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Suggested criteria for hydrologic design of storm-drainage facilities in the San Francisco Bay Region, California

Open-File Report 71-341

Prepared in cooperation with the U.S. Department of Housing and Urban Development
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Abstract

This report presents basic criteria, in the form of tables and graphs, for each of the four methods of hydrologic design most commonly used in the San Francisco Bay region--flood-frequency analysis, Rational Method, unit-hydrograph method, and runoff simulation by means of hydrologic basin modeling. The term "hydrologic design" as used in this report refers to the computation of either design values of peak discharge or design hydrographs of storm runoff. The hydraulics of open-channel and pipeline flow and the actual design of appurtenances for conveying the runoff are not discussed in this paper.


Use of the suggested criteria results in fairly close agreement between peak discharges computed by the flood-frequency and unit-hydrograph methods. Those peak discharges are not directly comparable with discharges computed by the Rational Method, in part because the results obtained by the Rational Method are affected by the values assigned to parameters for overland and channel flow. Those parameters are additional to the ones used in the flood-frequency and unit-hydrograph methods. A demonstration of runoff simulation by use of a hydrologic basin model is beyond the scope of this paper--such demonstrations are found in the appropriate references cited. However, this report does present an original technique for transposing storm rainfall in the region, storm transposition being commonly required to obtain the precipitation input used with hydrologic basin models.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Suggested criteria for hydrologic design of storm-drainage facilities in the San Francisco Bay Region, California
Series title:
Open-File Report
Series number:
71-341
Year Published:
1971
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Menlo Park, CA
Description:
v, 69 p.
Country:
United States
State:
California
Other Geospatial:
San Francisco Bay