大清河流域径流变化趋势分析

采用1956—2016年长系列径流资料，选取大清河流域北支水系、南支水系及大清河下游的水文站、典型断面为研究对象，进行Mann-Kendall趋势检验，分析大清河年径流量的变化趋势。结果显示，白洋淀流域近54年的年降雨M-K统计值为-1.492,呈弱减少趋势。对规划实施前后各水文站年均径流量变化分析结果，海河流域综合规划(1993年)的实施对大清河中下游断面年径流量影响较大。

Trend of Runoff Changes in Daqing River Basin

Based on runoff; M-K trend test; Daqing River basinthe long-term series runoff data from 1956 to 2016, this paper selected the representative hydrological stations and typical sections of the the north and south water systems and the lower reaches of Daqing River to carry out Mann-Kendalll trend test, and analyze the change trend of annual runoff of Daqing River. The analysis results showed that the M-K value of annual rainfall in Baiyangdian basin in recent 54 years was -1.492, showing a weak decreasing trend. The implementation of the comprehensive planning of Haihe River basin (1993) had a significant impact on the annual runoff of the middle and lower reaches of Daqing River according to the comparative analysis of the annual runoff changes of each hydrological station.