浙江省主要河流水沙特征及变化趋势分析

以浙江省主要河流为研究对象,选取11个水文控制站1956~2013年的水沙序列资料,对径流、悬移质泥沙输沙量进行年内变化、年际变化、代际变化的特征分析。运用改进的M-K趋势检验及线性滑动回归分析等方法,系统分析了6大主要河流水沙变化趋势。研究表明:水沙年内、年际变化有一定的相关性,泥沙的变化幅度大于径流的变化幅度,径流变化趋势不显著,但73%的水文控制站的输沙量呈显著下降趋势。

Change Trend of Runoff and Sediment Characteristics of Important Rivers in Zhejiang Province

Taking the importent rivers in Zhejiang Province as the research object, water and sediment series data from 1956 to 2013 of 11 the hydrology stations were chosen to analyze the characteristics of the intraannual, interannual, and decade variations of the runoff and suspended sediment discharge. The methods such as the improved Mann - Kendall (M - K) trend test and linear sliding regression method were used to systematically analyze the runoff and sediment variation of the 6 major rivers. The results show that the intraannual and interannual variations of the runoff and sediment have certain corelation; the change amplitude of sediment is greater than that of the runoff; the trend of runoff variation is not significant, however, the sediment discharge of seventy-three percent of the hydrological stations decreased significantly.