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Table Of Contents
Chapter 5 Working with Hydrology Commands
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section. A record is required for each cross section; this record is used to specify
the cross section geometry and program options applicable to that cross section.
NOTE
You must save the HEC-2 input file with a .dat extension if you want to
import the section into a drawing.
HEC-2 Data Structure
When using the HEC-2 Output commands, the data is written in the following
data structure:
GR Record  Cross Section Ground Line Information
Field Variable Value Description
0 IA GR Record identification
characters
1 EL(1) + or - Elevation of cross section point at station STA(1); can
be positive or negative
2 STA(1) ++ Station of cross section point one
3 EL(2) + or - Elevation of cross section point two at STA(2)
4 STA(2) ++ Station of cross section point two
You can continue adding GR records to describe the cross section. Stations must
be in increasing order, progressing from left to right across the cross section. For
more information, refer to the HEC-2 Water Surface Profiles Users Manual, 1990,
U.S. Army Corps of Engineers, published by the National Technical Information
Service of the U.S. Department of Commerce.
X1 Record - General Items for Each Cross Section
The following record is required for each cross section. Use this record to specify
the cross section geometry and program options applicable to that cross section: