采用二阶精度和谐的加权平均通量(WAF)格式对浅水波方程中的间断解和干湿边界问题进行了研究.用基于HLL求解器的WAF格式近似数值通量,中心差分格式离散地形源项,在干湿边界处重新定义数值河床,保证格式是和谐和扩展和谐的.最后模拟了带激波和干湿边界的浅水问题,精确地捕捉到了激波和干湿边界面,验证了该格式具有高分辨率、无振荡以及正确模拟干湿边界的能力. The second-order accuracy and harmonic weighted average flux (WAF) format is used to study the discontinuous solution and the wet-dry boundary problem in the shallow water equations.An approximate numerical flux, WAF format based on HLL solver is used to discretize the terrain source Item, the numerical riverbed is redefined at the wet-dry boundary to ensure the harmony and expansion of the riverbed.Finally, the shallow water problem with shock and wet-dry boundary is simulated and the shock and wet-dry boundary surfaces are accurately captured. The format has high resolution, no oscillation and the ability to correctly model wet and dry boundaries.