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Table Of Contents
Chapter 2 Working with Ponds
138
Creating an .ssc File to Use in Calculations
For calculating pond routing with the Storage Indication Method, a stage-
storage curve file (.ssc) is required. From the Hydrology menu, you can create a
stage-storage curve by using the Pond Output ä Stage-Storage Curve command.
Or, you can use the following method to manually create the stage-storage
curve file.
To create a stage-storage curve file for use in routing calculations
1 Open a text editor and create an ASCII text file using the following format:
n
Format the first line by starting the
line with #Units=. This is an optional
comment line.
n
Delimit the file data with commas
(e.g. 0.1,1.05).
n
Precede comment lines with a pound
(#) sign (e.g.
#Units=Time,hrs,Flowrate, cms).
#Units=Elevation,m,Volume,m3
#Stage-Storage Curve Data
#Stage - m Volume - m3
#----------------------
0.00000000,0.00000000
0.25000000,320.85151904
0.40000000,518.29860768
0.55000000,691.06481024
1.95000000,3183.83430432
2.05000000,3492.34538032
2.15000000,3640.43069680
2.25000000,3961.28221584
2 Save the file with a .ssc extension in the folder, c:\Land Projects R2\<project
name>\hd folder.
Creating an .hdc File to Use in Calculations
For calculating pond routing with the Storage Indication Method, a post-
development hydrograph file (.hdc) is required. You can create a post-
development hydrograph file by using the TR-55 Graphical and Tabular
methods, the Rational method, or the Combine Hydrographs command. Or,
you can use the following method to manually create the .hdc file.
To create a hydrograph data file for use in routing calculations
1 Open a text editor and create an ASCII text file using the following format:
n
Format the first line by starting the
line with #Units=.
n
Delimit the file data with commas
(e.g. 0.1,1.05).
n
Precede comment lines with a pound
(#) sign (e.g.
#Units=Time,hrs,Flowrate, cms).
#Units=Time,hrs,Flowrate,cms
#Hydrograph Data
#Time - hrs Flowrate - cms
#------------ -------------
0.0,0.0
0.1,1.05
0.2,3.48
0.3,4.81
.
.
.
0.9,0.17
1.0,0.11
1.1,0.05
1.2,0.0