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Watershed Ecohydrology and Water Quality Modeling

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Ecohydrology".

Deadline for manuscript submissions: closed (25 April 2026) | Viewed by 1879

Special Issue Editor


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Guest Editor
Human Environment Systems, Boise State University, Boise, ID, USA
Interests: watershed; ecohydrology; hydrologic modeling; water quality; contaminants

Special Issue Information

Dear Colleagues,

This Special Issue delves into the critical nexus of hydrological and ecological interactions within watersheds, seeking to advance our understanding and management capabilities through sophisticated modeling approaches. The convergence of enhanced computational power, rich datasets, and refined understanding of processes has catalyzed a new era of watershed modeling, capable of capturing the intricate interplay between biogeochemical cycles, ecohydrology, erosion, anthropogenic influences, and atmospheric drivers.

We invite submissions that explore ecohydrological processes at the watershed scale, particularly focusing on the application of physics-based, data-driven, or hybrid models. This Special Issue will highlight research that quantifies the impacts of land cover and climate change, alongside human infrastructure, on watershed hydrology, and water quality, encompassing nutrients, sediment, bacteria, and emerging contaminants. We encourage innovative modeling efforts that improve predictions of both traditional and emerging contaminants; integrate novel data sources, including remote sensing and qualitative data; enhance model structure and leverage advanced computational technologies; and model coupled surface and subsurface flow processes. This Special Issue aims to showcase cutting-edge research that bridges the gap between theoretical modeling and practical watershed management, fostering a deeper comprehension of these complex systems.

Dr. Tao Huang
Guest Editor

Manuscript Submission Information

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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

  • watershed
  • ecohydrology
  • hydrologic modeling
  • water quality
  • contaminants

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Published Papers (2 papers)

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Research

17 pages, 3626 KB  
Article
Simulation of Water Quality Impacts from Sewage Treatment Plant Discharges in a Reversing River: A Case Study of the Maoergang River
by Qiang Chu, Shitao Peng, Qing Zhao, Jianna Jia and Peng Zheng
Water 2026, 18(2), 184; https://doi.org/10.3390/w18020184 - 9 Jan 2026
Viewed by 485
Abstract
The impact of sewage discharge on water quality in reversing rivers has rarely received attention. This study simulated water quality changes in Maoergang River (a water body with counter flow conditions) affected by effluent discharge from Yangjiabu Sewage Treatment Plant. The results revealed [...] Read more.
The impact of sewage discharge on water quality in reversing rivers has rarely received attention. This study simulated water quality changes in Maoergang River (a water body with counter flow conditions) affected by effluent discharge from Yangjiabu Sewage Treatment Plant. The results revealed that the diffusion patterns of COD, NH4+-N, and TP in the study area were largely consistent; however, different hydrological conditions and discharge scenarios resulted in obvious differences in pollutant distribution. During the dry season, regardless of normal or counter folow conditions, the Maoergang and Xitiaoxi downstream were the primary affected segments. Regulated by hydrodynamic forces, under normal flow conditions, the Xitiaoxi downstream received a higher pollutant load while the Xitiaoxi upstream received minimal inputs. In the wet season, pollutant concentrations were generally lower due to the dilution effect of increased runoff; notably, the primary affected segments shifted to the downstream reaches of Maoergang and Huanchenghe. Under accidental discharge scenarios, excessive sewage release expanded the scope of pollution impacts, with elevated pollutant concentrations causing water quality non-compliance in parts of the upstream and downstream Xitiaoxi—both of which are within the germplasm resource protection zone. Predictive analysis indicated that when the sewage treatment plant’s discharge was reduced to 1.0 × 104 t·d−1, the receiving water bodies could still meet local water quality standards, even under the counter flow hydrological conditions, which pose the greatest threat to water quality during the dry season. Full article
(This article belongs to the Special Issue Watershed Ecohydrology and Water Quality Modeling)
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14 pages, 11645 KB  
Article
Changes of Ecosystem Service Value in the Water Source Area of the West Route of the South–North Water Diversion Project
by Zhimin Du, Bo Li, Bingfei Yan, Fei Xing, Shuhu Xiao, Xiaohe Xu, Yakun Yuan and Yongzhi Liu
Water 2025, 17(15), 2305; https://doi.org/10.3390/w17152305 - 3 Aug 2025
Viewed by 973
Abstract
To ensure water source security and sustainability of the national major strategic project “South-to-North Water Diversion”, this study aims to evaluate the spatio-temporal evolution characteristics of the ecosystem service value (ESV) in its water source area from 2002 to 2022. This study reveals [...] Read more.
To ensure water source security and sustainability of the national major strategic project “South-to-North Water Diversion”, this study aims to evaluate the spatio-temporal evolution characteristics of the ecosystem service value (ESV) in its water source area from 2002 to 2022. This study reveals its changing trends and main influencing factors, and thereby provides scientific support for the ecological protection and management of the water source area. Quantitative assessment of the ESV of the region was carried out using the Equivalence Factor Method (EFM), aiming to provide scientific support for ecological protection and resource management decision-making. In the past 20 years, the ESV has shown an upward trend year by year, increasing by 96%. The regions with the highest ESV were Garzê Prefecture and Aba Prefecture, which increased by 130.3% and 60.6%, respectively. The ESV of Xinlong county, Danba county, Rangtang county, and Daofu county increased 4.8 times, 1.5 times, 12.5 times, and 8.9 times, respectively. In the last two decades, arable land has decreased by 91%, while the proportions of bare land and water have decreased by 84% and 91%, respectively. Grassland had the largest proportion. Forests and grasslands, vital for climate regulation, water cycle management, and biodiversity conservation, have expanded by 74% and 43%, respectively. It can be seen from Moran’s I index values that the dataset as a whole showed a slight positive spatial autocorrelation, which increased from −0.041396 to 0.046377. This study reveals the changing trends in ESV and the main influencing factors, and thereby provides scientific support for the ecological protection and management of the water source area. Full article
(This article belongs to the Special Issue Watershed Ecohydrology and Water Quality Modeling)
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