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A summary of preliminary studies of sedimentation and hydrology in Bolinas Lagoon, Marin County, California

Circular 627

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Abstract

The U.S. Geological Survey is investigating sedimentary and hydrologic conditions in Bolinas Lagoon, a 1,100-acre lagoon 15 miles northwest of San Francisco. The program began in May 1967 and will continue into 1970. Only the study results analyzed before June 1968 are summarized in the report. Two series of measurements of suspended-sediment load and water discharge in the lagoon inlet showed that much of the suspended sediment is sand and that the average velocity was as much as 4.7 feet per second. Littoral drift near the inlet was generally toward the inlet, whereas farther from the inlet the pattern is irregular. Circulation velocities in the lagoon decrease rapidly away from the inlet, but probably remain high enough to erode bottom sediment along the channels. In most of the lagoon median size of bottom sediment was fine sand. Sediment was derived chiefly from Monterey Shale.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
A summary of preliminary studies of sedimentation and hydrology in Bolinas Lagoon, Marin County, California
Series title:
Circular
Series number:
627
Edition:
-
Year Published:
1970
Language:
ENGLISH
Publisher:
[U.S. Geological Survey],
Description:
iii, 22 p. :maps. ;27 cm.