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<p>Studying runoff characteristics and quantifying human activities’ impact on northern Shaanxi, a crucial mineral resource area in China, is crucial to alleviate water resource contradictions. In this study, hydrological element trends were analyzed using the β-z-h three-parameter indication method. The Mann-Kendall, Pettitt, moving T, and Yamamoto methods were used to test the mutation point of hydrological elements. The Budyko framework was used to quantitatively assess the impacts of climate change and multiple human activities on runoff reduction. The results showed that (1): Precipitation (PRE), potential evapotranspiration (E<sub>0</sub>), and temperature (TEM) showed increasing trends; runoff in the Huangfuchuan, Gushanchuan, Kuye River, Tuwei River, Wuding River, Qingjian River, and Yanhe River catchments showed decreasing trends (HFC, GSC, KYR, TWR, WDR, QJR, YR); whereas runoff in the Jialu River (JLR) catchment showed a “V-shaped” trend from 1980 to 2020. (2) Runoff was positively correlated with PRE and negatively correlated with E<sub>0</sub> and the subsurface index (n), with the elasticity coefficients of PRE, E<sub>0</sub>, and n showing an increasing trend in the change period. (3) Human activities were a key factor in runoff reduction, although the impact of different human activities showed spatial variations. This study provides a scientific foundation for achieving the sustainable development of water resources in mining areas.</p>

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Climate change and human activities on runoff in northern Shaanxi: Based on Budyko framework analysis

  • 期刊论文

  • 发表日期：

    2025年5月9日

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  • Lin Zhang,
  • Xiaohui Jiang,
  • Fangbing Xu,
  • Anle Yang

摘要

Studying runoff characteristics and quantifying human activities’ impact on northern Shaanxi, a crucial mineral resource area in China, is crucial to alleviate water resource contradictions. In this study, hydrological element trends were analyzed using the β-z-h three-parameter indication method. The Mann-Kendall, Pettitt, moving T, and Yamamoto methods were used to test the mutation point of hydrological elements. The Budyko framework was used to quantitatively assess the impacts of climate change and multiple human activities on runoff reduction. The results showed that (1): Precipitation (PRE), potential evapotranspiration (E0), and temperature (TEM) showed increasing trends; runoff in the Huangfuchuan, Gushanchuan, Kuye River, Tuwei River, Wuding River, Qingjian River, and Yanhe River catchments showed decreasing trends (HFC, GSC, KYR, TWR, WDR, QJR, YR); whereas runoff in the Jialu River (JLR) catchment showed a “V-shaped” trend from 1980 to 2020. (2) Runoff was positively correlated with PRE and negatively correlated with E0 and the subsurface index (n), with the elasticity coefficients of PRE, E0, and n showing an increasing trend in the change period. (3) Human activities were a key factor in runoff reduction, although the impact of different human activities showed spatial variations. This study provides a scientific foundation for achieving the sustainable development of water resources in mining areas.