Impacts of climate change and human activities on runoff in Weihe Basin based on Budyko hypothesis

3rd International Conference on Water Resource and Environment

地球科学;生态环境科学

Wu, H.S.^1 ; Liu, D.F.^1 ; Chang, J.X.^1 ; Zhang, H.X.^1 ; Huang, Q.^1

State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'An University of Technology, Xi'an

710048, China^1

关键词: Break-points;    Budyko formulas;    Contribution rate;    Human activities;    Mann-Kendall test;    Potential evapotranspiration;    Weihe rivers;    Yellow river;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/82/1/012063/pdf
DOI  :  10.1088/1755-1315/82/1/012063

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The Weihe River Basin (WRB) is the largest tributary of the Yellow River and plays an irreplaceable role in the Shaanxi-Gansu-Ningxia area. In recent years, owing to the human activities and climate change, the runoff of the WRB has reduced, wherefore, it is necessary to analyze the impact on runoff quantitatively. By using the data of Huaxian and Zhuangtou stations, we can respectively calculate the changes in runoff for climate change and human activities via Budyko hypothesis. The trend of runoff, precipitation, temperature, potential evapotranspiration and the break points are examined by Mann-Kendall test (M-K method), cumulative anomaly method and ordered cluster analysis. The results show that the break points of runoff series in WRB are 1970 and 1989, so that the runoff series can be divided into the baseline period and the changed period. Based on the data of potential evapotranspiration and Budyko formula, the contribution rates of climate change and human activities to runoff are 41% and 59% in 1970-1989. From 1990 to 2010, the contribution rates of climate change and human activities are 37% and 63%, respectively.