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一、引言一次暴雨期间的泥沙过程线及径流过程线为估算输沙量、设计有效的排沙建筑物、研究附着在泥沙上的污染物的输移等提供了有用的资料.如果采用平均输沙率而不是输沙过程线,就不能恰当地估计一次暴雨期间泥沙及污染物的动态过程。应用系统分析方法可得出泥沙过程线的预报值(Overton,1976:Randkivi,1979).泄入水道的泥沙的空间变化以及详细的输移过程可以集总成为单一系统.可将产沙因子(如降雨和径流)当作系统的输入,而输沙量则为系统的输出。流域的地貌特征和水
I. INTRODUCTION The sediment course and runoff course during a heavy rainfall provide useful information for estimating sediment discharge, designing effective sediment discharge structures, studying the transport of pollutants attached to sediment, etc. If adopted The average sediment transport rate, rather than the sediment transport process, can not properly estimate the dynamics of sediment and pollutants during a heavy rainstorm. Systematic analysis can be used to predict the value of the sediment process (Overton, 1976: Randkivi, 1979). Spatial changes in sediment and detailed transport processes can be aggregated into a single system, Factors (such as rainfall and runoff) are used as input to the system, while sediment discharge is output to the system. Geomorphological features and water in the basin