Vertical curve information includes the stations and elevations of the PI's, and the curve length or rate of curvature (K). It is often more practical and efficient to use the curve fitting option for the program. Under this option, the actual pavement or bridge deck grade elevations and stations are selected for use.
Drainage area information includes the average width and length of each pavement sub-area, and the average width and length of adjacent back slope or other sub-areas draining to the gutter. The runoff coefficients and the boundary station between each sub- area must also be included. If the time of concentration of overland flow is to be calculated by the program, the average slope of each sub-area must also be included.
Cross-slope information includes the pavement cross slope; gutter depression width and its associated cross-slope; and the Manning's roughness coefficient of the pavement/gutter. If the cross-slope varies from the normal or typical section, the station and the cross-slope of appropriate points within such transition sections must be included.
Rainfall information includes the desired rainfall intensity or the coefficients necessary to determine frequency-intensity- duration relationships.
The inlet information includes the type, sizes and/or the locations. A list of common inlet types is provided within the input form. The user must specify the type of grate or scupper along with its length and width.
The design criteria includes the design spread and/or design inlet interception capacity. If interception capacity is not a criteria, input a low value like 0.1. More details about the input data is presented in INPUT FORMAT section of this guide.