DAMP (Highway Sub-Drainage Design By Microcomputer)
VERSION/DATE: Version 1.1, August 1990
OPERATING SYSTEM: DOS
DOCUMENTATION (121 Pages):
Highway Sub-Drainage Design By Microcomputer: (DAMP) Version 1.1, August 1990 By US Department of Transportation, Federal Highway Administration
"Drainage Analysis and Modeling Programs," - DAMP contains the modules felt to be required to perform a drainage analysis of a new pavement, and of a rehabilitation project. These modules are:
Determination of net inflow of water into the pavement system Surface infiltration Meltwater Evaluation of pavement geometries which alter inflow/outflow Cut with groundwater interceptor drains lowering water table Artesian pressures Fill section
Determination of AASHTO drainage, coefficients Drainage time in saturated base Exposure time of saturation
Edge drain analysis Drain diameter Outlet spacing Geocomposite fin drains Trench widths
Drainage layer analysis Permeability Thickness
Filtration analysis Gradation evaluation Fabric selection
The program is designed to operate in an interactive mode. The user is taken through a series of menu screens to input data, with the resulting calculations being shown as they are developed. Calculations are presented directly after entering the data for that calculation to provide the user the option of recalculating at that time if desired. Since many of the calculations require the data, all data is echoed to the screen, and the user can alter it or use the same data, depending on the situation. This allows the user to perform mini sensitivity analyses in an interactive mode. Once a data element is changed in one routine the changed value is active for all routines in the program, and the user can see the change when he moves through the program back to the different modules.
There is the option to execute the program in batch mode after a data file has been prepared. The data file can be prepared by going through the program and completing all applicable statements, and then selecting the batch mode from the main menu. The calculations are, stored on disk and can be printed with the printer routine.
There are graphic help screens and textual help screens in the program designed to assist the user in developing input data and interpreting the output of the program.