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<br />49. Army [U.S.] Engineer District, 1977, Special flood hazard information report: South Platte River,
<br />Volume III, Logan-Sedgwick County, Colorado: Omaha, Nebr., 19 p.
<br />
<br />The study area includes the South Platte River and its floodplain in Logan and
<br />Sedgwick Counties, Colorado. Land use in the flood plain is mostly agricultural
<br />except for the areas adjacent to incorporated communities. Flood data were
<br />obtained from topographic maps, aerial photographs, historical sources, field
<br />studies, and U.S. Geological Survey stream gage records. The main flood season
<br />occurs from March through September with the most frequent flooding occurring
<br />during June. Annual peak discharges have been recorded throughout the year.
<br />Flooding results from heavy general rainfall or intense local rainfall, with or without
<br />snowmelt. The worst flood recorded at the USGS gage near Julesburg occurred on
<br />June 20, 1965. The flood discharged 37,600 cubic feet per second (cfs). The flood of
<br />April 1973 is used for comparison purposes. At the downstream study limit, this
<br />flood discharged 22,000 cfs and crested at 3,435.3 feet mean sea level (msl). At the
<br />same location, the 100-year flood would crest at 3,439.9 feet msl, while the 500-year
<br />flood would crest at 3,441.7 feet msJ. This study is intended for use in making land
<br />use planning and management decisions concerning flood plain utilization.
<br />
<br />50. Army [U.s.] Engineer District, 1977, Special flood hazard information report: South Platte River,
<br />Volume 1, Weld County, Colorado: Omaha, Nebr., 26 p.
<br />
<br />The study area includes the South Platte River and its flood plain in Weld County,
<br />Colorado. A large proportion of the flood plain contains agricultural land uses.
<br />Dense development patterns exist in the proximity of larger incorporated areas.
<br />Flood data were obtained from topographic maps, field studies, historical sources
<br />and stream gage records. The main flood season occurs from May through August,
<br />and results from heavy general rainfall or intense local thunderstorms, either of
<br />which may be augmented by snowmelt. The worst flood recorded at the Kersey gage
<br />occurred on May 8, 1973. The flood discharged 31,500 cubic feet per second (cfs), and
<br />crested at 4,586.3 feet mean sea level (msl). This flood is equivalent to the 100 year
<br />flood. At the same location, the 500 year flood would discharge 63,000 cfs and would
<br />crest at 4,588 feet msJ. These floods would primarily affect public utilities, public
<br />roadways, and agricultural properties and associated developments. This study is
<br />intended for use in making land use planning and management decisions regarding
<br />flood plain utilization.
<br />
<br />51. Arthur, M. A., 1990, The effects of vegetation on watershed biogeochemistry at Loch Vale
<br />watershed, Rocky Mountain National Park, Colorado: Ithaca, N.Y., Cornell University, Ph.D.
<br />dissertation.
<br />
<br />52. Arthur, M.A., and Fahey, T.J., 1989, Mass and nutrient content of decaying boles in an
<br />Englemann spruce subalpine fir forest, Rocky Mountain National Park: Can. J. For. Res., v. 20,
<br />p. 730- 737.
<br />
<br />53. Ashton, L. W., 1978, Influences on the geochemistry of ground water in Welby, Colorado:
<br />Boulder, Colo., Univ. of Colorado, MS thesis.
<br />
<br />54. Asquith, G.B., 1968, Origin of large kaolinite crystals in the lower Almond Formation in
<br />southwest Wyoming Upper Cretaceous: J. Sediment. Petrology, v. 38, no. 3, p. 948-949.
<br />
<br />18 Bibliography of Water-Related Studies, South Platte River Basln-.Colorado, Nebraska, and Wyoming
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