Research and Application of Design Flood Calculation Methods for Small Watersheds

It systematically analyzes four commonly used calculation methods of small watershed design flood, such as reasoning formula method, instantaneous unit line method, hydrologic analogy method and regional experience formula method.In the Beijiang river basin of Guangdong province, four methods were used to calculate the design flood of each small basin, the rationality of the results was analyzed, and the differences and applicable conditions of the four methods were compared.