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WSP02173
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Last modified
7/29/2009 10:50:34 PM
Creation date
10/11/2006 10:57:12 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8210.137
Description
Colorado River Basin-Colorado River Basin Organizations/Entities-Colorado River Forecast Committee
State
UT
Date
4/1/1984
Author
NOAA
Title
Water Supply Outlook for Utah
Water Supply Pro - Doc Type
Report/Study
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<br />... . <br /> <br />2 <br /> <br />precipitation is below normal and moderate temperatures prevail, the flood <br />potential will be dramatically reduced. <br /> <br />With some slides already occurring along the Wasatch Front, the threat of <br />additional slides through the snowmelt runoff period (April-June) is very real. <br />Spring rains and/or continued snowmelt could easily trigger points susceptible <br />to slides and all interests should be prepared and monitor these prone areas. <br /> <br />SOUTHERN UTAH: Water supply forecasts for most of southern Utah remain well <br />above normal. The exception to this pattern would be the Virgin River basin <br />which is expected to be near normal. <br /> <br />March precipitation was very spotty. An area from Minersville northeastward <br />to Richfield and Kanosh received over 150 percent of normal. Surrounding <br />areas like Zion Nacional Park, New Harmo~', Alton and Orderville all received <br />50 percent of normal or less. Seasonal precipitation remains below normal in <br />the Virgin River basin; near normal in the upper Sevier and Coal Creek drainages, <br />and above normal on the lower Sevier and San Pitch drainages. <br /> <br />Snow measurements on April 1 remain above normal over southern Utah with the <br />exception of the Virgin Basin. Som=average basin snowpacks include: Upper <br />Sevier - 95%; Lower Sevier - 172%; Beaver - 146%; and Virgin River basin - <br />50 %. <br /> <br />March runoff was well above normal throughout the basin with the flow on the <br />Sevier River at Hatch, 5700 acre-feet, 146% of normal; Inflow Sigurd to <br />Gunnison - 40,000 acre-feet, 506%; Sevier River at Gunnison - 80,000 acre-feet, <br />390%: and the Beaver River at Beaver - 1,650 acre-feet, 150%. <br /> <br />Reservoir storage in the Sevier Basin continues to be well above normal with <br />the combined contents of Otter Creek, Fiute and Sevier Bridge reservoirs at <br />91% of capacity and 151% of the April 1 average. <br /> <br />Flood potential for this spring is high, particularly in the San Pitch and lower <br />Sevier basins. A cold, wet spring will increase the flood. potential; a dry <br />spring with moderate temperatures will reduce the threat of flooding. <br /> <br />EASTERN UTAH: The water supply outlook is for above normal streamflows during <br />the spring snowmelt. Forecasts range from 113% on the West Fork Duchesne River <br />near Hanna to 214% of average for inflow to Scofield Reservoir. Flood poten- <br />tial, for eastern Utah, varies but is highest in the Huntington, Price, San <br />Rafael, Strawberry and lower Duchesne drainages. <br /> <br />A~rch precipitation was below normal in the Uintah basin and 100 to 150 percent <br />of average along the Wasatch mountains. Precipitation totals for October <br />through March range from 120 to 200 percent of average. <br />
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