This manual provides guidance and procedures for frequency analysis of: flood flows, low flows, precipitation. water surface elevation, and flood damage.

Frequency estimates of hydrologic, climatic and economic data are required for the planning, design and evaluation of flood control and navigation projects. The text illustrates many of the statistical techniques appropriate for hydrologic problems by example. The basic theory is usually
not provided, but references are provided for those who wish to research the techniques in more detail.

The techniques described herein are taken principally from “Guidelines for Determining Flood Flow Frequency” (46 – Water Resources Council, “Guidelines for Determining Flood Flow Frequency,” Bulletin 17B, Hydrology Committee, Washington, D.C., March 1982), “Statistical Methods in Hydrology” (1 – Beard, L. R., “Statistical Methods in Hydrology,” U.S. Army Corps of Engineers, Sacramento, CA, January 1962), and “Hydrologic Frequency Analysis” (41 – U.S Army Corps of Engineers, “Hydrologic Frequency Analysis,” Volume 3 of Hydrologic Methods for Water Resources Development, the Hydrologic Engineering Center, Davis, CA, April 1975).

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