14. ABSTRACT The Hydrologic Modeling System (HEC-HMS) is designed to simulate the complete hydrologic processes of dendritic watershed systems. In includes many traditional hydrologic analysis procedures such as event infiltration, unit hydrographs, and hydrologic routing. It also includes procedures necessary for continuous simulation including evapo-transpiration, snowmelt, and soil moisture accounting. Gridded runoff simulation can also be performed. Supplemental analysis tools are provided for parameter estimation, depth-area analysis, flow forecasting, uncertainty assessment, and erosion and sediment transport. The program features an integrated work environment with data entry utilities, computation engine, and results reporting tools. A graphical user interface allows seamless movement between the different parts of the program. Simulation results are stored in the Data Storage System HEC-DSS and can be used in conjunction with other software for studies of water availability, urban drainage, flow forecasting, future urbanization impact, reservoir spillway design, flood damage reduction, floodplain regulation, and systems operation. |
15. SUBJECT TERMS Hydrology, watershed, precipitation runoff, river routing, flood frequency, flood control, water supply, computer simulation, environmental restoration. |