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来源：百度知道 编辑：UC知道 时间：2024/07/05 16:59:12
本文以X江中下游防洪系统为对象，根据X江中下游水系复杂，涉及范围广，地域差异显著，空间尺度变化大，区域组成复杂多样，且耦合作用强，相互影响，相互制约等实际情况，在总结前人研究X江中下游水沙数学模型的基础上，从探索X江中下游水沙输运规律包括河道水沙和湖泊水沙运动规律入手，在数值模拟框架内对区域内各种水力单元或环节的计算模式，包括分流口、汇流口水沙计算模式，河网动边界及其计算模式，湖泊泥沙输沙率计算模式，动床阻力计算模式和河道横断面变形计算模式等进行了深入研究，提出了构建了X江中下游水沙输运数学模型的总体设想及其相关环节的计算模式。
动床阻力：resistance of movable bed
横断面：cross-section
输沙率：sediment transport rate
动边界：movable boundary
河网：river network
汇流口：junction
分流口：distributary estuary
水力：waterpower
数值模拟： numerical simulation
水沙：stream and bedload
耦合：coupling
水系：water system
防洪：prevent flood

In this article we study flood control system of middle and lower X river. Regarding to the complex water system, extensive range, remarkable regional difference, great changeable spatial scale, complicated and verious regional composition, and also stong coupling effect, mutul influnce and restriction, etc, we proposed the overall assumption ahout building mathmatical model of flow and sandiment transport and calculate model for its related links. This achievement is on the base of previous mathmatical model of flow and sandiment transport and starting from exploration of law of flow and sandiment transport, and is the fruit of deeply research on calculate model of various intra-regional hydraulic units in the framework of numerical simulation including calculate model of stream and bedload in distributary estuary and junction, movable boundary of network, sediment tranport rate of lake, resistance of movable and morph of riverway’s cross-section.

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In this paper, X Jia