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Water publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Methods and Tools for Sustainable Agricultural Water Management
edited by Hui Yang, Manoj K. Shukla and
submission deadline 25 Oct 2025 | 7 articles | Viewed by 8458 | Submission Open
Keywords: crop water relations; water productivity; deficit/salinity irrigation; conservation agriculture; regional water management
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Contaminants of Emerging Concern in Soil and Water Environment submission deadline 25 Oct 2025 | 3 articles | Viewed by 6409 | Submission Open
Keywords: pharmaceuticals; nanomaterials; personal care products; hormones; flame retardants; plasticizers; per- and polyfluoroalkyl substances (PFASs); microplastics; abiotic compartments
(This special issue belongs to the Section Soil and Water)
Application of Biotechnology in Water Treatment and Specific Treatments for Water Reuse
edited by and Baghdad Ouddane
submission deadline 25 Oct 2025 | 3 articles | Viewed by 4689 | Submission Open
Keywords: biotechnology; water treatment; secondary treatment; organic micropollutant; metallic trace element; activated sludge; biological treatment; nature-based solutions; constructed wetlands and biofiltration systems
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Remote Sensing in Coastal Water Environment Monitoring
edited by , and Xiuling Zuo
submission deadline 25 Oct 2025 | 3 articles | Viewed by 2585 | Submission Open
Keywords: coastal remote sensing; coastal change detection; coastal subsidence; coastal flooding; coastal geomorphology; coastal wetlands; tidal flats; coastal environmental vulnerability; coastal processes and landforms; hyperspectral remote sensing; radar remote sensing; machine learning; data fusion; climate change; human activities
(This special issue belongs to the Section Oceans and Coastal Zones)
Constructed Wetland Systems for Wastewater Treatment and Water Remediation
edited by Haiming Wu
submission deadline 25 Oct 2025 | 3 articles | Viewed by 2430 | Submission Open
Keywords: constructed wetland; domestic and municipal wastewater; micro-polluted water; emerging pollutants; water reuse; global climate change; carbon sink function; biogeochemical processes; selection of plants and substrates; ecosystem services; microbial communities; operation and management
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Application of Geospatial Information Systems and Technologies in Water Resources Management submission deadline 25 Oct 2025 | 1 articles | Viewed by 2359 | Submission Open
Keywords: water quality monitoring; watershed management; urban water management; water resources management; geospatial information systems (GIS); remote sensing; climate change and water resources
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Ecological Wastewater Treatment and Resource Utilization
edited by and Jingke Song
submission deadline 25 Oct 2025 | 3 articles | Viewed by 2009 | Submission Open
Keywords: ecological wastewater treatment; resource utilization; plant restoration; microorganism transformation; adsorption
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Application of Various Hydrological Modeling Techniques and Methods in River Basin Management, 2nd Edition
edited by Ankur Srivastava, and
submission deadline 25 Oct 2025 | 3 articles | Viewed by 1690 | Submission Open
Keywords: freshwater; hydrological model; machine learning; streamflow; evapotranspiration; soil moisture; remote sensing; land use/land cover change; drought; flood; crop water requirement; irrigation
(This special issue belongs to the Section Hydrology)
Innovative Approaches in Flood Forecasting and Modeling for Risk Mitigation
edited by Daniela Gogoase Nistoran
submission deadline 25 Oct 2025 | 1 articles | Viewed by 1448 | Submission Open
Keywords: hydrological and hydraulic models; data driven models; flood mapping; urban floods; climate change; remote sensing; flood forecasting; flood risk
(This special issue belongs to the Section Hydrology)
Aquatic Microplastic Pollution: Occurrence and Removal
edited by
submission deadline 25 Oct 2025 | 1 articles | Viewed by 956 | Submission Open
Keywords: microplastic pollution; environmental fate; removal technologies; wastewater treatment; biodegradation; risk assessment; mitigation strategies; plastic waste management; polymer degradation; policy and regulation
(This special issue belongs to the Section Water Quality and Contamination)
Water Quality Monitoring and Prediction Using New Sensors, Machine Learning and Big Data
edited by Yong Jie Wong
submission deadline 25 Oct 2025 | 1 articles | Viewed by 545 | Submission Open
Keywords: water quality monitoring; prediction technologies; advanced sensors; machine learning; big data analytics; remote sensing; Internet of Things (IoT); environmental monitoring; water resource management
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
The Biogeochemical Behavior and Innovative Remediation of Contaminants
edited by Zhuozhi Ouyang and Yanjun Liu
submission deadline 25 Oct 2025 | 1 articles | Viewed by 539 | Submission Open
Keywords: pollutants; biogeochemical behavior; functional materials; remediation; risk assessment; ecosystems
(This special issue belongs to the Section Soil and Water)
Flood Risk Identification and Management, 2nd Edition
edited by Juan Chen
submission deadline 25 Oct 2025 | 1 articles | Viewed by 511 | Submission Open
Keywords: flood; flood management; flood control operation; risk identification; risk assessment; risk management; uncertainty
(This special issue belongs to the Section Hydrology)
Sustainable Water and Sanitation Governance: Aligning Policies, Institutions and Regulation submission deadline 25 Oct 2025 | Viewed by 141 | Submission Open
Keywords: SDG 6; water governance; PIR framework; enabling environment; policy implementation; institutional settings; water services regulation; sustainable water management
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Groundwater Flow and Contaminant Transport Modeling
edited by Xingyuan Chen
submission deadline 25 Oct 2025 | Viewed by 125 | Submission Open
Keywords: groundwater hydrology; flow and reactive transport; numerical modeling; machine learning; disturbance impacts; surface water and groundwater interactions
(This special issue belongs to the Section Hydrogeology)
Microbial Technology Applied in Wastewater Treatment
edited by and Limin Yang
submission deadline 25 Oct 2025 | Viewed by 112 | Submission Open
Keywords: wastewater; microorganism; metabolism; biotechnology; biomass valorization; agriculture; aquaculture; industry
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Flow Dynamics and Sediment Transport in Rivers and Coasts
edited by , and Jun Wang
submission deadline 30 Oct 2025 | 4 articles | Viewed by 2031 | Submission Open
Keywords: eco-hydraulics; fluvial hydraulics; local scour; riverbed deformation; sediment transport; turbulence; wave dynamics
(This special issue belongs to the Section Hydraulics and Hydrodynamics)
Advanced Adsorbent-Based Technologies for Efficient Wastewater Treatment
edited by
submission deadline 30 Oct 2025 | 1 articles | Viewed by 582 | Submission Open
Keywords: adsorption-based technologies; adsorbents; wastewater treatment; nanomaterials; emerging contaminants; regeneration and reusability
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Advances in Hydroinformatics and Geo/Statistics for Modelling and Risk Assessment of Water Systems submission deadline 30 Oct 2025 | Viewed by 160 | Submission Open
Keywords: flood modelling; river hydraulic; geometric uncertainty of flood models; water sustainability; advances in forest restoration; nature-based solutions; advanves on time series analysis; advances of geostatistics
(This special issue belongs to the Section Hydrology)
Soil Erosion Measurement Techniques and Field Experiments, 2nd Edition
edited by and
submission deadline 31 Oct 2025 | 6 articles | Viewed by 8769 | Submission Open
Keywords: soil erosion; sediment yield; erosion plot; basin; interrill erosion; rill erosion; gully erosion
(This special issue belongs to the Section Soil and Water)
Novel Methods in Wastewater and Stormwater Treatment
edited by
submission deadline 31 Oct 2025 | 4 articles | Viewed by 3108 | Submission Open
Keywords: wastewater treatment; stormwater harvesting; stormwater treatment processes; heavy metals; pollutants and contaminants; toxicity; sustainability; smart cities; constructed wetlands; managing urban stormwater; pollutant load
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Water Modeling Using Combined Machine Learning and Fieldwork Investigation
edited by , and Netra Regmi
submission deadline 31 Oct 2025 | 2 articles | Viewed by 1118 | Submission Open
Keywords: machine learning; field survey; water modeling; big data analysis; geostatistic analysis; water quality and water quantity; environmental sustainability
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Water Quality Engineering and Wastewater Treatment, 4th Edition submission deadline 31 Oct 2025 | Viewed by 686 | Submission Open
Keywords: advanced wastewater technology; onsite wastewater treatment; natural wastewater treatment system; biological treatment; physicochemical treatment; tertiary treatment; water quality; sludge treatment and disposal; energy-efficient wastewater treatment; water reuse; resource recovery; municipal wastewater; industrial wastewater; nutrient removal
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Wastewater-Based Epidemiology (WBE) Research, 2nd Edition
edited by and
submission deadline 31 Oct 2025 | 1 articles | Viewed by 669 | Submission Open
Keywords: new biomarkers for WBE; new applications of WBE; early warning of infectious disease; monitoring substances of abuse; method uncertainties; health risk assessments
(This special issue belongs to the Section Water and One Health)
Constructed Wetlands: Enhancing Contaminant Removal and Remediation
edited by and
submission deadline 31 Oct 2025 | 1 articles | Viewed by 661 | Submission Open
Keywords: removal of nutrients and refractory organic matter by constructed wetlands; development and application of novel wetland fillers or matrices; screening of aquatic plants for constructed wetlands; main problems and solutions of constructed wetland for wastewater treatment; integration of constructed wetlands and other water treatment technologies
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Dynamic Response of Water and Soil Resources in the Context of Climate Change and Human Activities
edited by Yudong Lu, Huanhuan Li and Ce Zheng
submission deadline 31 Oct 2025 | 1 articles | Viewed by 475 | Submission Open
Keywords: water and soil resources security; water– soil interactions; climate change impacts on water and soil; anthropogenic stressors to water and soil; hydrological modeling; soil degradation; pollution remediation; sustainable agriculture; ecosystem resilience; land-use change
(This special issue belongs to the Section Soil and Water)
Electrochemical Approaches to Sustainable Water Treatment: Tackling Pollution and Advancing Resource Recovery
edited by
submission deadline 31 Oct 2025 | 1 articles | Viewed by 363 | Submission Open
Keywords: electrochemical wastewater treatment; resource recovery; electrooxidation; electroreduction; heavy metal complexes; nitrate; phosphorus; electro-Fenton; PFAS; refractory organics; high salinity wastewater
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Marine Waters for Health and Well-Being
edited by and Vincent Blanckaert
submission deadline 31 Oct 2025 | Viewed by 197 | Submission Open
Keywords: seawater; marine waters; deep seawater; marine colloids; algae; cosmetics; nutraceutics; pharmaceutics; thalassotherapy; marine biotechnology
(This special issue belongs to the Section Water and One Health)
Soil–Water Interaction and Management
edited by and Zhanbin Luo
submission deadline 31 Oct 2025 | Viewed by 138 | Submission Open
Keywords: soil moisture; soil– water management; irrigation systems; drought conditions; climate change
(This special issue belongs to the Section Soil and Water)
Research on Isotope Investigations in Groundwater Studies submission deadline 31 Oct 2025 | Viewed by 125 | Submission Open
Keywords: isotope hydrology; groundwater recharge; water– rock interactions; stable and radiogenic isotopes; contaminant source tracking; groundwater age dating; climate change and groundwater; surface water– groundwater interac-tions; sustainable water management
(This special issue belongs to the Section Hydrogeology)
Environmental Adaptability and Ecological Synergy in Offshore Renewable Energy Engineering
edited by Sheng Wu, Yanhui Wang and Chongyang Xu
submission deadline 31 Oct 2025 | Viewed by 98 | Submission Open
Keywords: marine new energy engineering; offshore new energy engineering; environmental adaptability; marine ecological impacts; complex fluid dynamics; environmental monitoring
(This special issue belongs to the Section Oceans and Coastal Zones)
Pollution Mechanisms and Source Apportionment of Typical Pollutants in Aquatic Environments
edited by Qianqian Zhang
submission deadline 5 Nov 2025 | 4 articles | Viewed by 1539 | Submission Open
Keywords: rivers; lakes; and groundwater; water quality; hydrochemistry; pollution sources; sources analysis; assessment methods; isotope technology; machine learning; multivariate statistical techniques; models
(This special issue belongs to the Section Water Quality and Contamination)
Artificial Intelligence for Sustainable Management of Groundwater Resources: New Developments, Challenges and Untapped Potentials
edited by Claudia Cherubini
submission deadline 10 Nov 2025 | 3 articles | Viewed by 4228 | Submission Open
Keywords: artificial intelligence; groundwater management; groundwater heads; contaminant transport; saltwater intrusion; optimization of monitoring networks
(This special issue belongs to the Section Hydrogeology)
Digital Twin Technologies for Advanced Wastewater Treatment Operation and Control
edited by and Qadeer Akbar Sial
submission deadline 10 Nov 2025 | Viewed by 321 | Submission Open
Keywords: digital twins; water treatment; wastewater treatment; water resource recovery facility; water distribution; sewer systems; optimization; process modeling; artificial intelligence; machine learning; industrial internet of things; pre-dictive maintenance; smart water; big data
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Protection and Restoration of Lake and Water Reservoir
edited by Xiaoxiao Wang
submission deadline 10 Nov 2025 | Viewed by 75 | Submission Open
Keywords: riparian restoration; water quality; nutrient cycling; sediment management; freshwater ecosystems; climate change; sustainable management; ecological resilience
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Water and Society: Challenges for Freshwater Quality Under a Climate Change Scenario submission deadline 12 Nov 2025 | 2 articles | Viewed by 823 | Submission Open
Keywords: climate change; freshwater ecosystems; water quality; societal challenges
(This special issue belongs to the Section Water Quality and Contamination)
Coastal Engineering and Fluid–Structure Interactions
edited by and
submission deadline 15 Nov 2025 | 6 articles | Viewed by 3126 | Submission Open
Keywords: coastal engineering; wave– structure interactions; high-fidelity numerical modeling; laboratory and field experiments; mathmatical models; harbors; coastal; and offshore structures; nature-based solutions; hydrodynamics; wave loads; wave overtopping
(This special issue belongs to the Section Oceans and Coastal Zones)
Impacts of Environmental Change and Human Activities on Aquatic Ecosystems, 2nd Edition
edited by , and Qian Zhang
submission deadline 15 Nov 2025 | 2 articles | Viewed by 1154 | Submission Open
Keywords: aquatic ecosystems; migration and transformation; source identification; risk assessment; sustainable development
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Revolutionizing Hydraulic Fracturing with Machine Learning and Data-Driven Approaches
edited by , Huiying Tang and Junchao Li
submission deadline 15 Nov 2025 | Viewed by 256 | Submission Open
Keywords: hydraulic fracturing; machine learning; data-driven; geomechanics; fluid flow; modeling and simulation; optimization
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Saline Water Irrigation and the Impact of Salt Stresses on Plants
edited by
submission deadline 15 Nov 2025 | Viewed by 94 | Submission Open
Keywords: saline irrigation; salt tolerance; crop yield; irrigation techniques; soil amendments; halophytic plants; microbial in-oculants; remote sensing; precision irrigation; plant resilience
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Risks of Hydrometeorological Extremes
edited by and Kazeem Abiodun Ishola
submission deadline 20 Nov 2025 | 5 articles | Viewed by 10724 | Submission Open
Keywords: hydrometeorological extremes and impacts; climate change; flood risk assessment; drought mitigation; extreme weather events; hydrological modelling; climate models and projections; climate resilience; forecasting techniques including the use of artificial intelligence; risk management; adaptive strategies
(This special issue belongs to the Section Water and Climate Change)
Groundwater Quality and Contamination at Regional Scales submission deadline 20 Nov 2025 | 6 articles | Viewed by 9055 | Submission Open
Keywords: groundwater quality; groundwater contamination; human activities; land use; assessment of groundwater quality; natural background levels; evaluation of groundwater contamination; geostatistical techniques
(This special issue belongs to the Section Hydrogeology)
Research on Microplastic Pollution in Water and Soil Environment
edited by and Taoze Liu
submission deadline 20 Nov 2025 | 2 articles | Viewed by 5544 | Submission Open
Keywords: microplastic detection; microplastic abundance; plastic additives composition; ecolog-ical risk; environmental risk; water and soil environment
(This special issue belongs to the Section Soil and Water)
Energy Recovery and Clean Water: Techno-Economic and Environmental Assessment submission deadline 20 Nov 2025 | 4 articles | Viewed by 4414 | Submission Open
Keywords: water– energy nexus; energy policy; water governance; water quality; groundwater and matter flow modelling; groundwater irrigation; solar powered pumps; wastewater treatment; water– energy– food nexus; water distribution systems; GIS and remote sensing; artificial intelligence; climate change
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Research on Hydrogeology and Hydrochemistry: Challenges and Prospects submission deadline 20 Nov 2025 | 4 articles | Viewed by 4095 | Submission Open
Keywords: hydrogeology; hydrochemistry; geochemistry; groundwater; aquifer; hydrothermal systems; energy applications; groundwater legislation and management
(This special issue belongs to the Section Hydrogeology)
Applications of Remote Sensing and GISs in River Basin Ecosystems
edited by Jiren Xu, , and
submission deadline 20 Nov 2025 | 5 articles | Viewed by 4001 | Submission Open
Keywords: remote sensing; GISs; river basin ecosystems; water quality monitoring; land use and land cover change; hydrological processes; ecosystem dynamics; environmental conservation; spatial analysis; sustainable management
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Research Status of Operation and Management of Hydropower Station
edited by Dong Liu and Yanhe Xu
submission deadline 20 Nov 2025 | 4 articles | Viewed by 3485 | Submission Open
Keywords: conventional hydropower stations; cascade hydropower stations; pumped storage power stations; non-linear modelling; combined operation; optimal control; multi-energy systems; stability analysis; new power systems; performance evaluation; fault diagnosis; trend prediction and early warning; renewable energy; artificial intelligence; optimization algorithms
(This special issue belongs to the Section Hydraulics and Hydrodynamics)
Advances in Management and Optimization of Urban Water Networks
edited by , , Mohsen Shahandashti and Milad Latifi
submission deadline 20 Nov 2025 | 4 articles | Viewed by 3158 | Submission Open
Keywords: water distribution; urban drainage; stormwater networks; sewer networks; optimization; resilience; sustainable management; water quality; critical infrastructure; technological innovations
(This special issue belongs to the Section Urban Water Management)
Geochemistry and Removal of Heavy Metals and Other Pollutants in Water
edited by and
submission deadline 20 Nov 2025 | 3 articles | Viewed by 2655 | Submission Open
Keywords: geochemistry; heavy metals; water pollution; remediation techniques; water treatment; environmental impact; ecosystem health
(This special issue belongs to the Section Water Quality and Contamination)
Application of Numerical Modeling in Estuarine and Coastal Dynamics
edited by Hongyi Zhao, and
submission deadline 20 Nov 2025 | 2 articles | Viewed by 2067 | Submission Open
Keywords: coastal modeling; ocean hydrodynamics model; shelf sea hydrodynamics model; local scour and protection; fluid– soil– structure interaction; solute transport in marine sediments; neural network models
(This special issue belongs to the Section Hydraulics and Hydrodynamics)
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