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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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Constructed Wetlands: Enhancing Contaminant Removal and Remediation
edited by and
submission deadline 31 Oct 2025 | 1 articles | Viewed by 698 | 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)
Water Quality Engineering and Wastewater Treatment, 4th Edition submission deadline 31 Oct 2025 | Viewed by 691 | 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)
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 512 | 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 406 | 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 203 | 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 155 | 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 128 | 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 105 | 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 1615 | 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 4570 | 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 358 | 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 81 | 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 975 | 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 3269 | 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 | 3 articles | Viewed by 1320 | 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 259 | 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 98 | 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 11312 | 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 9354 | 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 5796 | 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)
Applications of Remote Sensing and GISs in River Basin Ecosystems
edited by Jiren Xu, , and
submission deadline 20 Nov 2025 | 6 articles | Viewed by 4743 | 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)
Energy Recovery and Clean Water: Techno-Economic and Environmental Assessment submission deadline 20 Nov 2025 | 4 articles | Viewed by 4597 | 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 4425 | Submission Open
Keywords: hydrogeology; hydrochemistry; geochemistry; groundwater; aquifer; hydrothermal systems; energy applications; groundwater legislation and management
(This special issue belongs to the Section Hydrogeology)
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 3558 | 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 3371 | 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 2752 | 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 2117 | 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)
Applications of Nanozymes and Other Nanomaterials in the Water Environment: Latest Advances and Prospects
edited by
submission deadline 20 Nov 2025 | 1 articles | Viewed by 1952 | Submission Open
Keywords: nanomaterials; nanozyme; pollutant degradation; pollutant detection; water treatment processes
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Advances in Sustainable Management of Contaminated Stormwater
edited by
submission deadline 20 Nov 2025 | 1 articles | Viewed by 1029 | Submission Open
Keywords: stormwater management; commercial areas contamination; traffic contamination; agriculture pollutants; stormwater treatment; urban drainage; water quality
(This special issue belongs to the Section Water Quality and Contamination)
Groundwater Environmental Impacts and Control Strategies of Coal Mining and Energy Development/Storage Activities
edited by , Lijun Liu and Jingwei Huang
submission deadline 20 Nov 2025 | 1 articles | Viewed by 567 | Submission Open
Keywords: aquifer-protected coal mining; water conservation mining technology; sustainable development of geothermal energy; aquifer gas/thermal storage; underground water/gas/thermal reservoir in mine goaf; evolution of groundwater dynamic fields; recycling technology and pollution control of mine water; dynamic monitoring and remediation of groundwater; coupled flow in fractured porous media; rock mechanics under THMC multi-field coupling; fracture initiation and propagation; low-carbon treatment and resource utilization of mine water
(This special issue belongs to the Section Hydrogeology)
Algae Distribution, Risk, and Prediction
edited by
submission deadline 20 Nov 2025 | 1 articles | Viewed by 537 | Submission Open
Keywords: algae; biodiversity; spatiotemporal distribution; risk; management
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Application of Advanced Oxidation Processes (AOPs) for Wastewater Treatment
edited by , and Zhihui Zhang
submission deadline 20 Nov 2025 | 1 articles | Viewed by 518 | Submission Open
Keywords: advanced oxidation processes (AOPs); hybrid AOP technologies; wastewater treatment; photocatalysis; electrocatalysis; Fenton reactions; ozonation; reactive oxygen species (ROS); emerging contaminants; contaminant degradation
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Coupled Numerical Modeling of Groundwater Flow and Surface Water Interactions submission deadline 20 Nov 2025 | 1 articles | Viewed by 357 | Submission Open
Keywords: numerical modeling; aquifer characterization; hydrogeology; hydrochemistry; groundwater hydrology; groundwater flow; solute (reactive) transport; surface water and groundwater interactions
(This special issue belongs to the Section Hydrogeology)
Sustainable Nutrients Management Strategies to Reduce Nutrients Pollution Along the Landscape-River-Sea Systems
edited by , Josue González Camejo and Laura Díaz-Guerra
submission deadline 20 Nov 2025 | Viewed by 284 | Submission Open
Keywords: nutrients; pollution; soil; rivers; sea; wastewaters; agricultural practices; environmental technologies; sustainability; circularity
(This special issue belongs to the Section Soil and Water)
Isotope Hydrology: Tracing Water’s Journey and Water–Rock Interactions in a Changing World
edited by , , Xianjun Xie, Zhongyin Cai, Jinlong Zhou and
submission deadline 20 Nov 2025 | Viewed by 208 | Submission Open
Keywords: isotope hydrology; water– rock– gas interaction; surface water– groundwater interaction; groundwater recharge; fate of nutrients (S-N-C-P); groundwater age dating; water contamination tracing; water quality; atmospheric water cycle; paleoclimate; geothermal resources; CCUS (carbon capture; utilization; and storage)
(This special issue belongs to the Section Hydrology)
Resilient Rivers: Integrating Nature-Based Solutions with Hydraulic Engineering
edited by and
submission deadline 20 Nov 2025 | Viewed by 164 | Submission Open
Keywords: Nature-based Solutions (NbS); hydraulic engineering; eco-hydraulics; river resilience; flood mitigation; sediment transport; erosion control; green infrastructure; river restoration; hydrodynamic modeling; climate adaptation; water quality; ecosystem services; sustainable river management; river rewilding
(This special issue belongs to the Section Water Erosion and Sediment Transport)
Pesticides in Water and Health
edited by and Wenjun Zhang
submission deadline 20 Nov 2025 | Viewed by 116 | Submission Open
Keywords: pesticide; bioaccumulation; toxicological assessment; health risk assessment; in vitro; in vivo
(This special issue belongs to the Section Water and One Health)
Climate Change Impacts on Water Resources and Ecosystem Dynamics in Mountainous and Cold-Region Ecosystems
edited by Terry V. Callaghan CMG
submission deadline 20 Nov 2025 | Viewed by 110 | Submission Open
Keywords: water resources and water use; biodiversity; climate changes; cold regions; mountainous regions; ecosystems; ecosystem services and feedback; human impact; population
(This special issue belongs to the Section Ecohydrology)
Water Resources and Environment Management in Watersheds with Intensive Human Activities
edited by and
submission deadline 20 Nov 2025 | Viewed by 108 | Submission Open
Keywords: water resources; water environment; sustainable management; human activities; influencing factors
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Engineered Nanoporous Sorbents for Removing Emerging Pollutants from Aqueous Environments
edited by Jian Shen
submission deadline 20 Nov 2025 | Viewed by 58 | Submission Open
Keywords: nanoporous sorbents; engineering strategies; emerging pollutants; adsorption; water purification
(This special issue belongs to the Section Water Quality and Contamination)
Engineering Hydrogeology Research Related to Mining Activities, 2nd Edition
edited by Wei Qiao and Bo Li
submission deadline 20 Nov 2025 | Viewed by 57 | Submission Open
Keywords: mechanism of water inrush; prediction of mine water hazard; intelligent warning and monitor of mine water hazard; mine water injection and storage; mine water reinjection and geological storage; mine inflow; evolution of groundwater flow field; water inrush from separate layer; research on rock dynamics with fluid– structure coupling
(This special issue belongs to the Section Hydrogeology)
Impact of Biochar Additions on Soil Hydraulic Properties
edited by Peizhen Zhang
submission deadline 20 Nov 2025 | Viewed by 33 | Submission Open
Keywords: soil hydraulic properties; biochar characteristic; soil water retention; water-saving irrigation; soil pore characteristics
(This special issue belongs to the Section Soil and Water)
Implementation of Biodiversity and Ecosystem Services in Marine Ecosystem Management, 3rd Edition
edited by
submission deadline 25 Nov 2025 | 6 articles | Viewed by 7542 | Submission Open
Keywords: ecosystem services; marine biodiversity; marine environment management; mesophotic environment; carbon sink; fishery and marine food; new marine based tourism; climate history; marine litter
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Impact of Climate Change on Marine Ecosystems submission deadline 25 Nov 2025 | 2 articles | Viewed by 4038 | Submission Open
Keywords: biodiversity and ecosystem functioning; global change; marine pollution; fisheries and food security
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Treatment and Resource Utilization of Urban Sewage Sludge
edited by , Yan Li and Xiaoyong Yang
submission deadline 25 Nov 2025 | 2 articles | Viewed by 1702 | Submission Open
Keywords: urban sewage sludge; treatment technologies; resource utilization; environmental impact; anaerobic digestion; composting; incineration; land application; circular economy; sustainable management
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Applications of Remote Sensing in Hydrology and Water Resource Management
edited by
submission deadline 25 Nov 2025 | 1 articles | Viewed by 1178 | Submission Open
Keywords: hydrological remote sensing; water resource monitoring; satellite hydrology; soil moisture detection; precipitation estimation; flood mapping; drought assessment; multi-sensor integration; machine learning in hydrology; wetlands/lakes dynamics
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Advancing Data-Driven Approaches in Landscape Hydrology: Innovations and Applications submission deadline 25 Nov 2025 | 1 articles | Viewed by 941 | Submission Open
Keywords: data-driven hydrology; machine learning in hydrology; hydroinformatics; climate change adaptation; nature-based solutions; GIS-based hydrological modeling; flood and drought mitigation; sustainable water management
(This special issue belongs to the Section Urban Water Management)
Rainfall-Induced Landslides: Influencing, Modelling and Hazard Assessment: 2nd Edition
edited by and Danyi Shen
submission deadline 25 Nov 2025 | 1 articles | Viewed by 790 | Submission Open
Keywords: rainfall; landslides; causes; modelling; hazard assessment
(This special issue belongs to the Section Water Erosion and Sediment Transport)
Wetland Water Quality Monitoring and Assessment
edited by and Tianxiang Wang
submission deadline 25 Nov 2025 | 1 articles | Viewed by 687 | Submission Open
Keywords: water quality; monitoring and assessment; aquatic ecosystems; model; sustainability; machine learning      
(This special issue belongs to the Section Water Quality and Contamination)
Development of New Wastewater Treatments for the Efficient Removal of Micropollutants submission deadline 25 Nov 2025 | 1 articles | Viewed by 445 | Submission Open
Keywords: circular management of water; ecotoxicity; emerging concern contaminants; environmental monitoring; life cycle assessment; quaternary treatments; reuse of treated wastewater; sustainable treatment processes
(This special issue belongs to the Section Wastewater Treatment and Reuse)
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