HEC-HMS hydrological simulation

The Hydrologic Modeling System (HEC-HMS) is designed to simulate the complete hydrologic processes of dendritic watershed systems. The software includes many traditional hydrologic analysis procedures such as event infiltration, unit hydrographs, and hydrologic routing. HEC-HMS also includes procedures necessary for continuous simulation, including accounting for evapotranspiration, snowmelt, and soil moisture. Advanced capabilities are also provided for gridded runoff simulation using the linear quasi-distributed runoff transformation (ModClark). In addition, complementary analysis tools are provided for model optimization, streamflow forecasting, depth area reduction, model uncertainty assessment, erosion and sediment transport, and water quality. The software features a fully integrated work environment that includes a database, data entry utilities, computational engine, and results reporting tools. A graphical user interface allows the user to move seamlessly between different parts of the software. Simulation results are stored in HEC-DSS (Data Storage System) and can be used in conjunction with other software for water availability studies, urban drainage, flow forecasting, future urbanization impact, reservoir spillway design, flood damage reduction, floodplain regulation, and system operation.