CollectHomepage AdvertisementContact usMessage

Arid Land Geography ›› 2022, Vol. 45 ›› Issue (1): 17-26.doi: 10.12118/j.issn.1000–6060.2021.212

• Hydrology and Water Resources • Previous Articles     Next Articles

Runoff change and its driving factors in Jinghe River Basin in recent 70 years

LIU Yu1,2,3,4(),GUAN Zilong2,3,4,TIAN Jiyang1(),LIU Ronghua1,GUAN Ronghao5   

  1. 1. Research Center on Flood and Drought Disaster Reduction of Ministry of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
    2. Power China Northwest Engineering Corporation Limited, Xi’an 710054, Shaanxi, China
    3. School of Water and Environment, Chang’an University, Xi’an 710054, Shaanxi, China
    4. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Chang’an University, Xi’an 710054, Shaanxi, China
    5. College of Water Resources and Architecture Engineering, Northwest A & F University, Yangling 712100, Shaanxi, China
  • Received:2021-05-07 Revised:2021-07-01 Online:2022-01-25 Published:2022-01-21
  • Contact: Jiyang TIAN E-mail:liuyu961030@163.com;tjyshd@126.com

Abstract:

Quantitative evaluation and attribution identification of runoff change characteristics are the basis for the rational development and utilization of water resources in response to climate change. This study examines the hydrological and meteorological element change characteristics of the Jinghe River Basin in China over the last 70 years, using the M-K test, sliding t-test, wavelet analysis, and other methods to assess the contribution of climate change and human activities to runoff changes based on Budyko assumptions. The results show that: (1) The annual runoff depth of the Jinghe River Basin decreased at a rate of 0.41 mm·a-1, and the abrupt change occurred in 1996, which decreased by 43.49% compared with that before the abrupt change. (2) The characteristic time scales for the first, second, and third main periods of annual runoff depth were 41 a, 58 a, and 15 a, respectively. (3) During flood season, runoff variation is sensitive to both precipitation and potential evapotranspiration, with precipitation sensitivity ranging from 2.3 to 5.3 times that of potential evapotranspiration. (4) Human activities are the main influencing factor of runoff variation in the basin, contributing 90.43%, 63.75%, and 94.08% to annual, flood season, and nonflood season runoff variation, respectively. The findings of the study can serve as a scientific foundation for the comprehensive management and scientific deployment of regional water resources and serve as a guide for the control of soil erosion in the Loess Plateau.

Key words: runoff changes, human activity, climate change, Budyko assumptions, Jinghe River Basin