Water Supply and Irrigation Papers of the United States Geological Survey . w until the autumnal rains occur. Snowstorage has been made a subject of extended observation by F. Englebright, chief engineer of the South Yuba Canal Company,through whose courtesy the writer has been enabled to prepare a mostinstructive diagram of the accumulation, depth, and rate of melting ofsnow at Lake Fordyce (fig. 15). This lake has an elevation of 6,500feet above tide level, and is in a region over which the annual precipita-tion in rain and melted snow is 70 inches. Snow begins to accumulatelate in Nov
Water Supply and Irrigation Papers of the United States Geological Survey . w until the autumnal rains occur. Snowstorage has been made a subject of extended observation by F. Englebright, chief engineer of the South Yuba Canal Company,through whose courtesy the writer has been enabled to prepare a mostinstructive diagram of the accumulation, depth, and rate of melting ofsnow at Lake Fordyce (fig. 15). This lake has an elevation of 6,500feet above tide level, and is in a region over which the annual precipita-tion in rain and melted snow is 70 inches. Snow begins to accumulatelate in November, and reaches its maximum depth in packed snow inMarch. During the winter months the lower readings on the gage rodfollowing higher readings generally indicate a packing of the snow. 1 These figures are taken froni a map prepared, under the writers direction, for the CaliforniaWater and Forest Association, showing the drainage areas, the mean annual rainfall, and thedistribution of forests throughout the State. U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER NO. 46 PL. V. I. CANYON OF MIDDLE FORK OF YUBA RIVER
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