• 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引(EI)收录期刊
ZHU Qiuan, WU Xiaoli, YU Dongxue, JIANG Shanhu, FANG Xiuqin, YAN Yiqi, REN Liliang. Quantitative impact of grassland cover change on water conservation in the Yellow River above Lanzhou[J]. Advances in Water Science, 2024, 35(4): 543-555. DOI: 10.14042/j.cnki.32.1309.2024.04.003
Citation: ZHU Qiuan, WU Xiaoli, YU Dongxue, JIANG Shanhu, FANG Xiuqin, YAN Yiqi, REN Liliang. Quantitative impact of grassland cover change on water conservation in the Yellow River above Lanzhou[J]. Advances in Water Science, 2024, 35(4): 543-555. DOI: 10.14042/j.cnki.32.1309.2024.04.003

Quantitative impact of grassland cover change on water conservation in the Yellow River above Lanzhou

Funds: 

the National Natural Science Foundation of China U2243203

the National Natural Science Foundation of China 42041005

More Information
  • Received Date: December 12, 2023
  • Published Date: June 05, 2024
  • A dynamic global vegetation model based on the annual land-use change data was used to quantify water conservation capacity with respect to grassland changes in the Yellow River above Lanzhou between 1980 and 2020 using different scenario simulations.The results showed that the average annual water conservation in this region was approximately 24.21 billion cubic meters, with grassland ecosystems contributing approximately 20.28 billion cubic meters, accounting for 83.8% of the total water conservation.Before 2002, the water conservation capacity exhibited a decline trend (-0.51 billion cubic meters per year).However, an increasing trend was observed after 2002 (0.35 billion cubic meters per year).Changes in the grassland in the Yellow River above Lanzhou, while having negligible negative impacts and no discernible regional differences, resulted in an annual reduction of 0.67 billion cubic meters in the regional water conservation volume between 2015 and 2020.Simulations were performed under scenarios representing different degrees of grassland degradation.The results showed that mild degradation caused changes in the components of grassland evapotranspiration, which in turn led to a slight increase in the regional water conservation volume; however, this effect decreased significantly as the degree of degradation increased.

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