In the confluent area, flow pattern is tangled, the changes of sediment erosion and deposition are big, and the condition of navigation is complex.
河流交汇口区域水流紊乱，泥沙冲淤变化大，通航条件极其复杂。
The whole process of water and sediment in watershed consist of water generation and concentration, sediment erosion, transportation and deposition.
全流域的水沙过程包括降雨产流、汇流的全过程，以及泥沙侵蚀、输移、沉积的不同运动形态。
Dynamic soil erosion processes involve the spatial and time dependent processes of detachment, rill formation, deposition, re rilling from deposited sediment and scouring of rills.
动态土壤侵蚀包括依赖于空间与时间的土壤剥离、细沟的形成、水流中过量泥沙的沉积、沉积泥沙中细沟的再生等物理过程。
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