Design flood determination for small basin without record in Zhaotong City,Yunnan Province
Sun Kun1, Du Jun2, He Jiajie1
1. Huazhong Agricultural University, Wuhan 430070; 2. Department of Soil and Water Conservation in Yangtze River Scientific Research Institute, Wuhan 430010
Abstract:Base on flash flood survey results,taking a small basin in Zhaotong City as an example, two methods are adopted for calculating design flood, which are:hydro-geography and instantaneous unit hydrograph. The discriminations and the characteristic of two methods are studied in detail using comparative analysis. The results indicates that the hydro-geography method is simple,easy to use and less dependent on data; Therefore, is widely used locally as an empirical formula. However, due to the subjectivity selecting parameters,results are generally smaller for situation where the data is lacking. The instantaneous unit hydrograph has a clear physical definition; it depicts flood processes more meticulous. Therefore, the results have higher consistency with other literatures in the past. In conclusions, the method of instantaneous unit hydrograph is optimal.
孙昆, 杜俊, 贺佳杰. 云南昭通市无资料地区小流域设计洪水计算[J]. 中国防汛抗旱, 2017, 27(6): 119-124.
Sun Kun, Du Jun, He Jiajie. Design flood determination for small basin without record in Zhaotong City,Yunnan Province. journal1, 2017, 27(6): 119-124.