JOURNAL OF NATURAL RESOURCES ›› 2012, Vol. ›› Issue (7): 1124-1137.doi: 10.11849/zrzyxb.2012.07.005

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS • Previous Articles     Next Articles

Hydrologic Alteration Analysis in the Guanzhong Reach of the Weihe River

WU Wei, XU Zong-xue, LI Fa-peng   

  1. Key Laboratory of Water and Sediments Sciences, Ministry of Education, College of Water Sciences, Beijing Normal University, Beijing 100875, China
  • Received:2011-06-20 Revised:2011-12-05 Online:2012-07-20 Published:2012-07-20

Abstract: The Guanzhong Reach is the center of Weihe River Basin, and ecosystem has been disturbed greatly, which impact the economic development in this area. Flow data at Linjiacun, Weijiabao, Xianyang, Lintong and Huaxian stations of the Weihe River are analyzed in this paper, which are the most important stations in the Guanzhong Reach of the Weihe River. Change points are detected by using Sequential Cluster Analysis. Based on the change point analysis, the degrees of hydrologic alteration are analyzed by RVA(Range of Variability Approach) method, and hydrologic parameters that have altered greatly are determined. Results show that the change points are detected in 1986. It implies that the hydrologic regime before 1986 may be more close to natural state, while the hydrologic regime after 1986 has changed greatly because of intense human activity. Supposed that the hydrologic series before 1986 represents the hydrologic regime of pre-impact period, and that after 1986 for post-impact period. According to range of variability analysis, different hydrologic parameters show different alterations. On the whole, the hydrologic regime at five stations has changed obviously, especially that at Linjiacun, Weijiabao and Xianyang stations. These analyses facilitate understanding of hydrologic alteration in the Weihe River, and may be helpful for estimation of environmental flow.

Key words: RVA, hydrologic regime, change point, hydrologic alteration

CLC Number: 

  • P333.5