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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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Advanced Perspectives on the Water–Energy–Food Nexus
edited by Qiong Yue, , Mengyang Wu and
submission deadline 25 Jul 2026 | 3 articles | Viewed by 4360 | Submission Open
Keywords: water– energy– food nexus; integrated management; cross-sectoral policy; climate resilience; cascading risk
(This special issue belongs to the Section Water-Energy Nexus)
Microplastics in the Marine Environment: Distribution and Effects submission deadline 25 Jul 2026 | Viewed by 123 | Submission Open
Keywords: microplastics; marine pollution; ecotoxicology; environmental fate; trophic transfer
(This special issue belongs to the Section Oceans and Coastal Zones)
Application of Remote Sensing and GIS in Water Resources submission deadline 25 Jul 2026 | Viewed by 114 | Submission Open
Keywords: GIS; remote sensing; hydrology; satellite; drone; surface water; groundwater; cryosphere; flood; drought; rainfall-runoff; water quality; irrigation
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Water Quality Studies: Assessing the Presence of Nutrients and Pollutants, 2nd Edition
edited by and Joanna Potapowicz
submission deadline 25 Jul 2026 | Viewed by 52 | Submission Open
Keywords: transboundary pollutants; persistent compounds; bioaccumulative chemicals; toxic contaminants; trace elements; major ions; organic compounds; catchment; freshwater; runoff and discharge; climate change impact
(This special issue belongs to the Section Water Quality and Contamination)
Advancing Understanding of Extreme Precipitation in a Changing Climate: Processes, Predictability, and Risk
edited by Lei Yan
submission deadline 25 Jul 2026 | Viewed by 37 | Submission Open
Keywords: climate change; extreme precipitation; risk analysis; nonstationarity; climate teleconnections; predictability
(This special issue belongs to the Section Water and Climate Change)
Impacts of Environmental Stressors on Benthic Community in Aquatic Ecosystems
edited by
submission deadline 25 Jul 2026 | Viewed by 35 | Submission Open
Keywords: benthic communities; environmental impact; climate change; anthropogenic pressures; benthic biodiversity; ecosystem functioning; marine ecosystems; freshwater ecosystems
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Hillslope Hydrology and Slope Stability: A Nature-Based Solution (NBS) Approach submission deadline 25 Jul 2026 | Viewed by 29 | Submission Open
Keywords: landslide hazard; hillslope hydrology; slope stability; nature-based solutions; ecological engineering
(This special issue belongs to the Section Hydrogeology)
Advanced Technology in Agricultural Water-Saving Irrigation
edited by Weihua Guo and Jintao Wang
submission deadline 25 Jul 2026 | Viewed by 22 | Submission Open
Keywords: smart irrigation; water-saving technology; precision irrigation; AI-driven models; sustainable agriculture
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Advances in Water Cycle Management and Circular Economy
edited by Alessandro Moretti and
submission deadline 25 Jul 2026 | Submission Open
Keywords: fit-for-purpose water reuse; wastewater valorization; advanced and hybrid treatment technologies; AI-driven and real-time process controls; regulatory frameworks; multi-resource recovery facilities; climate-resilient water management; water reuse acceptance; innovative water strategies
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Application of Nanomaterials in Soil and Aquatic Environment Remediation submission deadline 26 Jul 2026 | 1 articles | Viewed by 650 | Submission Open
Keywords: sustainable nanomaterials; wastewater treatment; soil remediation; degradation mechanisms; sustainability assessment; characterisation of NMs; adsorption; advanced oxidation process (AOPs); fate of NMs; photocatalyst
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Advances in Rural and Agricultural Wastewater Treatment submission deadline 30 Jul 2026 | Viewed by 50 | Submission Open
Keywords: decentralized wastewater; onsite wastewater; biological treatment; physicochemical treatment; nutrient removal; agri-cultural wastewater; agricultural runoff
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Hydroclimate Risk Assessment and Management: Data, Models and Remote Sensing Approaches
edited by Md Shahid Latif, and
submission deadline 30 Jul 2026 | Viewed by 42 | Submission Open
Keywords: hydroclimate risk and extremes; climate change; CMIP5/CMIP6 and regional projections; remote sensing; reanalysis and in situ observations; hydrological; hydraulic; groundwater and socio-hydrological modelling; floods; droughts; heatwaves; wildfires and compound events; downscaling; bias adjustment and data assimilation; machine learning; deep learning and hybrid modelling; multi-hazard impact modelling and climate services; water– energy– food– ecosystem nexus; adaptation; resilience and decision-support systems; AI applications in improving hydroclimato-logical forecasting; flood; drought; water quality assessment
(This special issue belongs to the Section Hydrology)
Development and Application of Global Hydrological Models
edited by Wei Qi, , and Tianyuan Zhang
submission deadline 31 Jul 2026 | Viewed by 65 | Submission Open
Keywords: global hydrological models (GHMs); flood risk; terrestrial water cycle; large-scale hydrology; water resources assessment; climate change impacts; human– water interactions; earth system modeling; hydrological extremes; global water scarcity; model development and validation
(This special issue belongs to the Section Hydrology)
Research Status of Operation and Management of Hydropower Station, 2nd Edition
edited by and Yanhe Xu
submission deadline 31 Jul 2026 | Viewed by 65 | Submission Open
Keywords: conventional hydropower stations; cascade hydropower stations; pumped storage power stations; nonlinear modelling; combined operation; optimal control; multienergy 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)
Applications of Artificial Intelligence (AI) in Water Resources System, 2nd Edition
edited by
submission deadline 31 Jul 2026 | Viewed by 61 | Submission Open
Keywords: water resources systems; artificial intelligence; modeling; optimization; water distribution systems
(This special issue belongs to the Section Urban Water Management)
The Sources, Biological Factors and Migration Mechanisms of Metals and Metalloids in Aquatic Environments submission deadline 31 Jul 2026 | Viewed by 57 | Submission Open
Keywords: trace elements; pollution; metal bioavailability; health risk; climate change; marine currents; mineral deposits ecotoxicology
(This special issue belongs to the Section Water Quality and Contamination)
Hydrothermal Biomass Processing for Energy and Water Recovery
edited by Yong Wei Tiong
submission deadline 31 Jul 2026 | Viewed by 42 | Submission Open
Keywords: hydrothermal liquefaction (HTL); hydrothermal carbonization (HTC); wet biomass conversion; bio-oil and hydrochar production; aqueous phase valorisation; reactor design and process optimization; water and nutrient recovery; techno-economic analysis (TEA); life-cycle assessment (LCA); circular bioeconomy; waste-to-energy and waste-to-resource
(This special issue belongs to the Section Water-Energy Nexus)
Fluid Mechanics in Ocean Engineering: Modeling and Simulation
edited by Muhammad Hameed
submission deadline 31 Jul 2026 | Viewed by 34 | Submission Open
Keywords: ocean engineering; numerical simulation; computational fluid dynamics (CFD); hydrodynamic modeling; fluid– structure interaction; wave– current interaction; multiphase flow modeling; turbulence modeling; high-fidelity simulation; coastal and ocean processes; sediment transport; marine renewable energy; offshore structures; underwater vehicles; ocean environmental modeling
(This special issue belongs to the Section Oceans and Coastal Zones)
Groundwater Hydrochemistry in Mining Environments
edited by Pu Liu, Bo Li and
submission deadline 31 Jul 2026 | Viewed by 32 | Submission Open
Keywords: acid mine drainage (AMD); heavy metal; hydrogeochemistry; mine closure; microbial hydrogeochemistry; multi-tracer isotopes; kinetics of sulfide mineral oxidation; reactive transport modeling; emerging contaminants; mineral recycling; machine learning technology; contamination treatment technology; coupled modeling of groundwater processes
(This special issue belongs to the Section Hydrogeology)
Emerging Contaminants in the Water Environment
edited by
submission deadline 31 Jul 2026 | Viewed by 30 | Submission Open
Keywords: emerging contaminants; antibiotic resistance genes; PFAS biodegradation; metabolic trade-offs; heavy metal biotransformation; synthetic microbial consortia; multi-omics integration; engineered microbiome
(This special issue belongs to the Section Water Quality and Contamination)
Anaerobic Processes in Wastewater Treatment: Current Limitations and Future Challenges
edited by and
submission deadline 31 Jul 2026 | Viewed by 24 | Submission Open
Keywords: anaerobic digestion; digestate reuse and nutrient recovery; anaerobic membrane bioreactor; green energy; waste treatment; anaerobic process; fermentation
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Circular Ecohydrology for Mediterranean Coastal Systems: Nature-Based Solutions, Waste Valorization and Ecosystem Restoration
edited by , Oula Amrouni and
submission deadline 31 Jul 2026 | Viewed by 18 | Submission Open
Keywords: ecohydrology; transitional waters; circular economy; waste valorization; nature-based solutions; mediterranean semi-arid regions; saltwater intrusion; emerging contaminants; nutrient recovery; bioindicators; ecosystem restoration
(This special issue belongs to the Section Ecohydrology)
Water and Environment for Sustainability
edited by , Selvam Sivathass Bannir and
submission deadline 31 Jul 2026 | Viewed by 13 | Submission Open
Keywords: hydrology and water resources; rivers; lakes; estuaries; and seas; extreme events and climate change; water supply and wastewater treatment; environmental pollution and protection; sustainable technology and engineering; sustainable development goals; sustainable environment
(This special issue belongs to the Section Hydrology)
Epidemiology and Public Health Issues Related to Waters submission deadline 10 Aug 2026 | Viewed by 27 | Submission Open
Keywords: water and disease; water and risk; epidemiological methods; public health
(This special issue belongs to the Section Water and One Health)
Sustainable Water Management in Agricultural Irrigation
edited by Dat Q Tran
submission deadline 20 Aug 2026 | 4 articles | Viewed by 5001 | Submission Open
Keywords: irrigated agriculture; cropping patterns; irrigation technologies; managed aquifer recharge (MAR); re-claimed/treated water; water– energy– food nexus; transboundary conflict and cooperation; water institutions
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Biofilm Technologies for Circular and Sustainable Wastewater Treatment and Resource Recovery
edited by
submission deadline 20 Aug 2026 | Viewed by 108 | Submission Open
Keywords: biofilm-based processes; wastewater treatment; resource recovery; waste valorisation; circular bioeconomy; fungal and algal biofilms; biofilm reactor design and scale-up; biofilm modelling and control; extracellular polymeric substances (EPS); environmental biotechnology
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Science and Technology for Water Purification, 3rd Edition
edited by Yuanfeng Qi, , Kai He and
submission deadline 20 Aug 2026 | Viewed by 24 | Submission Open
Keywords: recycling and resource; pollutant removal; byproduct remedy; functional materials; processing models; reactors; wastewater engineering; identification and analysis
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Applications of Microorganisms Supported on Biochar for Soil Water Quality
edited by
submission deadline 25 Aug 2026 | Viewed by 32 | Submission Open
Keywords: biochar– microbe composites; soil improvement; bioremediation; microbial immobilization; pollutant degradation; nutrient retention; eco-friendly strategy; agricultural sustainability; municipal waste and organic waste are the source of soil and water continents
(This special issue belongs to the Section Water Quality and Contamination)
Aquaculture Tailwater Treatment: Theoretical Foundations and Applied Techniques
edited by
submission deadline 31 Aug 2026 | 1 articles | Viewed by 1452 | Submission Open
Keywords: aquaculture effluent; tailwater treatment technology; aquatic environmental protection; nitrogen and phosphorus removal; waste resource utilization; environmental microbiology; intelligent equipment; sustainable aquaculture
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Biological Wastewater Treatment and Its Resource Recovery submission deadline 31 Aug 2026 | Viewed by 19 | Submission Open
Keywords: sustainable wastewater treatment; biofactories; circular economy; by-product from wastewaters; bioengineering
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Water and Education: Teaching Sustainability, Managing Risks, and Shaping the Future submission deadline 25 Sep 2026 | Viewed by 253 | Submission Open
Keywords: sustainable development goals (SDGs); climate change and water; water resources and landscapes; end-purposes of water teaching; flood risk management; water conservation strategies; hydrological cycle education; community engagement in water sustainability; resilient water governance
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Freshwater Fish Conservation and Management: Current Status and Future Prospects
edited by
submission deadline 30 Sep 2026 | Viewed by 63 | Submission Open
Keywords: freshwater fish conservation; inland fishery management; migratory fishes; riverine ecosystem health; freshwater biodiversity; endangered species; anthropogenic threats to freshwater fishes; innovative monitoring methods and conservation solutions
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Innovations in Integrated Surface and Groundwater Model Development and Socio-Environmental Applications
edited by Nigel W. T. Quinn
submission deadline 30 Sep 2026 | Viewed by 57 | Submission Open
Keywords: decision support; model integration; artificial intelligence/machine learning; water resources; water quality; socio-environmental applications
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Water Quality Engineering and Wastewater Treatment, 4th Edition submission deadline 31 Oct 2026 | 2 articles | Viewed by 2119 | 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)
Resilient Rivers: Integrating Nature-Based Solutions with Hydraulic Engineering
edited by and
submission deadline 20 Nov 2026 | 3 articles | Viewed by 2262 | 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)
Current Strategies to Remediate Emerging Environmental Toxicants submission deadline 20 Dec 2026 | Viewed by 77 | Submission Open
Keywords: bioremediation; water chemistry; forever chemicals; electrochemical systems; emerging toxicants; PFAS; defluorination; microbial degradation; electrochemical remediation
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Landslide on Hydrological Response
edited by Lei Zhang
submission deadline 31 Dec 2026 | 3 articles | Viewed by 2431 | Submission Open
Keywords: water-induced landslide; landslide stability; deformation mechanism; landslide susceptibility mapping; multi-fields monitoring
(This special issue belongs to the Section Hydrogeology)
Urban Water Pricing Balancing Financial Viability and Social Fairness
edited by , and Evangelos Keramaris
submission deadline 31 Dec 2026 | Viewed by 108 | Submission Open
Keywords: urban water services pricing; resilience; social fairness; economic depression; equitable access
(This special issue belongs to the Section Urban Water Management)
Water Reuse and Land Management: Strategies, Policies, and Integrated Land-Use Approaches
edited by
submission deadline 31 Dec 2026 | Viewed by 85 | Submission Open
Keywords: water reuse; land management; integrated land-use planning; sustainable agriculture; urban water applications; water reuse
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
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