Software Development for Design Flood of Small and Medium-sized Catchment in Shaanxi basedon DEM
At present,there is still a gap in flood design Software for small and medium-sized catchment in Shaanxi.In order to resolve this issue,a flood design software based on Digital Elevation Model(DEM)was developed.The software enables efficient and standardized design of flooding,avoiding the operation for cumbersome tables and manual calculation.The software uses the isohyetal map of mean rainfall and coefficient of variation(Cv)at different durations in Shaanxi province to create a DEM database.By selecting points,the software automatically interpolates and obtains all parameters related to the center of gravity location of the project's catchment.The software employs derived numerical method to develop the runoff yield and flow concentration process,which includes Instantaneous Unit Hydrograph and Rational Formula.This ensures visualization,efficient calculation,and quick standard output of design flood in small and medium-sized catchment in Shaanxi Province.As a result,the accuracy of calculation and work efficiency are significantly improved.Furthermore,the algorithm and development method of the software can be extended to the design flood calculation in data-scarce areas of small and medium-sized catchments in other provinces and cities.
softwareDEM interpolationdesign floodinstantaneous unit hydrographrational formula