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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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Research on the Carbon Cycle in the Aquatic Environment
edited by , and
submission deadline 29 Sep 2026 | Viewed by 395
Keywords: aquatic carbon cycle; greenhouse gases; biogeochemistry; carbon sequestration; land-water interface; climate change; dissolved organic matter; water quality; isotopic tracing; carbon fluxes
(This special issue belongs to the Section Water Quality and Contamination)
Flood Risk Identification and Management, 2nd Edition
edited by Juan Chen
submission deadline 30 Sep 2026 | 9 articles | Viewed by 11242 | Submission Open
Keywords: flood; flood management; flood control operation; risk identification; risk assessment; risk management; uncertainty
(This special issue belongs to the Section Hydrology)
GIS Applications in Hydrology and Water Resources
edited by
submission deadline 30 Sep 2026 | 1 articles | Viewed by 4773 | Submission Open
Keywords: geographic information systems (GIS); flood risk assessment ; groundwater potential mapping ; multi-criteria decision analysis (MCDA); remote sensing; machine learning; site suitability analysis; water quality index; erosion and sediment yield ; hydrological modeling
(This special issue belongs to the Section Hydrology)
Urban Drainage Systems and Stormwater Management, 2nd Edition
edited by
submission deadline 30 Sep 2026 | 5 articles | Viewed by 3784 | Submission Open
Keywords: urban drainage systems; urban flooding; low-impact development (LID); sponge city; urban rainwater collection; urban resilience
(This special issue belongs to the Section Urban Water Management)
Multicriteria Analysis and Decision-Making in Water Resources Management
edited by
submission deadline 30 Sep 2026 | 2 articles | Viewed by 1493 | Submission Open
Keywords: watershed management; GIS; decision science; policy and planning; restoration; conservation
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Advanced Methods in Geomorphic Analysis and Flood-Prone Landscape Dynamics submission deadline 30 Sep 2026 | 1 articles | Viewed by 875 | Submission Open
Keywords: methods in geomorphology; landscape susceptibility; risk mitigation; GIS application; engineering geology; natural processes vs. human activity
(This special issue belongs to the Section Hydrology)
Energy Recovery and Clean Water: Techno-Economic and Environmental Assessments—2nd Edition submission deadline 30 Sep 2026 | 1 articles | Viewed by 820 | 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-Energy Nexus)
Geothermal Reservoir Modeling: Emerging Techniques, Practical Applications and Modeling Challenges submission deadline 30 Sep 2026 | 1 articles | Viewed by 772 | Submission Open
Keywords: geothermal reservoir modeling; enhanced geothermal systems (EGSs); coupled process simulation; data-driven modeling; reservoir characterization; uncertainty quantification; model calibration; sustainable geothermal development; hybrid geothermal systems; subsurface energy systems
(This special issue belongs to the Section Hydrogeology)
Water Treatment Technology for Emerging Contaminants, 3rd Edition
edited by
submission deadline 10 Oct 2026 | Viewed by 309 | Submission Open
Keywords: emerging pollutants; water treatment technologies; innovation and development; water environment; research and applications; artificial intelligence; data-driven solutions
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Reactive Species and Chemical Transformation in Water Treatment Systems
edited by and Jie Yang
submission deadline 10 Oct 2026 | Viewed by 236 | Submission Open
Keywords: advanced oxidation processes; reactive species; transformation chemistry; reaction mechanisms; catalyst screening; degradation pathways; artificial intelligence; machine learning
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Coastal and Marine Governance and Protection, 2nd Edition
edited by , and Daniel O. Suman
submission deadline 15 Oct 2026 | 3 articles | Viewed by 7714 | Submission Open
Keywords: coastal governance; citizen science; participatory management; blue economy; adaptive risk management
(This special issue belongs to the Section Oceans and Coastal Zones)
Wetland Water Quality Monitoring and Assessment
edited by and Tianxiang Wang
submission deadline 15 Oct 2026 | 3 articles | Viewed by 4923 | 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)
Electrochemical and Bioelectrochemical Technologies for Sustainable Water Treatment
edited by Yuanfeng Liu and
submission deadline 15 Oct 2026 | 1 articles | Viewed by 1996 | Submission Open
Keywords: electrochemical advanced oxidation process; bioelectrochemical system; electrocoagulation/electroflotation; resources recovery; electrochemical sensing monitoring; system scale-up research
(This special issue belongs to the Section Wastewater Treatment and Reuse)
The Oxidation and Disinfection Processes in Water Treatment
edited by Yuanyuan Zhang
submission deadline 15 Oct 2026 | 3 articles | Viewed by 1554 | Submission Open
Keywords: disinfection; disinfection by-products; advanced oxidation technology; advanced restoration technology; microbial inactivation
(This special issue belongs to the Section Water Quality and Contamination)
Water Supply System Reliability, Resilience, Safety and Risk Modelling & Assessment, 4th Edition
edited by and
submission deadline 15 Oct 2026 | 1 articles | Viewed by 684 | Submission Open
Keywords: advanced metering infrastructure (AMI); artificial intelligence (AI); asset management; contamination; crisis management; cyber–physical security; cybersecurity; data-driven decision-making; digital twin; district metered areas (DMAs); drinking water safety management; early warning systems (EWSs); emerging contaminants; emergency water supply; failure risk analysis; hazard identification; IoT; leakage detection; machine learning; neural networks; non-revenue water (NRW); OT security; operational intelligence; optimal network design; PFAS; prediction models; predictive maintenance; pressure management; rehabilitation of water distribution networks; remote sensing; resilience; reliability-based risk assessment; risk analysis; risk assessment methodology; risk and vulnerability assessment; risk matrix; robotics; satellite leak detection; SCADA; smart metering; water safety plans; water demand modeling; water distribution networks; water losses; water network failure analysis; water quality; water quality monitoring; water treatment; water–energy nexus
(This special issue belongs to the Section Urban Water Management)
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 Oct 2026 | 8 articles | Viewed by 11070 | 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)
Protection and Restoration of Lake and Water Reservoir
edited by Xiaoxiao Wang
submission deadline 20 Oct 2026 | 5 articles | Viewed by 9257 | 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)
Emerging Contaminants in Natural and Engineered Water Environments: Environmental Behavior, Ecological Effects and Control Strategies, 2nd Edition
edited by , Xiaodong Li and
submission deadline 20 Oct 2026 | 3 articles | Viewed by 7066 | Submission Open
Keywords: emerging contaminants; environmental behavior; ecotoxicology; ecological engineering; environmental remediation; treatment technologies; environmental microorganisms; natural processes; risk assessment
(This special issue belongs to the Section Water Quality and Contamination)
Intelligent Water Management: Machine Learning, Remote Sensing, Data Analytics, Predictive Modeling, and the Path to Sustainability submission deadline 20 Oct 2026 | 4 articles | Viewed by 5209 | Submission Open
Keywords: artificial intelligence (AI); water quality monitoring; predictive modeling; flood forecasting; drought prediction; water resource management; big data analytics; climate resilience; sustainable water management; environmental science; hydrological modeling; machine learning; remote sensing; data-driven decision-making; smart water systems; water distribution optimization; AI-driven forecasting; ecosystem management; water conservation; water infrastructure management
(This special issue belongs to the Section Hydrology)
Emerging Contaminants in Water Environments: Occurrence, Analysis and Ecotoxicity
edited by , and
submission deadline 20 Oct 2026 | 6 articles | Viewed by 5155 | Submission Open
Keywords: spatial–temporal distribution; target analysis; suspect screening; non-target analysis; environmental impact; ecological risk; ecotoxicology mechanism
(This special issue belongs to the Section Water Quality and Contamination)
Advanced Data Analytics for Water Quality and Public Health
edited by
submission deadline 20 Oct 2026 | 6 articles | Viewed by 4802 | Submission Open
Keywords: machine learning; GIS; remote sensing; water quality; emerging contaminants; public health
(This special issue belongs to the Section Water Quality and Contamination)
The Development and Application of Membrane and Hybrid Technology in the Treatment of Emerging Pollutants
edited by and
submission deadline 20 Oct 2026 | 1 articles | Viewed by 4796 | Submission Open
Keywords: membrane technology; emerging pollutants; membrane process; hybrid processes; membrane fabrication; fouling control; process modeling; resource recovery; rejection mechanism; matrix effect
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Intelligent Water Networks: Advanced Sensing, Real-Time Analytics, and Adaptive Management for Future Water Challenges submission deadline 20 Oct 2026 | 3 articles | Viewed by 4543 | Submission Open
Keywords: intelligent water systems; advanced sensors; real-time analytics; machine learning; digital twins; edge computing; adaptive management; IoT; water quality monitoring; predictive modeling
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
River Channel Hydraulics, Fluvial Dynamics and Re-Opening Floodplains
edited by
submission deadline 20 Oct 2026 | 4 articles | Viewed by 4162 | Submission Open
Keywords: open channel flow; sediment transport; numerical and experimental modelling; reopening floodplains
(This special issue belongs to the Section Hydraulics and Hydrodynamics)
Biological Nitrogen Removal in the Multi-Omics Era: Coupling Anammox with Microbial-Mineral Synergy
edited by Zhaoming Zheng, and
submission deadline 20 Oct 2026 | 3 articles | Viewed by 3781 | Submission Open
Keywords: sustainable nitrogen removal processes; anaerobic ammonium oxidation; aerobic granular sludge; microbial– mineral interactions; multi-omics microbial analysis; bioengineering in wastewater treatment; nitrogen biogeo-chemical cycle; detection and removal of emerging pollutants; water quality assurance technologies; resource re-covery from wastewater
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Hydrodynamics in Pumping and Hydropower Systems, 2nd Edition
edited by and
submission deadline 20 Oct 2026 | 4 articles | Viewed by 3383 | Submission Open
Keywords: pumps; turbines; hydropower; numerical simulation; experiments; vibration; hydraulic forces; hydraulic transient; stability; control strategy
(This special issue belongs to the Section Hydraulics and Hydrodynamics)
Application of Artificial Intelligence (AI) in Water Quality Monitoring, 2nd Edition
edited by
submission deadline 20 Oct 2026 | 3 articles | Viewed by 2979 | Submission Open
Keywords: water quality monitoring; artificial intelligence; deep learning; machine learning; precise regulation; intelligent recognition; predictive warning; real-time monitoring; model optimization
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Coastal Biodiversity Conservation and Restoration
edited by Ettore Nepote and
submission deadline 20 Oct 2026 | 3 articles | Viewed by 2609 | Submission Open
Keywords: biodiversity; restoration; coastal zones; protected habitats; conservation measures
(This special issue belongs to the Section Oceans and Coastal Zones)
Advances in Machine Learning for Flood Prediction and Water Risk Management
edited by Masrur Ahmed
submission deadline 20 Oct 2026 | 3 articles | Viewed by 2409 | Submission Open
Keywords: flood prediction; machine learning and deep learning; hydrological modeling; climate change impacts on flood; data assimilation; remote sensing; uncertainty analysis; early warning systems; flood prediction with global circulation model; integration of AI and physics-based models
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Advanced Research on Marine Geology and Sedimentology, 2nd Edition
edited by
submission deadline 20 Oct 2026 | 2 articles | Viewed by 2210 | Submission Open
Keywords: sediment; suspension; transport; bottom boundary layer; nepheloid layer
(This special issue belongs to the Section Hydrogeology)
Advanced Membrane Technologies for Recovery of Bio-Based Chemicals from Aqueous Systems
edited by Sung-Ju Im and Hongrae Im
submission deadline 20 Oct 2026 | 1 articles | Viewed by 1723 | Submission Open
Keywords: bio-based chemicals; nutrient recovery; membrane technology; resource management; resource recovery
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Sustainable Water Resource Management Using Cutting-Edge Technologies submission deadline 20 Oct 2026 | 2 articles | Viewed by 1623 | Submission Open
Keywords: artificial intelligence; machine learning/deep learning; sustainable water resource management; hydrological modelling; digital twins for water systems; flood risk mapping and early warning systems; sediment transport; flood and drought forecasting; groundwater modelling; remote sensing and IoT-enabled monitoring; optimisation of water distribution; water quality prediction; evapotranspiration forecasting; smart irrigation
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Water Management and Water-Saving Irrigation in Agricultural Areas submission deadline 20 Oct 2026 | 2 articles | Viewed by 1500 | Submission Open
Keywords: sustainable water management; water-saving irrigation; precision agriculture; remote sensing and IoT; climate change adaptation; water–energy–food nexus
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Water and Resource-Efficient Strategies for Sustainable Crop Production submission deadline 20 Oct 2026 | 2 articles | Viewed by 1462 | Submission Open
Keywords: water-use efficiency; resource efficiency; sustainable agriculture; irrigation management; nutrient management; soil health; climate-resilient farming; agricultural innovation
(This special issue belongs to the Section Soil and Water)
Integrating AI and Remote Sensing for Ecohydrological Monitoring and Prediction
edited by and Wen Zhang
submission deadline 20 Oct 2026 | 1 articles | Viewed by 1121 | Submission Open
Keywords: ecohydrology; water quality monitoring; remote sensing; GIS; environmental modeling
(This special issue belongs to the Section Ecohydrology)
Application of Geophysical Techniques in Hydrogeological Research
edited by Péter Szücs and
submission deadline 20 Oct 2026 | 1 articles | Viewed by 1028 | Submission Open
Keywords: hydrogeophysics; geophysical methods; environmental geophysics; geophysical inversion; data-driven approaches; aquifer characterization; groundwater exploration; subsurface imaging; groundwater monitoring
(This special issue belongs to the Section Hydrogeology)
Elemental and Isotopic Geochemistry Tracing of Aquatic Pollutants: Source Apportionment and Ecological Health Risk
edited by , and
submission deadline 20 Oct 2026 | 1 articles | Viewed by 968 | Submission Open
Keywords: isotope geochemistry; source apportionment; aquatic pollution; trace metals; ecological risk assessment
(This special issue belongs to the Section Water Quality and Contamination)
Operation and Intelligent Fault Diagnosis of Hydropower Units Under New Power Systems
edited by and
submission deadline 20 Oct 2026 | 1 articles | Viewed by 924 | Submission Open
Keywords: hydropower units; operation technology; new power systems; sediment wear; cavitation; numerical simulation; machine learning; intelligent monitoring; hydraulic machinery
(This special issue belongs to the Section Water-Energy Nexus)
Wastewater Treatment to Resource Recovery: Emerging Technologies for Circular and Sustainable Water Systems
edited by and
submission deadline 20 Oct 2026 | 2 articles | Viewed by 883 | Submission Open
Keywords: advanced treatment processes; bioenergy from wastewater; circular economy; resource recovery; wastewater treatment; water reclamation and reuse; nutrient recovery
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Early Warning System Toolboxes for Early Detection of Emerging Contaminants in Water submission deadline 20 Oct 2026 | 1 articles | Viewed by 808 | Submission Open
Keywords: early warning systems; contaminants of emerging concern; temporal monitoring; time-trend analysis; aquatic environments; effect-directed analysis; hyphenated mass spectrometry; effect-based monitoring; targeted/suspect/non-target screening; computational frameworks; exposure–hazard prioritization; data-driven prioritization
(This special issue belongs to the Section Water Quality and Contamination)
Integration of Computational Toxicology and Data Science: A New Generation of Metal Water Quality Benchmark Prediction Models
edited by Yunsong Mu
submission deadline 20 Oct 2026 | 1 articles | Viewed by 793 | Submission Open
Keywords: metal water quality criteria; bioavailability; biotic ligand model; machine learning; toxicokinet-ic-toxicodynamic modeling; species sensitivity distribution; regulatory ecotoxicology
(This special issue belongs to the Section Water Quality and Contamination)
New Techniques for Hydrologic Modelling and Forecasting
edited by
submission deadline 20 Oct 2026 | 1 articles | Viewed by 657 | Submission Open
Keywords: hydrological modelling; machine learning; flood forecasting; data assimilation; remote sensing; deep learning
(This special issue belongs to the Section Hydrology)
Application of Hydrological Modelling to Water Resources Management, 2nd Edition submission deadline 20 Oct 2026 | 1 articles | Viewed by 637 | Submission Open
Keywords: climate-change adaptation; climate-related disasters; decision support systems; digital twins; early warning systems; environmental uncertainties; hydrological modeling; integrated water resources management (IWRM); machine learning and deep learning; model-informed decision making; multi-criteria decision making; multi-objective opti-mization; optimal water allocation; probabilistic modeling; proactive management strategies; reinforcement learning; remote sensing and GIS applications; scheduling and planning; Sustainable Development Goals (SDGs); water–energy nexus; water supply and demand; water resources management
(This special issue belongs to the Section Hydrology)
Geophysical Methods for Landslide Monitoring and Hydrogeophysical Applications submission deadline 20 Oct 2026 | Viewed by 456 | Submission Open
Keywords: landslide monitoring; hydrogeophysics; geophysical methods; slope stability; time-lapse geophysics; soil moisture
(This special issue belongs to the Section Hydrogeology)
Functional Materials for Water Treatment: Challenges and Opportunities
edited by
submission deadline 20 Oct 2026 | 1 articles | Viewed by 421 | Submission Open
Keywords: functional materials; water treatment; wastewater reuse; desalination; advanced oxidation processes
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Atmospheric Water Harvesting
edited by
submission deadline 20 Oct 2026 | Viewed by 340 | Submission Open
Keywords: atmospheric water harvesting; fog harvesting; dew collection; water adsorption; water vapor dewing; water vapor refrigeration; thermoelectric cooling; sorption-based atmospheric water harvesting; hygroscopic materials; water–energy nexus
(This special issue belongs to the Section Water Use and Scarcity)
Emerging Contaminants in Estuarine and Coastal Environments: Dynamics and Impacts
edited by and
submission deadline 20 Oct 2026 | Viewed by 327 | Submission Open
Keywords: emerging contaminants; estuarine and coastal environments; contaminant dynamics; ecological effects; environmental monitoring; microplastics; POPs; antibiotics
(This special issue belongs to the Section Oceans and Coastal Zones)
Biogeochemical and Hydrological Processes in Permafrost Regions
edited by , and Nitin Chaudhary
submission deadline 20 Oct 2026 | Viewed by 285 | Submission Open
Keywords: permafrost hydrology; active layer dynamics; permafrost hydrological monitoring; biogeochemical cycling; car-bon and nutrient fluxes; surface water–groundwater interactions; thermokarst processes; cold‑region water-sheds; water quality in permafrost regions; hydrological modeling
(This special issue belongs to the Section Hydrology)
Cryosphere Changes and Their Impacts on Water Systems and Society
edited by
submission deadline 20 Oct 2026 | Viewed by 267 | Submission Open
Keywords: cryosphere change; hydrology; water resources; climate change; glacier retreat; permafrost degradation; snow cover change; cryosphere hazards; mountain regions; water security; cryosphere education
(This special issue belongs to the Section Hydrology)
Regional Geomorphological Characteristics and Sedimentary Processes, 2nd Edition
edited by
submission deadline 20 Oct 2026 | Viewed by 232 | 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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