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Based on the runoff data of Buha River Basin and Shaliu River Basin in Qinghai Lake Basin, the annual base-flow index was obtained by using the filter smoothing minimum method. The temporal and spatial variation of precipitation and the evolution law of base flow in this basin were analyzed by TFPW-MK method, and the influencing factors of base flow were analyzed. The results show that the base-flow index of Buha River Basin first increases, then decreases and increases, reaching the maximum in May and the minimum in August; The base flow index of Shaliu River Basin fluctuates and reaches the minimum in April. The annual average runoff in the Buha River Basin and the Shaliu River Basin showed a significant increasing trend, and both the annual average base flow and base flow index showed an insignificant increasing trend; The base flow inclination rate of the Buha River Basin is twice that of the Shaliu River Basin. The base flow sequence of the Buha River Basin and the Shaliu River Basin is greatly affected by precipitation, flow, drought index and evaporation, and the Shaliu River Basin is more significantly affected by evaporation.
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Basic Information:
DOI：10.20040/j.cnki.1000-7709.2023.20221012
China Classification Code:P333
Citation Information:
[1]JI Hai-juan,LI Xiao-dong,WANG Qing-xu ,et al.Study on Base-flow Evolution Law and Its Causes of Qinghai Lake Basin[J].Water Resources and Power,2023,41(07):19-22.DOI:10.20040/j.cnki.1000-7709.2023.20221012.
Fund Information:
青海省科技厅创新平台建设专项(2022-ZJ-Y11); 国家自然科学基金项目(41961012); 第二次青藏高原综合科学考察研究项目(2019QZKK0106); 青海省气象局面上项目(QXMS2022-45)
2022-05-14
2022
2023-05-06
2022-08-12
2022
1
2023-07-20
2023-07-20