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Last modified
5/14/2010 8:58:17 AM
Creation date
9/30/2006 10:10:29 PM
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Publications
Year
1961
Title
Public Water Supplies of Colorado
CWCB Section
Interstate & Federal
Author
Gregg, Meyer, Targy, Moulder
Description
Summary of statistical data describing the source, treatment and volumes of water used for public supplies by Colorado cities and towns
Publications - Doc Type
Tech Report
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<br /> <br />other trends probably will increase the use of ground water: <br />(1) More efficient and less expensive desalinization processes <br />should accelerate the development of saline ground water, (2) <br />utilizing ground-water reservoirs to supplement and stabilize sup- <br />plies derived chiefly from surface-water sources is becoming more <br />popular, and (3) the improving economy and the increasing emphasis <br />on health standards may prompt more small towns to install munici- <br />pal systems. Also the trend toward decentralization of urban <br />populations is causing housing developments remote from cities to <br />seek ground-water supplies. The relative lack of legislation con- <br />trolling the development of ground water, as compared to that <br />establishing water rights for surface water, also appears to be <br />a factor that tends to increase the rate of development of ground <br />water. <br /> <br />Ground-water storage is many times greater than surface-water <br />storage, but this fact does not imply that potential development <br />of ground-water resources is in the same proportion. The amount <br />of ground water in storage probably exceeds 2 billion acre-feet: <br />whereas, the capacity of surface-water reservoirs has been esti- <br />mated at only 4.3 million acre-feet. Some of the ground-water <br />reservoirs, if depleted, would take many hundreds of years to <br />refill under natural conditions: by comparison, the time to fill <br />surface-water reservoirs can be measured in months and years. <br />Although the annual withdrawal of ground water might someday <br />exceed the annual potential use of surface water in Colorado <br />(estimated to be 7.6 million acre-feet), the rate of withdrawal <br />would greatly exceed the rate of replenishment and ultimately <br />would result in depletion of the resource. <br /> <br />CHEMICAL QUALITY OF WATER <br /> <br />As the municipalities of Colorado increase in size, develop- <br />ment of present sources of water will be expanded and development <br />of new sources of water may be required. These developments <br />necessitate an evaluation of the chemical quality of the water <br />resources in the vicinity of the municipalities. Data on the <br />chemical quality of the water now being used for public supplies <br />were obtained to provide preliminary information necessary for <br />such an evaluation. <br /> <br />For some municipalities, data were available in the files <br />of the U.S. Geological Survey and other agencies: and for other <br />municipalities, samples of water were obtained and analyzed in <br />1960 by personnel of the U.S. Geological Survey. Data for nearly <br />all municipalities of significant size in Colorado are given in <br />table 3, and descriptions of the points of collection of the <br />water samples are shown in table 4. The analyses are represent- <br />ative of untreated water from wells, streams, and reservoirs and <br />of treated water from distribution systems where the treatment <br />consists of chlorination only. Analyses of water for streams <br />that supply more than one municipality are not repeated in table 3 <br />but are referenced accordingly in the remarks column of table 4. <br /> <br />21 <br />
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