CONVERSION FACTORS Multiply By To obtain acre 0.405 square hectometer acre-foot (acre-ft) .001233 cubic hectometer acre-foot per acre (acre-ft/acre) .001233 cubic hectometer per hectometer acre-foot per year (acre-ft/yr) .001233 cubic hectometer per year acre-foot per year per mile .0007663 cubic hectometer per year per [(acre-ft/yr)/mi] kilometer cubic foot (ft3) .02832 cubic meter cubic foot per second (ft3/s) .02832 cubic meter per second cubic foot per second per mile .0176 cubic meter per second per [(ft3/s)/mi] kilometer foot (ft) .3048 meter foot per day (ft/d) .3048 meter per day foot per mile (ft/mi) .1895 meter per kilometer foot per second (ft/s) .3048 meter per second foot per year (ft/yr) .3048 meter per year foot squared per day (ft2/d) .0929 meter squared per day gallon (gal) 3.785 liter gallon per day per foot 12.418 liter per day per meter [(gal/d)/ft] gallon per day per cubic foot .1072 liter per day per cubic meter [(gal/d)/ft3 ] gallon per day per square foot .3516 liter per day per square meter [(gal/d)/ft2 ] gallon per minute (gal/min) .06308 liter per second inch (in.) 25.4 millimeter inch per year (in/yr) 25.4 millimeter per year mile (mi) l.609 kilometer mile per hour (mi/h) .447 meter per second pound per square foot (lb/ft2) 16.01846 kilogram per square meter pound per square inch (lb/in2) 11.1239 kilogram per square centimeter square foot (ft2) .09294 square meter square mile (mi2) 2.590 square kilometer Temperature is given in degrees Fahrenheit (°F), which can be converted to degrees Celsius (°C) by the following equation: Temp. °C = (temp. °F − 32) / 1.8 Sea level: In this report, "sea level" refers to the National Geodetic Vertical Datum of 1929 (NGVD of 1929)—a geodetic datum derived from a general adjustment of the first-order level nets of both the United States and Canada, formerly called Sea Level Datum of 1929. VIII Contents ABBREVIATIONS AND DEFINITIONS Abbreviations: g/m3 gram per cubic meter m meter mg/L milligram per liter mL milliliter CEQA California Environmental Quality Act EIR Environmental Impact Report GIS geographic information system USGS U.S. Geological Survey UTM Universal Transverse Mercator Definitions: Calendar year January 1 through December 31 Runoff year April 1 through March 31 Rain year July 1 through June 30 Water year October 1 through September 30 Contents IX.