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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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Ship and Ocean Engineering
edited by and
submission deadline 23 Jan 2026 | 3 articles | Viewed by 4879 | Submission Open
Keywords: fixed and floating offshore wind turbines; cables and mooring; wave loads; wind loads
(This special issue belongs to the Section Oceans and Coastal Zones)
Aquaculture Productivity and Environmental Sustainability
edited by Changwei Li, and Gang Liu
submission deadline 25 Jan 2026 | 6 articles | Viewed by 15701 | Submission Open
Keywords: recirculating aquaculture systems; aquaculture engineering; wastewater treatment; environmental sustainability; precise farming management; smart aquaculture
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Risk Characterization, Assessment, and Management Derived from Water for Environmental/Human Health submission deadline 25 Jan 2026 | 5 articles | Viewed by 9608 | Submission Open
Keywords: water and human development; water pollution; risk assessment; environmental health risks; human health risks; hazard identification; dose– response assessment; exposure assessment; risk characterization
(This special issue belongs to the Section Water and One Health)
Basin Non-Point Source Pollution
edited by , Qiuliang Lei and Cheng Sun
submission deadline 25 Jan 2026 | 5 articles | Viewed by 8871 | Submission Open
Keywords: non-point source pollution; watershed model; best management practices; watershed management; agricultural management
(This special issue belongs to the Section Water Quality and Contamination)
Potential of Artificial Intelligence in Addressing Critical Challenges Related to Water Resources
edited by and
submission deadline 25 Jan 2026 | 1 articles | Viewed by 6652 | Submission Open
Keywords: water treatment; water management; contaminants; artificial intelligence; deep learning applications; predictive modeling
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Applications of Multi-Source Remote Sensing Technologies in Soil Moisture Monitoring submission deadline 25 Jan 2026 | 3 articles | Viewed by 5400 | Submission Open
Keywords: soil moisture inversion; mulit-source remote sensing technologies; data fusion
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Protection and Restoration of Freshwater Ecosystems
edited by
submission deadline 25 Jan 2026 | 5 articles | Viewed by 4988 | Submission Open
Keywords: conservation activities; ecological restoration; ecological state; extinction risk; freshwater environments; protection of biodiversity; threats to freshwater environments
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
River Science: Integrated Management of Water Resources in the Anthropocene, 2nd Edition
edited by
submission deadline 25 Jan 2026 | 1 articles | Viewed by 1896 | Submission Open
Keywords: river science; monitoring; multiple stressors; hydrobiology; hydromorphology; river restoration; habitat modeling
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Hydrogeology of the Mining Area submission deadline 25 Jan 2026 | 1 articles | Viewed by 1007 | Submission Open
Keywords: hydrogeological characterization; hydrogeological modeling; dewatering; open pit; deep mining; hydrochemistry; backfill; environmental impact; mine site reclamation
(This special issue belongs to the Section Hydrogeology)
Snow and Glacier Hydrology in Changing Climate and Urbanisation
edited by Mohd Soheb
submission deadline 25 Jan 2026 | Viewed by 752 | Submission Open
Keywords: glaciers; snowmelt; hydrology; runoff; water management; climate change
(This special issue belongs to the Section Hydrology)
Machine Learning in Water Distribution Systems and Sewage Systems
edited by Jacek Piekarski and
submission deadline 26 Jan 2026 | 2 articles | Viewed by 2653 | Submission Open
Keywords: water distribution systems; sewage systems; stormwater systems; hydraulic simulations; artificial intelligence models; machine learning; deep learning models; evolutionary computation; fuzzy inference
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Using Machine Learning Methods for Agricultural Water Cycle Assessment
edited by
submission deadline 27 Jan 2026 | 3 articles | Viewed by 7999 | Submission Open
Keywords: agricultural water resources; machine learning; water demand; big data; features
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Monitoring and Assessment of Water Quality in Drinking Water Distribution Systems
edited by Hui Zhang and Dan Zhong
submission deadline 30 Jan 2026 | 9 articles | Viewed by 29709 | Submission Open
Keywords: water distribution system; drinking water; water quality; monitoring; water quality indicator; water quality analysis; pollutant; risk assessment; water quality management; modeling
(This special issue belongs to the Section Water Quality and Contamination)
Inclusive Disaster Risk Reduction: Gender, Community-Based Approaches, and Local Governance in Mitigating Water-Related Hazards
edited by and Wahid Ullah
submission deadline 30 Jan 2026 | 3 articles | Viewed by 11865 | Submission Open
Keywords: inclusive disaster risk reduction; community resilience and vulnerability; local governance and disaster risk reduction; community-based disaster risk management; socio-economic impacts of water hazards; nature-based solutions for disaster risk reduction and climate change adaptation; water hazards and social inequalities; gender based violence in response to water hazards
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Effects of Hydrology on Soil Erosion and Soil Water Conservation
edited by Yifan Dong, and
submission deadline 30 Jan 2026 | 3 articles | Viewed by 5110 | Submission Open
Keywords: water erosion; splash erosion; rainfall; overland flow; concentrated flow; jet flow; infiltration; subsurface flow; modeling; soil conservation
(This special issue belongs to the Section Soil and Water)
Study of Hydrological Mechanisms: Floods and Landslides
edited by Prabin Kayastha
submission deadline 30 Jan 2026 | 1 articles | Viewed by 4501 | Submission Open
Keywords: hydology; landslides; floods; numerical model; machine learning
(This special issue belongs to the Section Hydrogeology)
Applications of GIS and Remote Sensing in Hydrology and Hydrogeology
edited by , and Lei Ma
submission deadline 30 Jan 2026 | 2 articles | Viewed by 3077 | Submission Open
Keywords: GIS and remote sensing; hydrology and hydrogeology; hydrological modeling and simulation; water resource management; flood and drought monitoring; climate change impact analysis
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Sources, Transport, and Fate of Contaminants in Waters and Sediment
edited by and
submission deadline 30 Jan 2026 | 2 articles | Viewed by 2467 | Submission Open
Keywords: water quality; sediment and sediment contamination; pollutant transport and transport models; aquatic ecosystems; sediment-water exchange and interactions; toxicity; water-sediment exchange
(This special issue belongs to the Section Water Quality and Contamination)
Application of Machine Learning in Hydrological Monitoring
edited by and Zhouyayan Li
submission deadline 30 Jan 2026 | 1 articles | Viewed by 2252 | Submission Open
Keywords: machine learning; hydrological monitoring; AI-driven models; data augmentation; flood forecasting; water quality analysis; decision support systems; streamflow prediction; data retrieval techniques; large language models
(This special issue belongs to the Section Hydrology)
Impacts of Contaminants on Aquatic Ecosystems and Strategies for Water Quality Improvement
edited by , and Taotao Lu
submission deadline 30 Jan 2026 | Viewed by 358 | Submission Open
Keywords: contaminant behavior; water quality assessment; aquatic ecosystem stability; remediation technologies; sus-tainable water management
(This special issue belongs to the Section Water Quality and Contamination)
Reservoir Control Operation and Water Resources Management, 2nd Edition
edited by Yuxue Guo, and Hao Chen
submission deadline 31 Jan 2026 | 13 articles | Viewed by 21498 | Submission Open
Keywords: water; food; and energy; reservoir operation; water resources management; changing environment; uncertainty; risk; artificial intelligence
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
ANAMMOX Based Technology for Nitrogen Removal from Wastewater
edited by Cancan Jiang
submission deadline 31 Jan 2026 | 6 articles | Viewed by 15264 | Submission Open
Keywords: anammox; partial nitrification; greenhouse gas; quorum sensing; bacterial community
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Groundwater Quality and Human Health Risk, 2nd Edition submission deadline 31 Jan 2026 | 5 articles | Viewed by 15135 | Submission Open
Keywords: groundwater geochemistry; groundwater contamination; groundwater composition and human health risk; groundwater quality; inorganic compounds; organic compounds; trace elements; arsenic; antimony; chromium; microbes; radionuclides; groundwater protection and preservation; groundwater remediation; groundwater treatment technologies
(This special issue belongs to the Section Water Quality and Contamination)
Recent Advances in Hydraulic Machinery and Its Application in Marine Engineering submission deadline 31 Jan 2026 | 10 articles | Viewed by 14077 | Submission Open
Keywords: design method; optimizing strategy; flow characteristics; transient process; cavitation; erosion; numerical method; tidal energy; wave energy; marine hydrokinetics; environmentally friendly
(This special issue belongs to the Section Hydraulics and Hydrodynamics)
Soil Erosion and Soil and Water Conservation, 2nd Edition
edited by , Jianye Ma and
submission deadline 31 Jan 2026 | 8 articles | Viewed by 11196 | Submission Open
Keywords: soil erosion; soil and water conservation; ecohydrology; climate change; vegetation restoration; gully engineering
(This special issue belongs to the Section Soil and Water)
Advances in the Treatment of Refractory Organic Wastewater
edited by and
submission deadline 31 Jan 2026 | 1 articles | Viewed by 3568 | Submission Open
Keywords: adsorption; Fenton-like catalyst; physical fields enhancement; electro-assissted treatment; nutrients; microplastic
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Working Across Borders to Address Water Scarcity
edited by and Rosario Sanchez
submission deadline 31 Jan 2026 | 1 articles | Viewed by 1138 | Submission Open
Keywords: transboundary water management; water scarcity; water sharing; water storage; policy and governance in water-scarce regions
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
The Innovations in Anaerobic Digestion Technology
edited by Xiang Cheng and Yin Xu
submission deadline 31 Jan 2026 | 1 articles | Viewed by 1087 | Submission Open
Keywords: process enhancement; hybrid configuration; pre- and post-treatment; co-digestion; biogas upgrading; resource recovery; circular economy
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Eco-Engineered Solutions for Industrial Wastewater
edited by
submission deadline 31 Jan 2026 | 2 articles | Viewed by 977 | Submission Open
Keywords: constructed wetlands; industrial wastewater; nature-based solutions; sustainable substrates; tidal flow systems; dye and surfactant removal; microbial ecology; eco-engineering; low-cost materials; circular economy
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Advances in the Treatment of Micropollutants and Microplastics: From Laboratory Studies to Machine Learning
edited by Mingizem Gashaw Seid
submission deadline 31 Jan 2026 | Viewed by 329 | Submission Open
Keywords: advanced oxydation processes; electrochemistry; environmental pollution; degradation mechanisms; persistent micropollutants; perfluorooctanoic acid (PFOA); pharmaceuticals; photocatalysis; peroxide chemistry; sustainable biochar; UV-based degradation; wastewater
(This special issue belongs to the Section Water Quality and Contamination)
Climate and Water: Impacts of Climate Change on Hydrological Processes and Water Resources, 2nd Edition
edited by and
submission deadline 31 Jan 2026 | Viewed by 147 | Submission Open
Keywords: climate change; hydrological cycle; climate-related hydrological processes; distributed model; statistical analysis; water resource and its utilization; future scenario simulation; remote sensing application; GIS application
(This special issue belongs to the Section Water and Climate Change)
Sources, Migration and Variation Characteristics of Pollutants in Aquatic Environments
edited by and
submission deadline 5 Feb 2026 | Viewed by 297 | Submission Open
Keywords: karst aquifer vulnerability; pollution transport mechanisms; heavy metal contamination; integrated water management; climate change interactions
(This special issue belongs to the Section Water Quality and Contamination)
Water Treatment Technology for Emerging Contaminants, 2nd Edition
edited by
submission deadline 10 Feb 2026 | 7 articles | Viewed by 14158 | Submission Open
Keywords: emerging pollutants; water treatment technologies; innovation and development; water environment; research and applications
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Microalgae Control and Utilization: Challenges and Perspectives submission deadline 10 Feb 2026 | 5 articles | Viewed by 12876 | Submission Open
Keywords: microalgae; cultivation of microalgae; phytoremediation; wastewaters; algal bloom; microalgal toxins
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Crop Evapotranspiration, Crop Irrigation and Water Savings submission deadline 10 Feb 2026 | 3 articles | Viewed by 5687 | Submission Open
Keywords: the use of FAO crop coefficients and transpiration coefficients; evapotranspiration; aerodynamic and bulk canopy resistance; evapotranspiration; irrigation scheduling and water saving; tree evapotranspiration; traditional and under-utilized vegetable crops; remote sensing and irrigation scheduling; crop management for controlling ET and yield; precision irrigation; irrigation scheduling using crop coefficients from fraction of ground cover and height; use of model tools
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Novel Advanced Oxidation Technology for Water Treatment
edited by Pengwei Yan, Lei Yuan and Jimin Shen
submission deadline 10 Feb 2026 | 3 articles | Viewed by 2442 | Submission Open
Keywords: UV; oxidants; water purification; reactive oxygen species; underlying mechanism
(This special issue belongs to the Section Water Quality and Contamination)
Editorial Board Members’ Collection Series: Emerging Issues in Urban Wastewater Treatment Following EU’s Wastewater Treatment Directive Recast submission deadline 10 Feb 2026 | 1 articles | Viewed by 1525 | Submission Open
Keywords: urban wastewater treatment; sanitation in small communities; nutrients and emerging pollutants treatment; water reuse and recycle; energy and resources recovery: energy neutrality and audits in WWTPs; sewage and effluents monitoring
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Ecohydraulics and Fish Behavior Simulation
edited by
submission deadline 10 Feb 2026 | 1 articles | Viewed by 1089 | Submission Open
(This special issue belongs to the Section Hydraulics and Hydrodynamics)
Application of Isotope Geochemistry in Hydrological Research
edited by and Petra Žvab Rožič
submission deadline 10 Feb 2026 | 1 articles | Viewed by 823 | Submission Open
Keywords: hydrological and hydrogeological research; isotope geochemistry; satable and radiogenic isotopes conceptual models; hydrogeological assessment; water resource management
(This special issue belongs to the Section Hydrology)
Advanced Technologies in Water and Wastewater Treatment submission deadline 15 Feb 2026 | 6 articles | Viewed by 15920 | Submission Open
Keywords: water and wastewater treatment; advanced oxidation processes; membrane separation; electrochemical processes; nanotechnology; desalination; water quality monitoring; water reuse
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Use of Remote Sensing Technologies for Water Resources Management
edited by and Anukesh Krishnan Kutty Ambika
submission deadline 15 Feb 2026 | 7 articles | Viewed by 15377 | Submission Open
Keywords: satellite remote sensing; unmanned aerial vehicle (UAV); LiDAR hydrology; ground-based remote sensing; geospatial intelligence; hydrological modeling; flood and drought prediction; hazardous algal blooms (HABs); waterborne disease monitoring
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Water Supply System Reliability, Resilience, Safety and Risk Modelling & Assessment, 3rd Edition submission deadline 15 Feb 2026 | 6 articles | Viewed by 12475 | Submission Open
Keywords: artificial inteligence  ; contamination  ; crisis situation  ; cybersecurity in water supply systems  ; data-driven decision-making; digital twin  ; diversification  ; failure risk analysis  ; hazard identification  ; innovative methodologies  ; IoT  ; machine learning  ; manage drinking water supply safety  ; matrix  ; neural networks  ; optimal network design  ; prediction models  ; reliability-based risk assessment  ; resilience  ; risk analysis  ; risk and vulnerability assessment  ; risk assessment methodology  ; safety  ; smart metering  ; techniques and technology for smart water systems  ; the rehabilitation of water distribution networks  ; the safety of water supply systems  ; water demand modeling  ; water distribution networks  ; water– energy nexus  ; water losses  ; water network failure analysis  ; water quality  ; water quality monitoring  ; water safety plans  ; water supply systems  ; water treatment
(This special issue belongs to the Section Urban Water Management)
Major Water Conservancy and Hydropower Project Hub Layout and Hydraulic Innovation Technology
edited by , , and Shicheng Li
submission deadline 15 Feb 2026 | 4 articles | Viewed by 5072 | Submission Open
Keywords: high dams; large reservoirs; engineering hydraulic safety; high-speed flow; safety assessments; new technologies; deep drainage; two-phase flow
(This special issue belongs to the Section Hydraulics and Hydrodynamics)
Water–Rock Interaction
edited by Teng Ma and
submission deadline 15 Feb 2026 | 2 articles | Viewed by 2518 | Submission Open
Keywords: water– rock interaction; groundwater; aquifer; geochemistry of groundwater system; hydrochemistry; isotopes; eco-environmental effect; ecological health
(This special issue belongs to the Section Hydrogeology)
New Technologies to Ensure Safe Drinking Water
edited by Yizhen Cheng, and Pengwei Yan
submission deadline 17 Feb 2026 | 2 articles | Viewed by 861 | Submission Open
Keywords: water treatment; oxidation technology; coagulation; fouling behavior; environmental microbiology technology
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Water, Geohazards, and Artificial Intelligence, 2nd Edition
edited by
submission deadline 20 Feb 2026 | 8 articles | Viewed by 18109 | Submission Open
Keywords: landslides; slope stability; artificial intelligence; experiments and models; natural hazards; porous media; geotechnical hazards; geomorphology and climate change; remote sensing and GIS analysis; morphotectonics; water basins; watershed morphometric indices; debris flow; water table; groundwater seepage; failure mechanism; hydrogeology
(This special issue belongs to the Section Hydrology)
Application of Various Hydrological Modeling Techniques and Methods in River Basin Management, 2nd Edition
edited by Ankur Srivastava, and
submission deadline 20 Feb 2026 | 8 articles | Viewed by 13423 | 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)
Wastewater Treatment and Public Health Surveillance: Advances and Challenges in the One Health Era
edited by and Israel Diaz
submission deadline 20 Feb 2026 | 5 articles | Viewed by 10308 | Submission Open
Keywords: wastewater treatment; one health; wastewater-based epidemiology; emerging pollutants; antimicrobial resistance; microplastics; environmental monitoring; biosensors
(This special issue belongs to the Section Water and One Health)
Advances in Extreme Hydrological Events Modeling
edited by Majid Mirzaei
submission deadline 20 Feb 2026 | 4 articles | Viewed by 9605 | Submission Open
Keywords: extreme hydrological events; extreme precipitation; frequency analysis; drought; floods; climate change impacts; uncertainty analysis; data assimilation; hydrological modeling; machine learning; deep learning
(This special issue belongs to the Section Water and Climate Change)
Regional Geomorphological Characteristics and Sedimentary Processes
edited by
submission deadline 20 Feb 2026 | 7 articles | Viewed by 9317 | Submission Open
Keywords: geomorphology and sediment transport; deposition and erosion; geomorphological features; reservoir sedimenta-tion; climate change impacts; fluvial dynamics; hydrodynamic conditions; paleoenvironmental reconstructions; GIS applications; sedimentary records; geological modeling; environmental management
(This special issue belongs to the Section Water Erosion and Sediment Transport)
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