HEC-1 is software that was developed by the US Army Corps of Engineers to estimate river flows as a result of rainfall. It was written in the FORTRAN language and until 1984 could only be run on a mainframe computer. When desktop computers became popular the program was ported to the PC. HEC-1 was developed by the United States Army Corps of Engineers and is the predecessor to HEC-HMS. Overall, HEC-HMS was built to improve the quality of simulation results using advances in computer science and engineering. Unlike HEC-HMS, HEC-1 does not have graphical user interface (GUI). In HEC-HMS, properties are calculated based on. The method is appropriate for watersheds in the United States east of 105° west longitude with an area less than 1,000 square miles. New methods in risk-based analysis have generally replaced the standard project flood criteria.' (HEC-HMS User's Manual) The HMS Meteorological Model dialog for the standard project storm method is shown below. What is a BASIN file? The BASIN file type is primarily associated with Hydrologic Modeling System (HEC-HMS) by U.S. Army Corps of Engineers. The Hydrologic Modeling System (HEC-HMS) is designed to simulate the precipitation-runoff processes of dendritic watershed systems. How do you open a BASIN file?
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 evapo-transpiration, snowmelt, and soil moisture accounting. Advanced capabilities are also provided for gridded runoff simulation using the linear quasi-distributed runoff transform (ModClark). Supplemental analysis tools are provided for model optimization, forecasting streamflow, depth-area reduction, assessing model uncertainty, erosion and sediment transport, and water quality.
The software features a completely integrated work environment including a database, data entry utilities, computation engine, and results reporting tools. A graphical user interface allows the user seamless movement between the 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 studies of water availability, urban drainage, flow forecasting, future urbanization impact, reservoir spillway design, flood damage reduction, floodplain regulation, and systems operation.
* HEC-HMS download link provides gnu general public license version of the software.
Statistical Software Package (HEC-SSP) developed by the Hydrologic Engineering Center. This software allows you to perform statistical analyses of hydrologic data.
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HEC-RAS is designed to perform one-dimensional hydraulic calculations for a full network of natural and constructed channels.
The Reservoir System Simulation (HEC-ResSim) software is used to model reservoir operations at one or more reservoirs for a variety of operational goals and constraints.
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HEC-ResPRM is a reservoir system operations optimization software package developed to assist planners, operators, and managers with reservoir operation planning and decision-making.
The HEC-FIA Flood Impact Analysis software package analyzes the consequences from a flood event.
The Regime Prescription Tool (HEC-RPT) is designed to facilitate entry, viewing, and documentation of flow recommendations in real-time, public settings.
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