Summary of Optical-Backscatter and Suspended-Sediment Data, Tomales Bay Watershed, California, Water Years 2004, 2005, and 2006

Scientific Investigations Report 2007–5224

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5224

Conversion Factors

Inch/Pound to SI

Multiply	By	To obtain
Length
foot (ft)	0.3048	meter (m)
Area
square mile (mi²)	2.590	square kilometer (km²)
Volume
cubic foot (ft³)	0.02832	cubic meter (m³)
Flow rate
foot per second (ft/s)	0.3048	meter per second (m/s)
cubic foot per second (ft/s)	0.02832	cubic meter per second (m/s)
SI to Inch/Pound
millimeter (mm)	0.03937	inch

Dual units are used in this report. English units are used throughout with the exception of suspended-sediment concentration, grain size, and optical backscatter data, which are presented in milligrams per liter (mg/L), millimeters (mm), and millivolts (mV).

Abbreviations and Acronyms

ADAPS	automated data processing system
BU	backscatter units
FBU	formazin backscatter units
NTU	nephelometric turbidity units
OBS	optical backscatterance sensor
PRS	Point Reyes Station
SFRWQCB	San Francisco Bay Regional Water-Quality Control Board
SPT	Samuel P. Taylor (State Park)
SSC	suspended-sediment concentration
TMDL	total maximum daily loads

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