Natural or Artificial Water Reservoirs' Impacts on Mitigating the Intensities of Floods and Droughts

A special issue of Hydrology (ISSN 2306-5338). This special issue belongs to the section "Water Resources and Risk Management".

Deadline for manuscript submissions: 1 December 2025 | Viewed by 690

Special Issue Editor

Special Issue Information

Dear Colleagues,

Global warming is reflected everywhere in the increase and frequency of extreme hydrological events (floods and droughts). One of the means to mitigate the impacts of these extreme hydrological events is the retention of large volumes of water in natural or artificial reservoirs during floods on the one hand, and their support for the flow of watercourses downstream during intense and prolonged droughts on the other hand. The objective of this Special Issue is to bring together studies that demonstrate the contribution of natural or artificial water reservoirs to mitigate the downstream impacts of floods and droughts. It is based on studies relating to a single or numerous water reservoirs constructed on the scale of a single or several watersheds. In addition, studies relating to the problem of the stability of artificial structures (dams, dikes, etc.) of water reservoirs in the context of the increase in the intensity and frequency of floods in the short, medium, and long term terms will be welcome. Finally, the impacts of this water storage by these natural and/or artificial reservoirs during these extreme hydrological events on natural and anthropized ecosystems, as well as on human behavior, will also be favorably welcomed.

We look forward to receiving your original research articles and reviews.

Prof. Dr. Ali A. Assani
Guest Editor

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Keywords

  • floods
  • low levels
  • drought
  • natural and artificial dams
  • natural and artificial reservoirs
  • wetlands
  • lakes
  • dikes
  • river channels

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Published Papers (1 paper)

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Research

21 pages, 4960 KiB  
Article
Evaluating Expert Opinion-Based Reservoir Operation in Cfa/Csa Climatic Conditions
by Mahdi Sedighkia and Bithin Datta
Hydrology 2025, 12(2), 28; https://doi.org/10.3390/hydrology12020028 - 6 Feb 2025
Viewed by 537
Abstract
This study evaluates the application of an expert opinion-based fuzzy method for reservoir operation in humid subtropical climate/hot-summer Mediterranean climatic classes (Cfa/Csa in the Köppen–Geiger climate classification system), which are characterized by humid subtropical to Mediterranean conditions with ample rainfall and seasonal water [...] Read more.
This study evaluates the application of an expert opinion-based fuzzy method for reservoir operation in humid subtropical climate/hot-summer Mediterranean climatic classes (Cfa/Csa in the Köppen–Geiger climate classification system), which are characterized by humid subtropical to Mediterranean conditions with ample rainfall and seasonal water availability challenges. Effective reservoir management in these regions is critical for balancing water storage and downstream release and maintaining ecosystem health under variable hydrological conditions. The performance of the fuzzy method was compared to two meta-heuristic algorithms: gravitational search algorithm (GSA) and shuffled frog leaping algorithm (SFLA). System performance was assessed using key indices such as the reliability index as a measure of meeting water demands. The fuzzy method achieved the highest reliability index of 0.690, outperforming GSA (0.677) and SFLA (0.688), demonstrating its superior ability to ensure consistent water supply downstream. The fuzzy method, leveraging expert knowledge, not only enhanced downstream water supply reliability but also reduced computational time compared to the meta-heuristic approaches. The incorporation of expert opinions provides a practical, robust, and efficient framework for reservoir management in challenging climate conditions such as Cfa/Csa classes. Additionally, the fuzzy solution demonstrated superior adaptability to diverse hydrological conditions, balancing ecological and water supply needs effectively. These findings highlight the potential of using expert opinions to support sustainable reservoir operations by achieving optimal trade-offs between competing objectives and addressing challenges in water resource management under varying climatic conditions. Full article
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