RMAGEN Features

The program is designed to run in conjunction with a mouse and a graphics display screen. Its purpose is the creation of an RMA2, RMA10, or RMA11 input file that is directly suitable for input to RMA1, to edit a previous RMA2, RMA10, or RMA11 input file and/or to generate an output binary file that can replace the geometry file generated by an RMA2, RMA10, or RMA11 run.


RMAGEN has the ability to use additional data input for sloping beds in one-dimensional elements. RMAGEN also permits the user to display data values as colored points as an alternative to numbers.

RMAGEN also has the ability to lock/unlock nodal elevation values. The lock/unlock options can be accessed from the node/elev menu or after ìselecting/nodesî from the dropdown menu. This feature allows the user to manually set nodal elevations and then allow the interpolation routine to pick up values for other nodes. This option is accessed node/elev box menu. RMAGEN allows the user to load a replacement map file during processing and save the lock/unlock information on the rm1 and geo files.

RMAGEN has the capability of displaying background files. These files may be in a variety of formats, either bitmap format (bmp, pcx or png) or vector format (wmf, cgm, or pic). RMAGEN adds the capability to register corners of a loaded image using known locations of points within the image. This option is accessed from the Rdraw/Background/Register drop down menu. RMAGEN also has many other capabilities.

Powerful Graphics

Besides graphing the primary basin and any sub-basin boundaries, BOSS HMR52 will graph the storm isohyetal pattern, rainfall hyetograph, and the accumulated rainfall for the primary basin and each sub-basin. These graphs can then be exported to nearly any CAD system, such as AutoCAD, using the program's DXF and IGES export facility. This enables you to plot, annotate, or modify the graphs as desired. Or you can plot the graphs directly on most plotters using the program's HPGL and DMPL plotter support facility. In addition, you can export the graphs to many word processors using the program's EPS and TIFF export facility. This permits you to insert the graphs directly into a project report and then print the report along with the inserted graphs on a dot-matrix or laser printer.

BOSS HMR52 will generate a rainfall hyetograph, showing the temporal rainfall distribution of the probable maximum storm.

Built-in Error Checker

As you enter data, and just prior to the data analysis, BOSS HMR52 automatically checks your data for errors via BOSS ADVISOR™, an integrated expert system. If the ADVISOR encounters an error in your input data, it will explain what is wrong and how you can correct it. BOSS ADVISOR can be thought of as an expert HMR52 user looking over your shoulder, pointing out any mistakes made as you build your model.

The BOSS HMR52 Model

BOSS HMR52, based on HEC's HMR52 program, helps engineers compute basin-averaged precipitation for Probable Maximum Storms (PMS), and corresponding spatially-averaged Probable Maximum Precipitation (PMP) for a basin or combination of watershed sub-basins. The program employs the procedures specified in the NWS's Hydro-meteorological Report No. 52, which pertains to the Central and Eastern United States.

BOSS HMR52 will compute the total rainfall for the probable maximum storm.

The program maximizes the precipitation from a storm by breaking the storm area into a set of concentric, elliptically-shaped isohyets, each representing different percentages of the storm's total rainfall. The program will automatically size, position, and orient the storm so that it will produce the maximum precipitation on the user-defined drainage basin. Since the PMP may not produce the Probable Maximum Flood (PMF), the storm-area size, position, and orientation can be adjusted by the user to maximize the PMF. The PMP data computed by BOSS HMR52 can be directly exported to HEC-1 to compute and plot the PMF hydrographs.

BOSS HMR52 will maximize the precipitation from a storm for a particular watershed basin.