwei Wang, Peng Xu, Thomas Walker and Guoqiang Yang
Mathematics 2023, 11(21), 4423; https://doi.org/10.3390/math11214423 - 25 Oct 2023
Cited by 1 | Viewed by 1346
Abstract
The development of e-commerce and the green economy has prompted suppliers of green products to introduce internet channels by which products are directly sold to consumers. However, the emergence of “price wars” and “free riding” between the two channels after the introduction of [...] Read more.
The development of e-commerce and the green economy has prompted suppliers of green products to introduce internet channels by which products are directly sold to consumers. However, the emergence of “price wars” and “free riding” between the two channels after the introduction of online channels may affect the stability of the green supply chain. This paper uses optimization theory to investigate the impact of service spillover effects and different channel structures on the optimal decision of supply chain members in a Stackelberg game. By comparing the equilibrium outcomes of the single-channel and dual-channel supply chain in a setting with and without retail services, we observe that the supplier prefers to encroach on the market when services that retail locations provide largely spillover to and benefit the direct sales channel. Contrary to popular belief, a higher degree of service spillovers is beneficial for the retailer to achieve more returns under the dual-channel structure, whereas supplier encroachment will lead to a decline in the service level if the spillover degree is relatively low. In addition, the emission reduction level of products under supplier encroachment is always higher than that employed in the single-channel structure if consumers have both low-carbon preference and a high degree of service sensitivity. Finally, we expand our discussion by introducing the carbon cap-and-trade (CCT) mechanism to compare the conditions for achieving Pareto improvement under supplier encroachment. These results can provide helpful insights for decision-makers in supply chain management to implement effective channel selection and achieve sustainable development. Full article
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22 pages, 1114 KiB  
Article
How to Distribute Green Products in Competition with Brown Products? Direct Selling versus Agent Selling?
by Hanli Hu, Yu Cao, Dan Yi and Qingsong Li
Sustainability 2023, 15(14), 10961; https://doi.org/10.3390/su151410961 - 13 Jul 2023
Cited by 1 | Viewed by 2914
Abstract
In order to respond to and take advantage of consumers’ growing interest in green products, an increasing number of firms are expanding their market share by introducing green versions of their brown products. However, firms are faced with the challenge of how to [...] Read more.
In order to respond to and take advantage of consumers’ growing interest in green products, an increasing number of firms are expanding their market share by introducing green versions of their brown products. However, firms are faced with the challenge of how to distribute green products to avoid mutual encroachment with brown products. To solve this problem, this paper constructs a Stackelberg game model consisting of a manufacturer (leader) and a retailer (follower), in which the manufacturer provides brown and green products, and then develops two channel structures for green products to be sold through the manufacturer (direct selling) and the retailer (agent selling). The results show that the manufacturer’s choice of green product distribution channels is affected by the direct selling costs and the market share of green consumers and their product preferences. When the direct selling cost is zero or consumers are green, the manufacturer always chooses direct selling. However, with an increase in the direct selling costs, if green consumers have a large difference in their preference for green and brown products, the manufacturer chooses agent selling, and vice versa. In particular, the impact of the market share of green consumers on the profits of the manufacturer is different in the two channel structures. The higher the market share of green consumers under agent selling, the more beneficial it is for the manufacturer. However, under direct selling, the profits of the manufacturer show an “inverted U” trend with the increase in the market share of green consumers. In addition, under certain conditions, the direct selling channels opened by the manufacturer are not necessarily to sell green products, but to maximize the market share of brown products. The strategy is to set high prices for green products in direct selling channels to stimulate consumers to buy brown products. These findings can provide insights for manufacturers to design appropriate green product distribution strategies. Full article
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12 pages, 2505 KiB  
Article
Assessing Urban Flooding Extent of the Baunia Khal Watershed in Dhaka, Bangladesh
by Zarin Subah, Sujit Kumar Bala and Jae Hyeon Ryu
Water 2023, 15(6), 1183; https://doi.org/10.3390/w15061183 - 18 Mar 2023
Cited by 4 | Viewed by 3669
Abstract
Due to the gradual encroachment of natural drainage channels (also known as khals) and the poor management of drainage infrastructures, any rainfall of higher intensity for a few hours causes urban flooding in Dhaka, Bangladesh, hindering the daily lives of city dwellers, especially [...] Read more.
Due to the gradual encroachment of natural drainage channels (also known as khals) and the poor management of drainage infrastructures, any rainfall of higher intensity for a few hours causes urban flooding in Dhaka, Bangladesh, hindering the daily lives of city dwellers, especially in slum areas. The Intensity–Duration–Frequency (IDF) curves with return intervals of 2, 5, 10, 25, 50, and 100 years were estimated for a 3 h duration of rainfall using the Gumbel statistical method to assess urban flooding extent around the Baganbari slum within the Baunia Khal watershed. The spatial land use changes of the Baunia Khal were also delineated through the analysis of the areal changes of the khal from 2004 to 2020. The area of the khal was found to be 7.00 km2, 2.17 km2 and 0.41 km2 for the years 2004, 2010, and 2020, respectively. It appears that a gradual massive areal decrease of the khal (impervious land segment) was in progress during this period for high encroachments driven by various governmental agencies and other private entities’ urban developmental projects. The runoff coefficient was computed as 0.76 based on the existing land use pattern, slope, and soil type of the study area. The average runoff generated from the catchment was estimated using the rational method and was 103.41 m3/hr. The drainage length was calculated as 9.1 km using the Kirpich method, whereas the present drainage length was reported as only 6.95 km. The multiple rainfall intensities with return periods of 2, 5, 10, 25, 50, and 100 years were also applied to replicate a heightened extent of urban flooding in the Baunia Khal watershed. The study suggests that the depth, length and width of the Baunia Khal need to increase to hold the generated runoff to manage urban flooding around the Baunia Khal watershed. Full article
(This article belongs to the Section Urban Water Management)
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