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中文摘要：
荆江-洞庭湖河网泥沙模型是准确描述江湖水沙输移规律的核心技术与基础。本文在河网水流三级解法基础上，借用河网水流分级解法的思想，结合汉点处沙量守恒方程与分沙模式，研究建立了荆江-洞庭湖河网非恒定泥沙模型；采用实测资料对模型进行了率定与验证，结果表明，模型能很好的反映荆江洞庭湖水沙输移规律，可用于三峡建库后坝下游水沙输移趋势预测研究。
英文摘要：
Based on the three-class method for river networks, a 1-D unsteady numerical model for flow movement and sediment transport in the river network between Jingjiang River and Dongting Lake is established. The model is then calibrated and verified by the measured data of flow and sediment. The simulation results show that the model can reasonably calculate the flow discharge and sediment concentration of the river network. The proposed model could be used to simulate the flow and sediment transport in the downstream channel of the Three Gorges Project.
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