【摘要】 将水库淤积按沉积动力学特征分为河流沉积淤积和水库沉积淤积两种基本类型,相映建立了两种淤积动力模型。枯水期水库水位下降时,河流沉积淤积体较水库沉积淤积体有较大面积的出露,枯水期淤积面积构成了水库淤积体大小及淤积程度的重要侧面和重要参数,水库淤积程度是枯水期水库淤积面积的函数。结合陆地卫星TM图像,对研究区内的30个水库淤积状况统计后,按淤积程度离差分为三级:Ⅰ级,DEPDEV<-0 3;Ⅱ级,DEPDEV=-0 3～1;Ⅲ级,DEPDEV>1。对图像平面数据与水利部门实测的水库淤积量数据进行对比,发现图像数据与兴利库容以下实测数据协同性好。最后,分别在流域内及整个研究区域,对水库淤积程度的空间分布进行了分析。更多还原

【Abstract】 Divided reservoir silting,according to the sediment dynamics character, into two basic types of reservoir water dynamic silting and river water dynamic silting, and building two types of dynamic sediment model . When reservoir water level fall during unwatered period, river dynamic sediment body has more area than reservoir water dynamic sediment body, the silting area during unwatered period becomes the important parameter of the size of reservoir sediment body and the silting degree, the silting degree is the function of the ratio of the silting area for different reservoir during unwatered period. Combining Land-sat(tm) images, obtained some statistical data of 30 reservoirs, the silting degree was divided into three grades: Ⅰgrade, silting degree ( DEPDEV )<-0.3; Ⅱ grade, silting degree DEPDEV =-0.3～1; Ⅲ grade, silting degree DEPDEV >1. Finally, established that the character of the silting degree in drainage area and the regional vary with rainfall.更多还原