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Last modified
1/26/2010 4:14:30 PM
Creation date
10/12/2006 5:30:09 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8029
Description
Section D General Correspondence - Colorado Agencies
State
CO
Basin
Statewide
Date
8/24/1960
Author
Various
Title
Presentation of the Papers and Articles Read at the Western Resources Conference - Boulder Colorado
Water Supply Pro - Doc Type
Report/Study
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<br />0013J? <br /> <br />.... <br /> <br />Proper location of pumps includes ple.cing wells in areas of <br />shallow water to caPture water used by native vegetation, and spacing <br />of wells 80 that the storage of ground water can be manipulated. <br />Operation of pumps in conjunction with the surface supply entails <br />pumping during periods of deficient surface supply at a rate ~;J.ch <br />that the ground-water reservoir can be replenished during periods of <br />excess surface supply. A fully managed ground-water snd surface- <br />water supply not only will maintain but will increase the firm <br />supply because of (a) the savings in evaporation resulting from <br />storing surface water underground, (b) the capture of floodwaters by <br />surface reservoirs made vacant by storing water underground, (c) the <br />reduction of evapotranspiration losses by phrsatoplvtes, an:l. (d) the <br />recirculation of water by pUlllping. <br /> <br />., <br /> <br />Because of the large volwne of water in underground. storage in <br />rnaqy alluvial valleys, as compared with the volume of surface reservoirs, <br />a tUlly managed ilxtegrated system would be capable of providing a <br />finn supply that would span climatic cycles a decade or two long. <br />Theoretic~, it is pOSSible to control 8 supply to the extent that <br />no water would be allowed to flaw to the oceans. However, such a <br />system is not desirable or feasible, as the salt content of the water <br />would increase and the econoll\1 of the reg10n would suffer. A managed <br />system shouJ.d therefore provide for flushing out excess salt during <br />periods of excess precipitation and runoff. <br /> <br />'10" <br /> <br />The population of the 17 Western States is expected to continua <br />to increase at a rate exceeding the national average. The present 4.3 <br />million population of these States is expected to reach 108 million <br />in 40 years (u. S. Senate Select Committee on National Water Reeources, <br />1960c, p. 9). The need for industrial, municipal, and agricultural <br />water likewise is expected to increase. Competition for the limited <br />water supply will dictate systematic plan:cdng, coordination, and <br />integrated developnent and management of water suppUes. <br /> <br />Integrated development and management of surface and ground water <br />will require a better understanding ot: our groum-water resources and <br />the nature and sxt.Jnt of the squit:eI'll. The nature of ground-water <br />investigations i8 changing as the demaal. for water increases and the <br />limit of the ground-water resources is approached. Only sane 30 ;reare <br />ego most ground-water investigations went no further than to determine <br />the occurrence of water--that 1s, where could wells be drilled, and <br />what might be their expected yield? The concentrated development of <br />wells in some areas of the West brought questions o! well interference <br />and the need for quantitative studies of the effects of pumping. Such <br />questions prompted Theis to develop his well-knOliIl nonequllibrium <br />t:ormula in 1935. The trem toward f'u1l development of ground-water <br />resources and integration with surface-water develoj:lllent is creating <br />a demand for means of analyzing masses ot: geol\rdrologic data and <br />parSllleters to prOvide a basis for choosing among alternate plans for <br /> <br />9 <br />
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