针对给排水干湿分离难以确定运动交界的问题,该研究将利用离散格式有限元建立浅水方程模式,结合细分化单元内物理量进行线性重构,提出了一种新的给排水干湿分离方法。该方法保证了干湿交界处水体静止状态不被破坏,并且在水体非物理流动条件下的干湿处的过渡区域之间可连续。经过数值实验结果表明,采用间断式的有限元模式能够准确地模拟给排水的水体情形,计算过程中可精确计算间断间运动过程。 In order to solve the problem that it is difficult to determine the boundary of motion in wet-dry separation of water supply and drainage, a shallow water equation model based on discrete finite element method is established and linearly reconstructed by the physical quantities in the subdivision unit. A new method of wet-dry separation . The method ensures that the water body at the dry-wet junction is not damaged at rest and is continuous between the transitional regions at the wet and dry conditions under the non-physical flow of water. The results of numerical experiments show that discontinuous finite element method can accurately simulate the water supply and drainage conditions, and can accurately calculate the movement process during the interval.