The SCS Rainfall Library command allows you to
store commonly used storm types for SCS method. The SCS has
developed several standard distributions that cover the entire US,
commonly known as the Type I, IA, II, and III storms. For
situations where a standard rainfall distribution is not available
or appropriate, you can create a localized rainfall distribution
table in the SCS Rainfall Library. The default library file is in
the Carlson Install Directory\USER folder and is available for all
projects in sewer network design.
From the Network
> Sewer Network Libraries menu in the Hydrology Module, select
SCS Rainfall Library to open the library dialog. New button creates a new storm type
entry, Edit button allows
you to modify the highlighted entry, and Delete button removes the highlighted
entry from the library. Load and SaveAs buttons allow you to load and
save the library data. The Import CSV or (comma-separated values)
allows the user to import rainfall depth data in csv or txt file
formats. In the CSV file, only the fractional rainfall depth at
every time increment is required. The fractional rainfall depth
data should be between 0 and 1, and delimited by comma. The time
increment value is entered on the dialog.
We have collected most of the rainfall distributions that are published on the NOAA website. The rainfall distribution data are all in 24-hour duration, and 90% frequency, the frantional rainfall depth value is between 0 and 1. You can load the SCS rainfall library file (.srn) of the desired region to the library to use it. Available regions are as follows:
Data Flies:
Region 1 - NOAA
California Region 1.srn
Region 2 -
NOAA California Region 2.srn
Region 3 -
NOAA California Region 3.srn
Region 4 -
NOAA California Region 4.srn
Region 5 -
NOAA California Region 5.srn
Region 6 -
NOAA California Region 6.srn
Region 7 -
NOAA California Region 7.srn
Region 8 -
NOAA California Region 8.srn
Region 9 -
NOAA California Region 9.srn
Region 10 -
NOAA California Region 10.srn
Region 11 -
NOAA California Region 11.srn
Region 12 -
NOAA California Region 12.srn
Region 13 -
NOAA California Region 13.srn
Region 14 -
NOAA California Region 14.srn
Data Files:
Region - NOAA Hawaiian
Islands.srn
Data Files:
Semiarid SW Convective Area Region: NM,
AZ
- NOAA
Semiarid SW Convective Area.srn
Semiarid SW General Precipitation Region:
UT,NV -
Semiarid SW General Precipitation.srm
Data Files:
Region 1: SD, ND, MN, WI, MI
- NOAA Midwestern Region 1.srn
Region 2: Southwest corner of CO
- NOAA Midwestern Region 2.srn
Region 3: OK, NE, KS, IA, CO
- NOAA Midwestern Region 3.srn
Region 4: Missouri - NOAA Midwestern Region
4.srn
Data Files:
Region 1: AR, LA, MS, AL, GA
- NOAA Southeast Region 1.srn
Region 2: FL -
NOAA Southeast Region 2.srn
Data Files:
Region - NOAA Ohio River
Basin.srn
Data Files:
Region 1: Upper Part of Alaska
- NOAA Alaska Region 1.srn
Region 2: Juneau, Aleutian Islands
- NOAA Alaska Region 2.srn
Data Files:
Region - NOAA Puerto Rico and the U.S.
Virgin Islands.srn
Data Files:
Region - NOAA Selected Pacific
Islands.srn
SCS Rainfall Library dialog: Fill in values.
Pulldown Menu Location: Network > Sewer Network
Libraries > SCS Rainfall Library
Keyboard Command: scsrainlib
Prerequisite: None