The research on evolvement law of drainage basin sediment yielding plays an important role in design of a project, planning and control of soil erosion.
流域产沙量演变规律的研究对于工程设计、水土流失规划与治理具有重要作用。
There are lots of factors which influence the evolvement law of sediment discharge, and it is very difficult to be known and gained, it results in low precision of simulation and forecast.