FLOOD09845

• County: Statewide
• Community: State of Colorado
• Basin: Statewide
• Title: Floodplain Management Workshop
• Date: 2/10/1993
• Prepared For: Greeley
• Prepared By: CWCB
• Floodplain - Doc Type: Educational/Technical/Reference Information

cil has adopted the Log-Pearson Type III distribution
for use in statistically analyzing !;treamflow data at a
single location. A good rE!ference covering the details
of the computation procedure when applying the Log
Pearson Type III Distribution to the analysis of
streamflow data is available from the U.S. Water Re-
sources Council (See Reference No. :!).

References

1) Water Resources Publications, Frequency
and Risk Analysis in Hydrology, G.W. Kite,
1977 .

2)U.S. Water Resources Council, Guidelines
for Determini.ng Flood Flow Frequency (Bulle-
tin 17), 2120 L street N.W., Washington D.C.
20037, June, 1977.

MultiplE! Location statistioal AnalY!lis

Multiple Location Statistical Analysis involves the
statistical Analysis of Recorded Hydrologic Data for
use in ::1aking statistical Infenmce at other Locations.
This procedure has been used in the development of
isohyetal maps for rainfall atlases. The National
Oceanic and Atmospheric Administration (NOAA) has
completed a comprehensive analysis of all Weather
Bureau ,Stations throughout the united States that allow
for relatively accuratE!: prediction of rainfall amounts
for various return periods and durations. The rainfall
amount for a given return. period and duration is ob-
tai.ned i:JY interpolation between isohyetals or "rainfall
contours." The most widely used Rainfall Atlas for
many years was Technical :?aper 40 by the U. S. Weather
Bureau. More recently, Technical Paper 40 has been
supplan':ed by the NOAA Western l\tlas (See Ref,erence No.
3) .

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