摘要
以长江中下游防洪系统为对象,概述了在大型复杂防洪系统洪水行为数值模拟基础上,成功地将长江中下游洪水演进数学模型转化为面向长江防洪系统防洪规划方案评估需求的长江中下游江湖水沙演变的数学模型。为适应防洪规划方案论证涉及江湖水沙相互制衡相互关联客观情况,建立了面向江湖水沙关系及其演变的数学模型。针对长江中下游江湖水沙运动特点,在水沙数值模拟的范围内侧重对下荆江河道冲刷、荆江三口分流分沙模式、洞庭湖泥沙淤积、江湖耦合等环节进行了讨论,提出了合理可行的数值处理方法。模拟结果较好反映了江湖水沙演变规律,主要成果已应用于长江中下游防洪规划和防汛调度方案中。
Using the flood control system in the middle and lower reaches of the Yangtze River as study objects, a numerical model for the simulation of flow-sediment transport rates in the rivers and lakes of the reaches is presented. The model is a further development of the numerical flood module that is part of a complex flood control system and able to provide information for flood control planning. The model is used to studying the control of flow-sediment transport rates in the rivers and lakes of the reaches under different planning requirements. The numerical study on the interaction between rivers and lakes is carried. As a result, the evolution trend in the river-lake relationship can thus be established. Aiming at the regime of flow-sediment transport in the rivers and lakes of the reaches, the focus is on the numerical simulation of river scouring in the Jing Jiang river reach, flow-sediment transport rates in Jing Jiang three-estuary, and sedimentation in the Dongting Lake, as well as the coupling of rivers and lakes. On that basis, the numerical model is improved to ensure that the numerical treatment of the model is more feasible. The result shows that the modified model is able to effectively simulate the evolution of flow-sediment transport rates in the rivers and lakes of the reaches. Our results have been used in the planning of flood control projects and flood management practices in the middle reaches of the Yangtze River.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2010年第6期832-839,共8页
Advances in Water Science
基金
"十一五"国家科技支撑计划资助项目(2006BAB05B04)
公益性行业科研专项经费资助项目(200801008
2007Shz02(1-9))~~
