Arid Zone Research ›› 2021, Vol. 38 ›› Issue (2): 494-503.doi: 10.13866/j.azr.2021.02.21

• Water Resources and Utilization • Previous Articles     Next Articles

Evolution characteristics of the headstream of the Hotan River headstream from 1957 to 2018

YU Qiying1(),ZHANG Jianghui2,BAI Yungang2(),WANG Shuo3,JIANG Zhu1,CAO Biao2,LU Zhenlin2   

  1. 1. School of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China
    2. Xinjiang Institute of Water Resources and Hydropower Research, Urumqi 830049, Xinjiang, China
    3. College of Water Conservancy and Architectural Engineering, Tarim University, Alar 843000, Xinjiang, China
  • Received:2020-09-11 Revised:2020-10-27 Online:2021-03-15 Published:2021-04-25
  • Contact: Yungang BAI E-mail:781832094@qq.com;xjbaiyg@sina.com

Abstract:

The evolution characteristics of river runoff are of great importance to the management and efficient use of water resources in a river basin. Based on 62 years (1957-2018) of runoff measurement data from Wuluwati station and Tongguziluoke station in the headstream area of the Hotan River, the evolution characteristics of its runoff were assessed using linear trend tests, Mann-Kendall trend tests, and rescaled range analysis. These evolution characteristics were analyzed on four time scales including seasons and months. Results showed that the interdecadal variation characteristics of runoff at Wuluwati station and Tongguziluoke station were the same: Both had experienced a “normal water year-preferential wet year” and the annual runoffs at both stations were equal (they showed a nonsignificant increasing trend). The mutation points of the runoff sequence were all in 2009 and the future annual runoff is predicted to continue to increase for a certain period. The summer and autumn runoff changes at Wuluwati station had the greatest impact on annual runoff, whereas the summer runoff at Tongguziluoke station had the greatest impact on annual runoff. Finally, the distribution of runoff during the year was uneven; it was mainly concentrated in May-September, which accounted for 86.11%-90.86% of runoff, indicating a trend for “dry winters and flooding in summer”.

Key words: Hotan River, linear trend, runoff change, Mann-Kendall test, rescaled range analysis