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WSP11116
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WSP11116
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Last modified
1/26/2010 3:16:10 PM
Creation date
10/12/2006 4:44:01 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8056
Description
Drought Preparedness
State
CO
Basin
Statewide
Date
2/1/1976
Author
Dept of Water Resour
Title
Special Report on Dry Year Impacts in California
Water Supply Pro - Doc Type
Report/Study
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<br />If precipitation is normal for the balance of the <br />water year, no recreation".l difficulty of any kind is expected <br />in the State. <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />If 1976-77 is a dry year following a dry 1975-76, <br />reservoir stages will be too low for boat launching at 30 to <br />40 percent of boat launching ramps. Large reservoirs such <br />as Oroville and Shasta will be less affected. These con- <br />ditions plus less aesthetic lake shore conditions could cut <br />normal visitor days by an estimated 40 to 50 percent at inland <br />reservoirs. Water use in state parks would probably be re- <br />stricted to drinking and cooking, especially in the central <br />and north coast areas which are heavily used. Since the State <br />Department of Parks and Recreation began management of reservoir <br />recreation in 1956, it has not experienced a condition as dry <br />as two lower quartile years in a rowand, therefore, has no <br />direct experience to draw on in anticipating problems. The <br />severe fire hazards which may occur could require closure of <br />some parks in high risk areas, and fire restrictions could be <br />necessary for most parks. If severe fires result, this would <br />affect quality of recreation in subsequent years because of the <br />natural environment destroyed and facilities lost. <br /> <br />Fish and wildlife <br /> <br />Reduced reservoir releases and low natural streamflows <br />to date have reduced spawning success of salmon and steelhead <br />and will reduce the survival rate of juvenile fish. These losses <br />will result in fewer adult salmon and steelhead three to four <br />years from now. Other fish and wildlife resources have not been <br />appreciably affected to date. <br /> <br />If a lower guartile water supply is experienced through <br />June 1976, stream angling for trout, particularly in mountain <br />streams, would be substantially better than normal this spring <br />but would fall to less than normal late in the season and in <br />the fOllowing year. Angling in natural mountain lakes wotild be <br />normal. There would be reduced stocking of trout in streams in <br />mid- and late- summer months due to low water levels. Additional <br />losses of nursery area for juvenile salmon, striped bass, and <br />steelhead would result in very noticeable lessening of runs in <br />subsequent years. Upland game and nongame birds would suffer <br />from reduced food supplies. Quail may not nest successfully if <br />a very dry spring occurs. Deer would have less natural forage, <br />and some losses due to malnutrition and attendant poor fawn <br />production and survival could be expected. Desert Bighorn Sheep <br />and other desert wildlife could be affected seriously because of <br />reduced or no flow in springs. Waterfowl would not be seriously <br />affected since water conditions are favorable in Canada where <br />most reproduction occurs. However, local reproduction may be <br />reduced substantially. In addition, some losses of waterfowl are <br />being experienced due to fowl cholera and botulism. Endangered <br /> <br />-20- <br />
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