<br />ODJ7u6
<br />
<br />4
<br />
<br />in the key well near Flowell was record-low for
<br />December.
<br />
<br />Nevada.-Runoff in northern Nevada was above
<br />median partly as a result of warm temperatures that
<br />reduced ice storage. Withdrawals reduced Lake
<br />Tahoe storage by 25,000 acre-ft, but other reservoirs
<br />had minor increases. Stored water in most of the
<br />major reservoirs equaled or exceeded that of a year
<br />ago and was well above average.
<br />
<br />California.-Runoff continued below median and waf:!
<br />deficient in several areas. but reservoir storage con...
<br />tinued generally at above average levels.
<br />
<br />Arizona.-Runoff was deficient except in the extreme
<br />southeast corner which was near median. Discharge
<br />of the key station, Little Colorado River near
<br />Cameron. was second lowest for December since 1920
<br />and that of the key station, Virgin River near Little-
<br />field; was second lowest since 1929. Combined stor-
<br />age in Lakes Mead and Mohave decreased to 130
<br />percent of average, 1,169,000 acre-ft more than that
<br />a year ago. Storage in the Salt and Verde River
<br />
<br />\
<br />
<br />system of reservoirs increased to 893,000 acre-ft,
<br />155 percent of average and 436,900 acre-ft more than
<br />a year ago. Storage in San Carlos Reservoir decreased
<br />to 107,900 acre-ft, 98 percent of average and 49,920
<br />acre-ft more than a year ago.
<br />
<br />New, Mexico.-Runoff in the San Juan River basin
<br />continued deficient and that in the Rio Grande basin
<br />continued to be below median. Conchas Reservoir on
<br />the Canadian River and the larger reservoirs on the
<br />Pecos River remained nearly full. Actual flow at the
<br />key station Rio Grande at Otowi Bridge, as in November,
<br />was higher than shown owing to the release during the
<br />month of 38,000 acre-ft from EI Vado Reservoir. This
<br />release combined with the natural flow of Rio Grande
<br />increased the storage in Elephant Butte and Caballo
<br />Reservoirs to 1,135,000 acre-ft, 142 percent of the
<br />20-year average.
<br />
<br />The level in the Dayton key well declined to a record-
<br />low stage, but the levels in the other key wells rose
<br />slightly. Despite this rise, record-low levels for
<br />December were measured in the Lovington and
<br />Deming wells.
<br />
<br />,
<br />\
<br />I
<br />
<br />Prepared by O. D. Mussey, E. W. Reed, and]. K. Searcy.
<br />Note, -All statements and comparisons concerning storage refer to
<br />conditions as of the end of month, unless stated othenv:ise.
<br />
<br />,
<br />f
<br />f
<br />;
<br />f
<br />
<br />NEW GEOLOGICAL SURVEY REPORTS
<br />
<br />Bulletin 1071-B. Geologic reconnaissance of San Clements Island, California, by F. H. Olmsted. 1958.
<br />p. 55-68, pI. 1. Price, 75c, from the Superintendent of Documents, Washington 25, D. C.
<br />
<br />Water-Supply Paper 1429. Reconnaissance of the geology and ground water of the Khorat Plateau, Thailand,
<br />by P. E. LaMoreaux and others. 1958. p. 1-62, pIs, 1-9, figs. 1-11. Price, $1.25, from the Superintendent of
<br />Documents, Washington 25, D. C,
<br />
<br />Circular 407. Floods of June-July 1957 in Indiana, by C. E. Schoppenhorst. 1958. p. 1-32, fig,s. 1-14.
<br />Free on application to Geological Survey, Washington 25, D. C.
<br />
<br />IIfr._DUP. S!C., IASH_, D.C. ~ 1 ~ 90
<br />
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