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Recent Advances in Water Sciences Under a Variable and Changing Environment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Resources Management, Policy and Governance".

Deadline for manuscript submissions: 10 August 2026 | Viewed by 827

Special Issue Editors


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Guest Editor

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Guest Editor
School of Rural and Surveying Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: deterministic and stochastic analysis, modeling, management and prediction of groundwater resources; spatiotemporal analysis of groundwater quantity and quality; water resources management; applications in GIS; analysis, modeling and prediction of floods; hydraulic simulation of water distribution systems (DIS); design and supervision of hydrotechnical projects
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue comprises of general papers and papers to be presented at the 9th International Electronic Conference on Water Science (ECWS-9), which will be held from 11 to 14 November 2025. In the last few years, eight International Electronic Conferences on Water Sciences (ECWS-1, ECWS-2, ECW-3, ECWS-4, ECWS-5, ECWS-6, ECWS-7 and ECWS-8) have addressed a variety of important water-related issues. The ninth conference aims to explore and deliberate on the latest advancements in water sciences within a variable and evolving environment. ECWS-9 conference will be a forum to explore and discuss the following key issues: adaptive water resources management; enhancement of water security for humans, their economic activities and the environment; and formulation of new governance structures for water resources management and development.  The conference intends to assist in formulating innovative methodologies and produce recommendations for best practices and the building of institutions that can meet them.

We invite researchers from academic institutions, as well as water industry practitioners, to share their original research findings, novel ideas, scientific concepts, and new technologies and experiences. The Special Issue accepts contributions/papers in a wide range of ECWS-9 topics:

  • Hydrological Processes and Modelling;
  • Urban Water Modelling and Management;
  • River, Lake and Groundwater Hydraulics, Quality and Vulnerability;
  • Water Resources Management, Policy and Governance;
  • Extreme Hydro-meteorological Events: Sources, Mitigation and Adaptation;
  • Ecohydrological Approaches and Ecosystems Conservancy;
  • Remote Sensing, Artificial Intelligence and New Technologies in Water Sciences;
  • Wastewater Treatment and Reuse;
  • Agricultural Water Systems;
  • Glacier Hydrology and Climate Change.

The contributions will not only enhance the current Special Issue and conference but also lay a solid foundation for the future success of subsequent editions and conveyance of current knowledge on the topics.

Prof. Dr. Athanasios Loukas
Dr. Pantelis Sidiropoulos
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hydrology
  • climate change
  • groundwater
  • surface water
  • water resources quality
  • urban and agricultural water systems
  • water resources management, policy and governance
  • extreme hydrometeorological events
  • ecosystems conservancy
  • glacier hydrology
  • wastewater treatment and reuse

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (1 paper)

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Research

20 pages, 11919 KB  
Article
Optimized UAV-LiDAR Workflows for Fine-Scale Stream Network Mapping in Low-Gradient Wetlands: A Case Study of the Kushiro Wetland, Japan
by Waruth Pojsilapachai, Takehiko Ito and Tomohito J. Yamada
Water 2026, 18(6), 693; https://doi.org/10.3390/w18060693 - 16 Mar 2026
Viewed by 285
Abstract
Accurate delineation of stream networks in low-gradient wetlands remains challenging due to subtle topographic variation and dense vegetation cover. This study systematically evaluated 48 Unmanned Aerial Vehicle Light Detection and Ranging (UAV-LiDAR) processing workflows through 1128 pairwise comparisons to identify optimal approaches for [...] Read more.
Accurate delineation of stream networks in low-gradient wetlands remains challenging due to subtle topographic variation and dense vegetation cover. This study systematically evaluated 48 Unmanned Aerial Vehicle Light Detection and Ranging (UAV-LiDAR) processing workflows through 1128 pairwise comparisons to identify optimal approaches for mapping fine-scale channels in Japan’s Kushiro Wetland, a Ramsar-designated ecosystem. The workflows combined three ground filtering methods (Progressive Morphological Filter, Cloth Simulation Filter, Multiscale Curvature Classification), four interpolation techniques (Inverse Distance Weighting, Triangulated Irregular Network, Kriging, Multilevel B-spline Approximation), two sink-filling algorithms (Planchon & Darboux; Wang & Liu), and two flow direction models (D8, D-infinity). Performance was first assessed using pixel-based Intersection over Union (IoU) metrics to quantify inter-method consensus. Independent plausibility-based validation was then conducted using near-contemporaneous Sentinel-2 imagery. Although pairwise statistical analysis identified workflows that achieved high inter-method consensus (median IoU = 0.90), external validation demonstrated that the CSF-MBA-Planchon-D8 workflow provided the most realistic presentation of optically observable channel corridors (validation IoU ≈ 0.85). These findings reveal that high inter-method agreement does not necessarily imply accurate landscape representation; multiple workflows may converge on systematically biased solutions. Ground filtering exerted the strongest influence on pairwise consensus, whereas plausibility-based validation highlighted the importance of selecting workflow combinations that preserve subtle channel morphology. Sink-filling and flow direction choices exerted comparatively minor effects in this low-gradient setting. The proposed dual-validation framework provides methodological guidance for wetland restoration planning and highlights the necessity of external validation in LiDAR-derived hydrological feature extraction. Full article
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