Frequency Curve Determination
via Bulletin 17b "Guidelines for Determining Flood Flow Frequency"
A number of free programs developed by U.S. government agencies are available,
including those from the links below. In addition, a Microsoft Excel spreadsheet
developed by NRCS Water Quality & Quantity is provided.
-
HEC-SSP (US Army Corps of Engineers)
-
PEAKFQ (US Geological Survey, Frequency Analysis Program)
The following Microsoft Excel spreadsheet was developed by the NRCS Water Quality
and Quantity Technology Development Team, has been tested, and correctly reproduces the results of
examples in Bulletin 17B "Guidelines for Determining Flood Flow Frequency", revised edition, March 1982.
The spreadsheet employs macros which are safe in this version at the time downloaded. The user is
cautioned that proper use of the spreadsheet requires training in hydrology and statistics.
downloads
FreqCurves_ver210.xls
(762 kb,
requires Microsoft Excel.)
The following files require Adobe Acrobat.
Bulletin 17B in 3 parts:
Bulletin17B_thru_appx2.pdf (5.4 Mb)
Bulletin17B_appx3-7.pdf (5.8 Mb)
Bulletin17B_appx8-end.pdf (4.9 Mb)
Bulletin 17B as one big file:
Bulletin17B.pdf (16.1 Mb)
contact:
dan moore
Here's a full size view of a sample frequency curve:
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