河流输沙量的变化受流域降水和下垫面影响很大。
The variation of river sediment load is considerably affected by rainfall and underlying surface.
当支沟泥石流输入主河的泥沙量小于主河的输沙量时，主河河床将下切，并逐渐恢复山区性河流的特征。
The main channel bed will scour if sediment amount from tributary debris is less than that the main stream can carry and the river evolution exhibits the characteristic of mountainous rivers.
结果表明：泾河流域近50年来的输沙量略有下降，而径流量减少比较显著；
Results show that sediment yield decrease slightly but runoff yield increase obviously of Jinghe watershed nearly 50 years;
据统计，在沉降带海岸入海的河流，其输沙量占我国人海河流输沙总量的90%以上，而在隆起带沿岸入海者，其输入量不足10%。
By account of52 major rivers flowing into seas of China, more than 90% suspended load dis-charges into the coastal zones in subsidence areas, and less than 10% in upliftareas.
据统计，在沉降带海岸入海的河流，其输沙量占我国人海河流输沙总量的90%以上，而在隆起带沿岸入海者，其输入量不足10%。
By account of52 major rivers flowing into seas of China, more than 90% suspended load dis-charges into the coastal zones in subsidence areas, and less than 10% in upliftareas.
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