数字农科院2.0

Unraveling long-term water consumption changes and agro-ecological responses to agricultural practices in arid irrigation districts of the upper Yellow River basin (2000–2021)

文献类型： 外文期刊

作者： Xinyi Li;Pu Wang;Jiaxin Mu;Danning Mu;Chen Sun;Zhengzhong Li;Dongyang Ren;Zailin Huo;Xu Xu

作者机构：

关键词： Agricultural ecological environments;Agricultural management;Groundwater depth;Regional water consumption

期刊名称： Journal of Hydrology

ISSN： 0022-1694

年卷期： 2025 年 658 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Understanding the effects of agricultural practices on water consumption (evapotranspiration, ET) and agroecology in irrigation districts of the upstream regions is essential for efficient agricultural management for the entire Yellow River basin (YRB). In this study, an integrated framework involving remote sensing, field surveys, and Mann-Kendall trend analysis was proposed to comprehensively analyze the variations of ET and agroecology over the past two decades and reveal their responses to agricultural practices. The Hetao Irrigation District, a super-large irrigation district in the upper YRB, was selected as the study area. Particularly, long-term and high-precision datasets were produced to support our analysis. Analyzes unveiled the long-term variations of the agroecosystem and their responses to agricultural practices, presenting for the first time a comprehensive picture of changes in the irrigated agroecosystems of the upper YRB. Results indicated that pursuing high profits has led to an expansion of high-profit crops and a significant reduction of low-profit crops. This resulted in noticeable changes in irrigation regimes and even led to a reduction of growing season ET (about 10 %) and an increase of non-growing season ET (about 20 %). The above changes caused the noticeable decline (over 0.10 m/year average) in groundwater levels, further bringing dual influences, i.e., positive effects on natural land but negative impacts on wetland. We found that the spatial distributions of declining groundwater were especially consistent with the significant change areas of the indices. Finally, the core of sustainable management and priority practices were proposed for irrigation districts of the upper YRB.

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