摘要
基于祖厉河流域近 40年的实测资料点绘出年径流量、年输沙量双累积曲线 ,分析了该流域的泥沙变化规律 ;得出祖厉河年输沙量的大小是由流域的有效降水及祖厉河流域生态环境所决定 ;根据祖厉河的地理位置和其降水特点 ,提出从治理下垫面着手 ,加强林草建设、建立新型农业结构、改善生态环境。
Based on the practical data of nearly forty years,a double accumulated curve of annual flow and annual sediment runoff was drawn,and the laws of silt change in the reaches of the Zulihe River were analysed.A conclusion was made that the amount of annual sediment runoff of the River was determiaed by the useful fall and the natural environment.According to its geographical position and the feafures of mecipitation,proposals are pat forward which stress mainly on harnessing the underlying surface to build up the woodland , to set up a new structure of agriculture to improve the natural environment and to decrease the soil erosion.
出处
《甘肃科学学报》
2000年第2期69-72,共4页
Journal of Gansu Sciences
关键词
年径流量
年输沙量
下垫面
泥沙变化
祖厉河流域
annual flow
annual sediment runoff
double accumulated curve
underlyng surface
