Accession Number : AD0722686

Title :   Bottom Sediment Characteristics near Entrance to San Francisco Bay.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV BERKELEY HYDRAULIC ENGINEERING LAB

Personal Author(s) : Johnson,J. W.

Report Date : APR 1971

Pagination or Media Count : 29

Abstract : The bed material in the Golden Gate, its approaches, and the adjacent beaches show a relatively small range in grain size--fine sand (125-250 microns) to coarse sand (500-1000 microns). Therefore, there appears to be no relatively coarse material of the gravel sizes available on the bottom which could serve as an armoring surface and thus control the frictional resistance to flow in and out of the Golden Gate. Generally, coarse material is found in those locations where the current velocities are high. From the limited data available, however, it appears that flow resistance in the Golden Gate and vicinity is probably controlled more by form resistance of ripples and sand waves than by grain size alone. (Author)

Descriptors :   (*OCEAN BOTTOM, SEDIMENTATION), (*SEDIMENTATION, BAYS), TRANSPORT PROPERTIES, PARTICLE SIZE, OCEAN CURRENTS, TIDES, STABILIZATION, INLAND WATERWAYS, HYDROLOGY, SAND, CALIFORNIA

Subject Categories : Physical and Dynamic Oceanography
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE