Arid Zone Research ›› 2024, Vol. 41 ›› Issue (6): 928-939.doi: 10.13866/j.azr.2024.06.03

• Land and Water Resources • Previous Articles     Next Articles

Analysis of runoff changes and attribution in the main stream of Zuli River in the past 65 years

LIANG Shuanghe(), NIU Zuirong(), JIA Ling   

  1. College of Water Resources and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, Gansu, China
  • Received:2023-10-10 Revised:2024-04-18 Online:2024-06-15 Published:2024-07-03

Abstract:

Based on the measured annual and monthly runoff data of Huining, Guochengyi and Jingyuan stations in the main stream of Zuli River from 1957 to 2021, the variation characteristics and driving factors of runoff at different time scales in Zuli River Basin were analyzed by linear tendency estimation, Mann-Kendall test and wavelet analysis. The results showed that: which are mainly influenced by human activities and climatic factors. (1) The runoff of the main stream of the Zuli River showed a decreasing trend from 1957 to 2021, and the runoff has decreased by 52.9% over the past 30 years. (2) The measured annual runoff of the three hydrological stations of Huining, Guochengyi, and Jingyuan underwent abrupt changes in 1992, 1984, and 1994, respectively. (3) Runoff and precipitation showed similar cycles of abundant and low state at the three stations of the main stream of Zuli River. The analysis results show that the reduction of measured annual runoff in the main stream of the Zuli River is mainly affected by human activities such as soil and water conservation measures, followed by climatic factors such as the reduction of precipitation, of which human activities and climate change contribute to the reduction of runoff by 74.47% and 25.53%, respectively.

Key words: human activities, climate change, runoff, attribution analysis, main stream of Zuli River