黄茅海河口湾泥沙输移研究——兼论McLaren模型在河口中应用的问题

Bottom Sediment Transport in Huangmaohai Estuary,South China:The Problems of the Application of McLaren Model in Estuarine Environments

以珠江黄茅海河口为例，使用１９８８年４月、１９９２年洪、枯季表层沉积物颗粒分析成果，根据泥沙粒径统计特征值，运用ＭｃＬａｒｅｎ模型分析河口泥沙输移趋势，并结合水动力及水下地形进行综合分析，确定泥沙来源、搬运方向，探讨泥沙输移机制。为进一步研究河口泥沙运动规律及泥沙通量提供背景，同时为研究河口湾出海航道、港口泥沙淤积及河口污染物输移扩散提供一条新途径。

Considering the distribution of subaqueous morphologic units and bed forms,the present paper applies McLaren model to calculate the sediment transport trends in Huangmaohai Estuary in southern China.Compared trasport trends with the hydrodynamic and sedimentary processes,good agreement is seen between the sediment transport trends and the directions of sediment transport,Based on comprehenslve analyses of hgdrodynamics and underwater topography. sediment sources and sinks are identified,sediment transport pathways are discovered,and the sediment transport mechanism is preliminarily studied.Applicability of McLaren model to coastal environments with multiple sediment sources is herewith discussed also.All these will assist in an in depth study of estuarine sediment movement and sediment fluxes.It also provides an effective and simple method to study sediment sources and transport in navigational channels and harbours, and pollutant transport in estuarine environment.