HEC-Pack

单击可放大图像

HEC-HMS allows users to schematically build the hydrologic network, including sub-basins and routing reaches.

Use HEC-HMS to perform calculations similar to those of HEC-1, covering a variety of precipitation and runoff processes.

Precipitation Modeling

• Model hypothetical storm events based on frequency.
• Use the U.S. Army Corps of Engineers standard project storm for hypothetical storms in the U.S. east of the Rocky Mountains.
• Consider historical storm events through cell-based precipitation data.
• Import precipitation data from other sources.
• Specify gages and a method of weighting the gages, including user-defined and inverse distance-squared weighting.

Basin Modeling

• Compute sub-basin runoff in either a lumped or linearly distributed fashion.
• Determine losses based on several methods, including Green & Ampt, SCS Curve Number, gridded SCS Curve Number, and the Initial/Constant method.
• Transform precipitation to runoff through either unit hydrograph methods (Clark, Snyder, or SCS) or Kinematic Wave methods.
• Route hydrographs using Kinematic Wave, Modified Puls, Muskingum, or Muskingum-Cunge.
• Divert flow, either losing the diverted hydrograph or adding it back in further downstream.

其他功能 :

1. HEC-GIS (aka HEC-GeoRAS)
2. Flood Hydrology Calculations with Graphical HEC-1
3. Hydrologic Modeling with HEC-HMS
4. River Analysis with HEC-RAS

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