堵河水沙变化特征及成因分析

Analysis of Characteristics and Causes of Water Discharge and Sediment Load Changes of Duhe River

以堵河黄龙滩水文站多年水文数据为基础,运用M-K趋势检验,小波分析和回归分析方法等,分析了堵河水沙的变化特性及其成因。堵河年输沙量总体呈波动下降趋势,人为活动特别是水库建设是年内径流分配变化的主要原因,而输沙量则受到径流量、大型水库、水土保持工程的综合影响。

Based on the perennialhy drological data in Huanglongtan hydrological station,we adopted Mann- Kendall trend test,wavelet analysis and regression analysis methods in the analysis of the characteristics of the changes and causes of the sand blocking. The analysis of the variation of the monthly run off in Huanglongtan Hydrologic Station,in response to the sediment,showed a downward trend in the volatility. The further analysis showed that the human activities especially the reservoir construction was the main reason for the change of the runoff distribution in a year,and the sediment transport was effected jointly by the runoff,the reservoir and the water and soil conservation engineering.