长江口细颗粒泥沙过程

本文对长江口细颗粒泥沙过程研究进行了总结,并提出了今后重点研究方向1）长江口细颗粒泥沙是非均匀沙，其运动机理究竟如何？2）大规模水利工程究竟如何影响长江口最大浑浊带?3）在长江口细颗粒泥沙过程的数学模拟中,如何考虑河口波、流相互作用(耦合)及其对近底细颗粒泥沙输移的影响?4）整个长江口水域瞬时、连续的水深、含沙量、地形变化资料的获*粒泥沙过程数学模拟的精度。5）长江口悬沙以拉格朗日模式输运,而过去大多悬沙观测调查是在欧拉模式中进行，如何进行欧拉和拉格朗日模式对比研究?6）风暴潮、台风等对长江口细颗粒泥沙运动的影响。

Fine Sediment Processes in the Changjiang(Yangtze)River Estuary

This paper presents an overview of significant progress in the studies of turbidity maximum and fine sediment processes in the Changjiang(Yangtze)River Estuary. Emphasis should be placed on the following six aspects: 1）Fine sediments are non-uniform, what are their transport mechanisms? 2) How do the large-scale hydraulic engineering projects affect the turbidity maximum in the Changjiang Estuary? 3) In the numerical modeling of turbidity maximum, the wave-current interactions and their effects on the near-bed fine sediment transport should be taken into account. 4) To improve the resolution of numerical modeling of hydrodynamics and sediment transport in the Changjiang Estuary, it is needed to develop new technology and methods for field measurements of the instantaneous and continuous water depth, suspended sediment and topographic data in the whole Changjiang Estuary water area. 5) Most investigations were carried out in an Eulerian framework, while the suspended sediments are being advected along in a Lagrangian frame in the Changjiang Estuary. How to do the comparison? 6) The effects of extreme weather conditions, e.g. storm surges and typhoon, on the fine sediment transport in the Changjiang Estuary.