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<p>Assessing the water yield function of a river basin is crucial for hydrological ecosystem protection. This research took the Nansihu River Basin as a case and evaluated its water yield from 2000 to 2022. The results showed that: (1) Water yield decreased 33.51% over the 20 years, from 369.91&#xa0;mm to 220.06&#xa0;mm, with the peak occurring in 2005. Both precipitation and evapotranspiration were positively correlated with water yield and exhibited similar trends and spatial distributions. (2) Water yield declined from the eastern mountainous areas to the western plains, with significant reductions ranging from − 200 to -100&#xa0;mm in the western plains, while the central area remained stable. (3) Climatic factors significantly impacted water yield, and LULC determined its distribution. Non-natural areas produce three times the water yield of natural areas. These results are instrumental in guiding water resource management strategies within the basin.</p>

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Evaluation on water yield service in Nansihu River Basin of China during the recent 20 years

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年5月21日

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  • Wei Zhang,
  • Difei Zhao,
  • Dandan Liu

摘要

Assessing the water yield function of a river basin is crucial for hydrological ecosystem protection. This research took the Nansihu River Basin as a case and evaluated its water yield from 2000 to 2022. The results showed that: (1) Water yield decreased 33.51% over the 20 years, from 369.91 mm to 220.06 mm, with the peak occurring in 2005. Both precipitation and evapotranspiration were positively correlated with water yield and exhibited similar trends and spatial distributions. (2) Water yield declined from the eastern mountainous areas to the western plains, with significant reductions ranging from − 200 to -100 mm in the western plains, while the central area remained stable. (3) Climatic factors significantly impacted water yield, and LULC determined its distribution. Non-natural areas produce three times the water yield of natural areas. These results are instrumental in guiding water resource management strategies within the basin.