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<p>Groundwater reservoirs, as aquifer-based water regulation systems, play an important role in alleviating water scarcity and enhancing water-resource resilience in arid regions. However, compared with surface reservoirs, systematic quantitative methods for evaluating groundwater reservoir construction suitability remain limited. Using the Tailan River Basin in Wensu County, Aksu Prefecture, Xinjiang, northwestern China, as a case study, this study developed a physically constrained multisource weighted TOPSIS (PMW–TOPSIS) model that integrates geospatial analysis with multicriteria decision-making to assess groundwater reservoir construction suitability. The study area was divided into five primary evaluation zones, and a 12-indicator system was established from four dimensions: storage conditions, water source conditions, extraction conditions, and ecological constraints. Indicator values were normalized, and comprehensive weights were derived by integrating AHP weights, entropy weights, and physically constrained weights before TOPSIS ranking was applied. The results show that high-, medium-, and low-suitability areas account for 35.7%, 57.1%, and 7.1% of the study area, respectively. Among all subzones, III2 showed the highest suitability (Ci = 0.7327), whereas V2 showed the lowest suitability (Ci = 0.3284). Zones I and V exhibited relatively low suitability because of unfavorable groundwater depth conditions, relatively high salinity, and ecological or management constraints. The results indicate that the PMW–TOPSIS model provides a scientifically grounded basis for groundwater reservoir planning and sustainable groundwater management in arid inland basins.</p>

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Comprehensive evaluation of the suitability of groundwater reservoir construction in arid regions on the basis of the PMW–TOPSIS model: a case study of the Tailan River Basin, Xinjiang, China

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月6日

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  • Mingliang Du,
  • Bin Wu,
  • Yankun Liu,
  • Xiaofei Ma

摘要

Groundwater reservoirs, as aquifer-based water regulation systems, play an important role in alleviating water scarcity and enhancing water-resource resilience in arid regions. However, compared with surface reservoirs, systematic quantitative methods for evaluating groundwater reservoir construction suitability remain limited. Using the Tailan River Basin in Wensu County, Aksu Prefecture, Xinjiang, northwestern China, as a case study, this study developed a physically constrained multisource weighted TOPSIS (PMW–TOPSIS) model that integrates geospatial analysis with multicriteria decision-making to assess groundwater reservoir construction suitability. The study area was divided into five primary evaluation zones, and a 12-indicator system was established from four dimensions: storage conditions, water source conditions, extraction conditions, and ecological constraints. Indicator values were normalized, and comprehensive weights were derived by integrating AHP weights, entropy weights, and physically constrained weights before TOPSIS ranking was applied. The results show that high-, medium-, and low-suitability areas account for 35.7%, 57.1%, and 7.1% of the study area, respectively. Among all subzones, III2 showed the highest suitability (Ci = 0.7327), whereas V2 showed the lowest suitability (Ci = 0.3284). Zones I and V exhibited relatively low suitability because of unfavorable groundwater depth conditions, relatively high salinity, and ecological or management constraints. The results indicate that the PMW–TOPSIS model provides a scientifically grounded basis for groundwater reservoir planning and sustainable groundwater management in arid inland basins.