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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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Groundwater Evolution and Hydrochemical Processes in Mining Environments
edited by , and
submission deadline 20 Feb 2026 | 3 articles | Viewed by 2167 | Submission Open
Keywords: hydrogeology; mining engineering; hydrochemical processes
(This special issue belongs to the Section Hydrogeology)
Sustainable Water Treatment Systems: Green Infrastructure and Bioremediation, 2nd Edition
edited by
submission deadline 20 Feb 2026 | 2 articles | Viewed by 1804 | Submission Open
Keywords: water treatment; sustainable; green; ecological restoration; bioremediation
(This special issue belongs to the Section Urban Water Management)
Application of Big Data and Machine Learning in Hydrological Forecasting and Water Resource Management
edited by and
submission deadline 20 Feb 2026 | 2 articles | Viewed by 1706 | Submission Open
Keywords: big data; machine learning; physics-informed machine learning; deep learning; hydrology; explainable AI; water resources; hydrological forecasting
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Biochar-Based Systems for Agricultural Water Management
edited by Hongxu Zhou, Wei Zheng and
submission deadline 20 Feb 2026 | 1 articles | Viewed by 1235 | Submission Open
Keywords: agricultural water management; biochar systems; nutrient recovery; pollutant removal; nonpoint source pollution; sustainable farming; water use efficiency; circular bioeconomy; soil and water quality; integrated water management
(This special issue belongs to the Section Water Quality and Contamination)
Wetland Conservation and Ecological Restoration, 2nd Edition
edited by , and
submission deadline 20 Feb 2026 | 1 articles | Viewed by 916 | Submission Open
Keywords: ecohydrological processes; environmental effects; ecological risks; biogeochemical processes; pollution; regulation; climate change; ecological functions; wetland ecosystems
(This special issue belongs to the Section Ecohydrology)
Water Resource Management: Watershed and Groundwater Pollution
edited by Claus Kohfahl
submission deadline 20 Feb 2026 | Viewed by 549 | Submission Open
Keywords: watershed management; groundwater pollution; hydrological modeling; water quality; artificial recharge (MAR); surface-groundwater interactions; climate change adaptation; water resource sustainability; Integrated Water Resources Management (IWRM)
(This special issue belongs to the Section Water Quality and Contamination)
Water Quality and Dynamics in Rivers and Lakes
edited by Zhi-Qiang Deng, Roohollah Noori and Saber Aradpour
submission deadline 20 Feb 2026 | Viewed by 460 | Submission Open
Keywords: water quality; hydrodynamics; inland waterbodies; hydraulic modeling; water quality modeling; pollutant fate
(This special issue belongs to the Section Water Quality and Contamination)
Vadose Zone Ecohydrology: Bridging Soil, Water, and Vegetation Dynamics
edited by Pedro Leite and
submission deadline 20 Feb 2026 | Viewed by 380 | Submission Open
Keywords: root zone hydrology; ecohydrological feedbacks; soil– plant– atmosphere continuum; soil and rock water dynamics; infiltration and surface runoff; invasive species; isotopic analysis
(This special issue belongs to the Section Ecohydrology)
Impacts of Climate Change on Marine Ecosystems and the Fate, Transport and Toxicity of Contaminants
edited by and
submission deadline 20 Feb 2026 | Viewed by 306 | Submission Open
Keywords: ecotoxicology; marine ecosystems; climate change; ocean acidification; contaminants; toxicity; biological responses; bioaccumulation; bioconcentration; adaptative strategies
(This special issue belongs to the Section Water and Climate Change)
Electrochemical Technology for Wastewater Treatment: Challenges and Solutions
edited by
submission deadline 20 Feb 2026 | Viewed by 265 | Submission Open
Keywords: electrochemical advanced oxidation processes; electrode materials; wastewater treatment; sustainable solutions; water reuse; energy efficiency; process scale-up; reactor design; process modelling; systems integration
(This special issue belongs to the Section Wastewater Treatment and Reuse)
New Challenges in Control and Monitoring of Aquatic Invasive Species
edited by Lorenzo Vilizzi and
submission deadline 20 Feb 2026 | Viewed by 203 | Submission Open
Keywords: biodiversity conservation; early detection and monitoring; risk assessment methods; ecosystem restoration; bio-control strategies; environmental policy and management
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Climate, Water, and Soil, 2nd Edition submission deadline 20 Feb 2026 | Viewed by 179 | Submission Open
Keywords: climate change; climate variability; hydrological cycle; carbon and nitrogen cycles; GHG emissions; climate water and soil interactions; climate vs. ecosystem functioning and services; irrigation water quality; crop water requirements
(This special issue belongs to the Section Water and Climate Change)
Optimal Design of Water Distribution Systems submission deadline 20 Feb 2026 | Viewed by 171 | Submission Open
Keywords: water distribution systems; optimization; optimal network design; hydraulic modelling; resilience; energy efficiency; cost-efficiency
(This special issue belongs to the Section Urban Water Management)
Agricultural Water Management—Coupling Hydrological and Crop Models
edited by and Danyang Yu
submission deadline 20 Feb 2026 | Viewed by 166 | Submission Open
Keywords: eco-hydrological modeling; crop modeling; model coupling; soil– plant– atmosphere continuum; agricultural water management; root growth and water uptake; soil moisture
(This special issue belongs to the Section Hydrology)
From Rainfall to Aquatic Ecosystems: Hydrological Processes and Environmental Effects
edited by and
submission deadline 20 Feb 2026 | Viewed by 165 | Submission Open
Keywords: rainwater; surface/ground water; rainfall processes; water pollution; materials cycle; source iden-tification; industrial discharge; atmosphere– hydrosphere interactions; environmental isotopes
(This special issue belongs to the Section Ecohydrology)
Resilience and Risk Management in Urban Water Systems
edited by and Ahmad Malekpour
submission deadline 20 Feb 2026 | Viewed by 128 | Submission Open
Keywords: urban water resilience; risk assessment; integrated water management; infrastructure sustainability; climate adaptation; hydraulic systems; system modeling and simulation; water-energy nexus; green infrastructure; decision support systems
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Applications of Machine Learning and Deep Learning in Coastal Process Modelling
edited by Pavitra Kumar
submission deadline 20 Feb 2026 | Viewed by 128 | Submission Open
Keywords: coastal dynamics; artificial intelligence; machine learning; coastal resilience; climate change
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Advances in Anaerobic Digestion for Sewage Sludge Treatment
edited by and
submission deadline 20 Feb 2026 | Viewed by 113 | Submission Open
Keywords: anaerobic fermentation/digestion; sludge treatment; pre-treatment; biogas upgrading; digestate management; microbial community; energy and resource recovery; emerging contaminants
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Research Progress of Groundwater Heat Pump Systems and Groundwater Resources Protection submission deadline 20 Feb 2026 | Viewed by 111 | Submission Open
Keywords: geothermal systems; geothermal exploration; groundwater heat pump systems; groundwater resources; aquifers
(This special issue belongs to the Section Hydrogeology)
Recycled Water for Enhancing Food Security Under a Changing Climate
edited by
submission deadline 20 Feb 2026 | Viewed by 110 | Submission Open
Keywords: recycled water; wastewater; treatment; emerging pollutants; plant uptake; bioaccumulation; technology; climate resilience; climate change; economics; environmental impacts
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Management and Sustainable Control of Harmful Algal Blooms
edited by Ofir Tal and Yael Amitai
submission deadline 20 Feb 2026 | Viewed by 104 | Submission Open
Keywords: cyanoHABs; harmful algal blooms (HABs); modeling; causal inference; monitoring; ecological restoration; sus-tainable control; climate change; decision– support; remote sensing
(This special issue belongs to the Section Water Quality and Contamination)
Water Quality Analytics in the Digital Era: Methods, Models and Management submission deadline 20 Feb 2026 | Viewed by 104 | Submission Open
Keywords: water quality; pollutants; micropollutans; trend analysis; data analysis; machine learning; big data; water management
(This special issue belongs to the Section Water Quality and Contamination)
Hydrogeomorphic Hazards: Modeling, Mapping, and Mitigation of Rainfall-Triggered Landslides
edited by , and Zhilu Chang
submission deadline 20 Feb 2026 | Viewed by 79 | Submission Open
Keywords: rainfall-triggered landslides; hydrogeomorphic hazards; landslide modeling; hazard mapping; risk mitigation; remote sensing; GIS; early warning systems; climate change impacts; slope stability
(This special issue belongs to the Section Hydrogeology)
Advances in Water and Stormwater Networks: Modelling and Pollutant Degradation, 2nd Edition
edited by , Yuqiong Gao and Yunshu Zhang
submission deadline 23 Feb 2026 | 2 articles | Viewed by 2067 | Submission Open
Keywords: urban water contamination; disinfection byproducts; advanced oxidation; bioremediation; network leakage simulation; urban hydrology and modeling
(This special issue belongs to the Section Urban Water Management)
Ecohydrology in the Context of Climate Change: Strategies for Management, Monitoring, and Modeling submission deadline 25 Feb 2026 | 9 articles | Viewed by 12200 | Submission Open
Keywords: ecohydrology; hydrological cycle; ecosystems services; drought and floods; soil erosion
(This special issue belongs to the Section Ecohydrology)
Using Economics for Sustainability, Effective Management, and Conflict Resolution in Water
edited by Puiu Lucian Georgescu and
submission deadline 25 Feb 2026 | 1 articles | Viewed by 9520 | Submission Open
Keywords: water economics; sustainability; water resources governance; water use efficiency; nature-based solutions; blue and green infrastructures; climate change; innovative financing for water resources; transboundary cooperation; smart technologies; AI in water management
(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 Feb 2026 | 6 articles | Viewed by 7378 | Submission Open
Keywords: ecological wastewater treatment; resource utilization; plant restoration; microorganism transformation; adsorption
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Freshwater Ecosystems—Biodiversity and Protection: 2nd Edition submission deadline 25 Feb 2026 | 4 articles | Viewed by 4058 | Submission Open
Keywords: freshwater communities; α ; β ; γ diversity; biotic indicators; water quality assessment; anthropogenic influence; ecotoxicology; metacommunity; invasive species; non-wadeable rivers; conservation; barcoding
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Emerging Technologies for Nutrient Recovery and Wastewater Treatment
edited by Jagdeep Kumar Nayak and
submission deadline 25 Feb 2026 | 2 articles | Viewed by 3935 | Submission Open
Keywords: nutrient recovery; wastewater treatment; bioelectrochemical systems; membrane technology; resource recycling; circular economy; microbial fuel cells; sustainable water management; algae-based systems; constructed wetland techno-economic analysis
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Innovations in Hydrology: Streamflow and Flood Prediction
edited by Zhaocai Wang
submission deadline 25 Feb 2026 | 2 articles | Viewed by 3268 | Submission Open
Keywords: streamflow prediction; flood prediction; physical hydrological models; machine learning; deep learning; uncertainty quantification; flood risk assessment; water resource management
(This special issue belongs to the Section Hydrology)
Emerging Contaminants in Natural and Engineered Water Environments: Environmental Behavior, Ecological Effects and Control Strategies, 2nd Edition
edited by , Xiaodong Li and
submission deadline 25 Feb 2026 | 3 articles | Viewed by 3202 | 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)
Drought Evaluation Under Climate Change Condition
edited by Yanfeng Wu
submission deadline 25 Feb 2026 | 2 articles | Viewed by 2182 | Submission Open
Keywords: climate change; drought evaluation; water resources management; agricultural impacts; ecosystem resilience; socio-economic consequences; remote sensing for drought; modeling drought; adaptation strategies; sustainable development
(This special issue belongs to the Section Hydrology)
Monitoring and Degradation of Drugs and Organic Pollutant in Wastewater submission deadline 25 Feb 2026 | 1 articles | Viewed by 973 | Submission Open
Keywords: emerging pollutants; persistent; mobile; and toxic compounds; high-resolution mass spectrometry; transformation products; extraction and preconcentration techniques
(This special issue belongs to the Section Wastewater Treatment and Reuse)
Data-Driven Intelligent Systems in Flood Forecasting and Early Warning Flood Systems
edited by and Farzad Piadeh
submission deadline 25 Feb 2026 | Viewed by 954 | Submission Open
Keywords: machine aritificial intelligence; data mining; early warning systems; flood risk assessment learning; real-time modelling; visualisation
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Application of Artificial Intelligence Monitoring and Big Data Analysis in Marine Resource Management
edited by
submission deadline 25 Feb 2026 | 1 articles | Viewed by 549 | Submission Open
Keywords: marine environmental monitoring; modeling; AI applications; digital economy; marine ranching
(This special issue belongs to the Section Oceans and Coastal Zones)
Water Engineering Safety and Management, 2nd Edition
edited by Qiubing Ren, Shaowei Wang, Xudong Chen and
submission deadline 25 Feb 2026 | Viewed by 215 | Submission Open
Keywords: water engineering; safety management; optimization of design; intelligent construction; operation and maintenance; health diagnosis; risk assessment; numerical simulation; soft computing
(This special issue belongs to the Section Hydraulics and Hydrodynamics)
Intelligent Regulation and Adaptive Management of Complex River Basin Systems
edited by Yu Zhang
submission deadline 25 Feb 2026 | Viewed by 201 | Submission Open
Keywords: river basin socio-hydrological system; extreme hydrological events and non-stationarity (extreme rainstorms/droughts); three-waters coupling (water resources– environment– ecology); intelligent adaptive management; reservoir– lake– river system; digital twin and AI technologies; climate-adaptive water resource allocation
(This special issue belongs to the Section Water Resources Management, Policy and Governance)
Experimental and Modeling Analysis of Ecosystem Service Value in Natural and Man-Made Vegetated Water Bodies submission deadline 25 Feb 2026 | Viewed by 161 | Submission Open
Keywords: ecohydraulics; ecosystem services; field experiments; modeling; vegetated areas; water quality; water resources management
(This special issue belongs to the Section Ecohydrology)
Advances in Watershed Hydrology: Integrating Process Understanding and Predictive Modeling submission deadline 25 Feb 2026 | Viewed by 145 | Submission Open
Keywords: watershed hydrology; hydrological modeling; uncertainty analysis; surface and subsurface processes; sediment transport; flood forecasting; machine learning in hydrology; hydrological signal analysis; model development and calibration; watershed-scale simulation
(This special issue belongs to the Section Hydrology)
Effect of Biological Invasion on Aquatic Ecosystems
edited by Jay Stauffer
submission deadline 25 Feb 2026 | Viewed by 106 | Submission Open
Keywords: aquatic biodiversity; invasive species; biological invasions; ecosystem functioning; anthropogenic impacts; marine environment
(This special issue belongs to the Section Biodiversity and Functionality of Aquatic Ecosystems)
Monsoon Environmental Changes and Fluvial Sedimentation Processes
edited by Baosheng Li
submission deadline 25 Feb 2026 | Viewed by 102 | Submission Open
Keywords: arid and semi-arid regions; monsoon climate; surface water processes; sedimentary facies; ecological and environmental changes
(This special issue belongs to the Section Water and Climate Change)
Advancing Smart Agricultural Water Management: Integrating Technologies, Irrigation and Plant Ecophysiology for a Sustainable Future
edited by
submission deadline 25 Feb 2026 | Viewed by 92 | Submission Open
Keywords: smart and precision irrigation; plant– soil– water interactions; water use efficiency; digital agriculture (IoT; AI; Remote Sensing); plant ecophysiology under water stress; smart irrigation automation and decision support systems; renewable energy integration; climate-smart agriculture and drought resilience; socioeconomic and technological adoption barriers; circular water economies
(This special issue belongs to the Section Water, Agriculture and Aquaculture)
Big Data and Machine Learning for Hydrology Research: Methods, Applications and Future Directions submission deadline 27 Feb 2026 | 1 articles | Viewed by 842 | Submission Open
Keywords: machine learning; deep learning architectures; hydrological forecasting; large-sample hydrology studies; multi-source data fusion; big data; explainable AI; physics-informed machine learning; digital twins in water systems; uncertainty quantification
(This special issue belongs to the Section New Sensors, New Technologies and Machine Learning in Water Sciences)
Environmental Fate and Transport of Organic Pollutants in Water
edited by Tengyi Zhu, and
submission deadline 28 Feb 2026 | 5 articles | Viewed by 13039 | Submission Open
Keywords: organic pollutants; environmental risk assessment; fate and transport; remediation and mitigation; heavy metals; bioremediation; anaerobic digestion; stormwater management; conventional and emerging contaminants; water environment simulation; ecological remediation
(This special issue belongs to the Section Water Quality and Contamination)
Water and Soil Pollution from Agriculture: Mechanisms, Assessments and Mitigation Strategies submission deadline 28 Feb 2026 | 4 articles | Viewed by 5945 | Submission Open
Keywords: pollution sources and contaminants; transport and environmental behavior; monitoring and assessment; ecological and health impacts; mitigation and sustainable practices; policy and socioeconomics; emerging technologies
(This special issue belongs to the Section Soil and Water)
Water Safety, Ecological Risk and Public Health
edited by Qiuda Zheng and
submission deadline 28 Feb 2026 | 3 articles | Viewed by 4027 | Submission Open
Keywords: biomarkers of public health; waterborne pathogens; wastewater-base epidemiology; water safety; ecological risk assessment; emerging contaminants
(This special issue belongs to the Section Water and One Health)
Hydrogeological and Hydrochemical Investigations of Aquifer Systems
edited by
submission deadline 28 Feb 2026 | 2 articles | Viewed by 2824 | Submission Open
Keywords: hydrogeophysical exploration; groundwater; hydrogeological modelling; aquifer; hydrochemical modelling
(This special issue belongs to the Section Water Quality and Contamination)
Hydrological Hazards: Monitoring, Forecasting and Risk Assessment submission deadline 28 Feb 2026 | 1 articles | Viewed by 2216 | Submission Open
Keywords: hydrological hazards; flood forecasting; risk management; modelling; drought assessment; water resources; hydrological monitoring; precipitation; remote sensing and GIS analysis; climate change; geomorphology dynamics; hydroinformatics
(This special issue belongs to the Section Hydrology)
Pollution Process and Microbial Responses in Aquatic Environment
edited by and Wei Huang
submission deadline 28 Feb 2026 | 2 articles | Viewed by 2142 | Submission Open
Keywords: aquatic environment; nutrient; heavy mentals; antibiotics; pfass; migration and transformation; microbial community; influencing mechanism
(This special issue belongs to the Section Water Quality and Contamination)
Advancing Sustainable Hydrological Modelling and Smart Water Resource Management
edited by , Wenzhuo Wang and Jitao Zhang
submission deadline 28 Feb 2026 | 2 articles | Viewed by 1428 | Submission Open
Keywords: climate change; sustainable hydrological modelling; smart water resource management; machine learning; model integration; real-time decision making; data-driven approaches; adaptive basin management
(This special issue belongs to the Section Hydrology)
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