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Hydrology:

HEC-HMS

HEC-1 (DOS)

Hydraulics:

HEC-RAS

HEC-2 (DOS)

Utility:

HEC-DSSVue

HydroPro

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Hydrology

ProHEC-CD provides both the Windows and DOS versions on the U.S. Army Corps of Engineer's Hydrologic Engineering Center (HEC) hydrology modeling programs. Some agencies may still require HEC-1 models to be used for a study or if you are importing a HEC-1 model into HEC-HMS we recommend that you run the model using HydroPro first to see if there are any error messages. The following descriptions of both programs are provided.

HEC-HMS, Hydrologic Modeling System (Windows)

HEC-HMS is the Windows-based computer program that replaces HEC-1. HEC-HMS designed to simulate the precipitation-runoff processes of dendritic watershed systems. It is designed to be applicable in a wide range of geographic areas for solving the widest possible range of problems. This includes large river basin water supply and flood hydrology, and small urban or natural watershed runoff. Hydrographs produced by the program are used directly or 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.

The program is a generalized modeling system capable of representing many different watersheds. A model of the watershed is constructed by separating the hydrologic cycle into manageable pieces and constructing boundaries around the watershed of interest. Any mass or energy flux in the cycle can then be represented with a mathematical model. In most cases, several model choices are available for representing each flux. Each mathematical model included in the program is suitable in different environments and under different conditions. Making the correct choice requires knowledge of the watershed, the goals of the hydrologic study, and engineering judgment.

The program features a completely integrated work environment including a database, data entry utilities, computation engine, and results reporting tools. A graphical user interface allows the seamless movement between the different parts of the program. Program functionality and appearance are the same across all supported platforms.

HEC-1, Flood Hydrograph Package (DOS)

All ordinary flood hydrograph computations associated with a single recorded or hypothetical storm can be accomplished with this package. Capabilities include rainfall-snowfall-snowmelt determinations; computations of basin-average precipitation from gages or hypothetical storms; unit hydrographs via direct ordinates or Clark, Snyder or SCS methods, or by kinematic wave transforms; hydrograph routing by level-pool reservoir, average-lag, modified Puls, Muskingum, Muskingum-Cunge, and kinematic wave methods; and complete stream system hydrograph combining and routing. Best-fit unit hydrograph, loss-rate, snowmelt, base freezing temperatures and routing coefficients can flow over and through breached dams. Expected annual flood damage can also be computed for any location in a river basin. Interfaces with HEC-DSS routines for storing, retrieving, graphing, and tabulating data.

5th Edition

June 2008

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