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(一)产沙特性:长江流域分布的红壤、黄壤、紫色土、黄棕壤、棕壤、褐土等,大部发育于基岩上,母质以下的风化体及半风化体的颗粒成分均较粗,特别在崩岗和泥石流侵蚀区,产沙量大、势猛尤为突出,流域内流经花岗岩或花岗片麻岩地区的赣江、浠水、巴水、蕲水和流经泥石流区的金沙江、西汉水、白龙江等,均为多泥沙河流。疏松深厚的花岗岩风化体,由于缺乏
(I) Characteristics of sediment production: The red soil, yellow soil, purple soil, yellow brown soil, brown soil, cinnamon soil and so on distributed in the Yangtze River Basin mostly develop on bedrock. The grain compositions of the weathered and semi-weathered bodies below the parent material are all Thick, especially in the collapse and debris flow erosion area, sediment yield is large, the potential is particularly prominent, the basin flows through the granite or granite gneiss area Ganjiang, Xishui, Pakistani water, water and flow through the debris flow area The Jinsha River, West Han River, Bailong River, are more sediment rivers. Loose granite weathering body, due to lack of