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Table Of Contents
Chapter 5 Working with Hydrology Commands
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Data File Format for Hydrology Files
All data files must have a specific format in order for Autodesk Civil Design to
recognize them. If you are editing an existing data file, do not alter the format.
The following are examples of several types of data files:
Hydrograph Data File (.hdc) Format
#Units=Time,hrs,Flowrate,cfs
#Hydrograph Data
#Time - hrs Flowrate - cfs
#------------ -------------
0.0,0.0
0.1,37.0
0.2,123.0
0.3,170.0
0.4,120.0
0.5,65.0
0.6,36.0
0.7,20.0
0.8,11.0
0.9,6
1.0,3.8
1.1,1.9
1.2,0.0
Stage-Discharge Curve Data File (.sdc) Format
#Units=Elevation,ft,Flowrate,cfs
#Stage-Discharge Curve Data
#Stage - ft Discharge - cfs
#------------ -------------
0.00000000, 0.00000000
0.90000000, 10.00000000
1.40000000, 20.00000000
1.80000000, 30.00000000
2.20000000, 40.00000000
2.50000000, 50.00000000
2.90000000, 60.00000000
3.20000000, 70.00000000
3.50000000, 80.00000000
3.70000000, 90.00000000
4.00000000, 100.00000000
4.50000000, 120.00000000
4.80000000, 130.00000000
5.00000000, 140.00000000
5.30000000, 150.00000000
5.50000000, 160.00000000
5.70000000, 170.00000000
6.00000000, 180.00000000
6.40000000, 200.00000000
6.80000000, 220.00000000
7.00000000, 230.00000000
7.40000000, 250.00000000
Stage-Storage Curve Data File (.ssc) Format
#Units=Elevation,ft,Volume,ft3
#Stage-Storage Curve Data
#Stage - ft Volume - ft3
#------------ -------------
200.00000000,396818.94668779
198.00000000,293190.61072878
196.00000000,199795.66466650
194.00000000,116181.51308046
192.00000000, 41895.59585057
190.75000000, 0.00000000