海口分层流中的泥沙输运计算

A Mathematical Model for Transportation Process Calculation of Estuary Sediment

本文展示了一个计算泥沙输运过程的三维数值模型，此模型的特点在于较准确地计入凝絮及河床侵蚀对于泥沙沉淀过程的影响．关于凝絮及侵蚀的定量计算模型已为大量实验所验证，且是首次被结合运用于三维输运计算．文中对于海湾区域的泥沙输运进行了数值研究，第一次通过定量计算证实了所谓最大浑浊区的存在，并研究了影响其形成及强度的几个因素．这些计算结果不仅证实了数值模型的有效性，而且显示了其在泥沙输运研究方面的作用与潜力．

This paper presents a 3-D numerical model for the calculation of sediment transportation. The main feature of this model is that it accurately accounts for the effect of flocculation and resuspension on the sediment transport process.The empirical models of flocculation and resuspension have been proved by many experiments.This paper is the first to apply one of the models,i. e. the 3-D numerical model,to the calculation of 3-D transport.The numerical experiments on the sediment transport process in estuaries show the existance of the 'turbidity maximum'area through 3-D quantitative calculations for the first time.A study of the factors which afffect the formation and intensity of the 'turbidity maximum'has also been carried out. All these results not only prove the validity of the model,but also show its potential and effectiveness in the area of the study of sediment transport.