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<br />n'~ ~'~*l' <br />1.... _' '~ ,jI .~ .,;; <br /> <br />CONTENTS <br /> <br />v <br /> <br />22. Photographs of snow cover in the Cascades, Washington <br />a. April 1976 . . . . . . . . . . . . . . . . . 56 <br />b. April 1977 . . . . . . . . . . . . . . . . . 57 <br />23. Map of California-WRC Region 18 . . . . . . . . 61 <br />24. Graph of water content of snowpack in California as a <br />percentage of the April 1 average. . . . . . . . . . 63 <br />25. Graph of monthly mean discharges for four selected drought <br />years, North Fork American River at North Fork Dam, Calif. 64 <br />26. Graph showing trends in streamflow at selected sites in <br />California, October 1975 to January 1978 . . . . . . . .. 65 <br />27. Photographs showing depleted conditions of water in <br />storage in two reservoirs <br />a. Pardee Reservoir near Valley Springs, Calif., March 26, 1977. 67 <br />b. Shasta Lake near Redding, Calif., September 5, 1977 .. 67 <br />28. Map of California showing ground-water level changes 1975-77 68 <br />29. Map of Sacramento-San Joaquin Delta showing annual <br />maximum intrusion of salinity for selected years 70 <br />30. Map of Hawaii-WRC Region 20 . . . . . . . . . 72 <br /> <br />CONVERSION FACTORS <br /> <br />Inch-pound Multiply by Metric <br />acre 4.047 x 10-3 km 2 (square kilometer) <br /> 0.4047 2 <br /> hm (square hectometer) <br />acre-ft (acre-foot) 1.233 x 10-3 hm 3 (cubic hectometer) <br />board-foot 2.360 x 10-3 m3 (cubic meter) <br />bushel 35.24 L (liter) <br />bushels per acre 0.0871 m 3/hm 2 (cubic meter per <br /> square hectometer) <br />ft 3/s (cubic foot per second) 28.32 x 10-3 m 3/s (cubic meter per <br /> second) <br />ft (foot) 0.3048 m (meter) <br />gal/d (gallons per day) 3.785 x 10-3 m 3/d (cubic meters per day) <br />bgd (billion gallons per day) 3.785 hm 3 /d (cubic hectometers <br /> per day) <br />in. (inch) 25.40 mm (millimeter) <br />mi (mile) 1.609 km (kilometer) <br />mi2 (square mile) 2.590 km 2 (square kilometer) <br />