电站取水河段长时段的泥沙淤积特性研究（注：研究生论坛）

摘 要:为解决将数学模型运用于电站取水口长时段内的河床演变问题，从而引起计算效率与精度不足的缺陷。本文采用基于隐式与显式结合的算法，探索河道长时段的泥沙淤积特性，建立能模拟长时段河床演变的水沙数学模型，并将该模型应用于昭化电站取水河段泥沙冲淤模拟。通过物理模型与数学模型在不同频率洪水下取水口水位和流速的比较结果，表明此数学模型可以较好模拟取水口水流特性；通过预测昭化电站拉沙方案与不拉沙方案下取水河段运行多年后的河床演变，结果表明此数学模型模拟结果与实际工程结果相似，符合客观规律，能较好模拟河段的泥沙问题。

Power Plant Water intake of Sedimentation Characteristics of Long Period of Time Study

Abstract:For the mathematical model was used in power station intake problem of long period of riverbed evoluti- on, resulting in the low calculation efficiency and low accuracy of defects. In this paper adopt the combination of implicit and explicit algorithm ,explored sedimentation Characteristics of long period of time,established the long period of water and sediment mathematical model can simulate riverbed evolution,and applide the model to Zhao Hua power plant,s sediment deposition.The comparison results of water intake,s water level and flow rate with physical model and mathematical model under different frequency flood, showed that the mathematical model could better simulate the flow characteristic of water intake. By predict under lasha scheme and not lasha ,scheme power plant running years of riverbed evolution,the results showed that the mathematical model for simulation results was similar with the actual engineering, complied with objective rules,could better simulate the river sediment problems.