Variation phases and its characteristics of hydrological regime of Qingjianhe River basin
WANG Guo-Qiang-；Long-Hui-；Jing-Xin-Ai-；Li-Hao-Bing
1.College of Water Resources and Environment, Hehai University, 290008, Nanjing;2.Yellow River Institute of Hydraulic Research, MWR;3.Hydrology Bureau of YRCC, MWR: 450003, Zhengzhou: China
Abstract：The representative rainfall gauge stations were selected firstly according to quantitative indexes and qualitative principle. And then, rainfall series from 1955 to 2002 which has good consistency was established based on the selected rainfall gauge stations. Adopting moving average method and serial cluster analysis method, hydrological series in the basin was divided into three phases according to annual runoff coefficient variation. Finally, variation characteristics of precipitation and runoff in each phase and the possible reasons which may cause runoff variation were further analyzed based on practical situation of soil and water conservation measures in each phase. And the results show that three divided phases of hydrological series are 1955-1979, 1980-1989, and 1990-2002. Comparing with rainfall and runoff in the first phase, annual precipitation and rainfall in the flood season from June to September in the second and the third phases have presented decreasing trends. Although runoff in the second phase is less than that in the first phase, runoff in the third phase is greater than that in the first two phases. Annual runoff amount and annual precipitation in each phase have bad positive correlation relationship. Hydrological regimes are up to characteristics of storm pattern, quantity and quality of soil and water conservation measures.
王国庆1,2；庞慧3；荆新爱2；李皓冰2. 清涧河流域的水文情势变化阶段及其特征[J]. 中国水土保持科学, 2005, 3(2): 23-27.
WANG Guo-Qiang-；Long-Hui-；Jing-Xin-Ai-；Li-Hao-Bing. Variation phases and its characteristics of hydrological regime of Qingjianhe River basin. SSWCC, 2005, 3(2): 23-27.
2005, Vol. 3 
