近50年来中国六大流域年际径流变化趋势研究

Study on runoff trends of the six larger basins in China over the past 50 years

应用1950年以来的中国六大流域19个重点控制水文站年径流观测资料,采用MK检验方法研究了中国六大江河的年径流量变化情况。结果表明,近50年来中国六大江河的实测径流量均呈下降趋势。其中海河、黄河、辽河、松花江实测径流量下降明显,严重影响了我国社会经济的发展。

Based on the observed streamflow of 19 key hydrological control stations in the six larger basins in China for the past 50 years, this study employed the Mann-Kendall test to detect trends of annual runoff. It was found that annual runoff in the six larger basins has generally decreased during the periods, with signicant decreases detected in the northern China. Especially in Haihe river, Yellow river, Liaohe river and Songhuajiang river, there are remarkable decreasing trends.