将非恒定水沙过程概化为梯级恒定的水沙过程是进行长系列的河床冲淤变形计算时,为减小计算工作量常用的处理方法.水沙过程概化是保证数模计算精度的一个关键环节,但是目前的概化方法多以人工概化为主,带有较大的主观性.基于演化算法(也称遗传算法)的思想,提出了新的概化方法,并基于RSS河流数值模拟系统中的平面二维水沙数学模型探讨该方法在河流数值模拟中的应用. The generalization of non-constant water and sediment process as a constant water and sediment process is a commonly used treatment method to reduce the computational workload in the calculation of a long series of riverbed scouring and silting deformation.The generalization of water and sediment process is to ensure the numerical accuracy A key link, but the current generalization methods mostly artificial generalization, with a greater subjectivity.Based on the evolutionary algorithm (also known as genetic algorithm), the idea of ​​a new generalization method, and based on the RSS river The Application of 2D Numerical Simulation of Flow and Sediment in Numerical Simulation System to River Numerical Simulation.