2.0

Calculating the Runoff from Watershed Areas
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The file name must remain the same. The provided names (Type I, IA, II, III,
and IV) must be used although they reference the new data you have
provided.
The rainfall distribution data files are located in the c:\Program Files\Land
Desktop R2\land\prot\hd folder. These text files have the distribution name
and a .tbl extension (for example, typeii.tbl). These files contain the rainfall
information in a specific format.
To use your local rainfall distribution tables with Autodesk Civil Design, you
can either edit the appropriate .tbl file or replace it with a file that contains
revised data but has the same file name.
NOTE
If you already ran Autodesk Civil Design and selected a distribution type, a
binary format file (for example, typeii.dab) was created in the c:\Land
Projects R2\<project name>\hd folder. You must delete the .dab file before
you can use the new table file. A new file is created only if the .dab file
does not exist.
The following is the first line from the typei.dab file:
I,12,10,32,3
where:
I: Indicates the table type
12: Indicates the number of Tt
10: Indicates the number of Tc
32: Indicates the number of columns
3: Indicates the number of Ia/p
The next two lines in the file contains the Tt and Tc values. For example:
0.0,.1,.2,.3,.4,.5,.75,1.0,1.5,2.0,2.5,3.0
0.0,.1,.2,.3,.4,.5,.75,1.0,1.25,1.5,2.0
The third line in the file lists the hydrograph times. For example:
9.0,9.3,9.6,9.9,10.0,10.1,10.2,10.3,10.4,10.5,10.6,10.7,10.8
The fourth line in the file lists the Ia/p values. For example:
0.10,0.30,0.50