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WSP06497
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Last modified
1/26/2010 2:23:02 PM
Creation date
10/12/2006 1:40:42 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8270.100
Description
Colorado River Basin Water Quality/Salinity -- Misc Water Quality
Basin
Colorado Mainstem
Water Division
5
Date
1/1/1974
Author
USDOI
Title
Colorado River Water Quality Improvement Program - Status Report
Water Supply Pro - Doc Type
Report/Study
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<br />COLORADO RIVER MATHEMATICAL <br />MODELS <br /> <br />Two computerized mathematical models have been <br />developed for use in the Colorado River Water Quality <br />Improvement Program. The first of these models is <br />salinity oriented and serves as an accounting system for <br />determining the effect of salt loading at various points <br />on the surface water system. The more comprehensive <br />river basin model will simulate both quantity and <br />quality conditions of the river system including <br />interaction of surface water and ground water. <br /> <br />STATUS OF INVESTIGATIONS <br /> <br />PARADOX VALLEY UNIT, COLORADO <br /> <br />Paradox Valley contributes about 200,000 tons of salt <br />per year to the Dolores River in southwestern <br />Colorado. A control project would reduce this <br />contribution about 180,000 tons per year resulting in a. <br />reduction of the salinity concentration at Imperial <br />Dam of about 16 mg/I. <br /> <br />Investigations started in FY 1972 and a feasibility <br />report is scheduled for completion in FY 1975. <br />Ground.water observation wells have been drilled and a <br />resistivity study completed to determine the fresh <br />water/brine interface and the geologic formations of <br />the valley near the river. A pump test well has been <br />drilled and the pump testing was conducted in October <br />through December of 1973. <br /> <br />Based on data developed at this time, one alternative <br />would be to lower the fresh water/brine interface by <br />pumping wells along the Dolores River to 'prevent the <br />brine from entering the river. The estimated pump <br />discharge of 5-8 cfs would be transmitted via pipeline <br />to an evaporation and salt storage reservoir on the West <br />Fork of Dry Creek about 20 miles to the southeast. <br /> <br />GRAND VALLEY BASIN UNIT, COLORADO <br /> <br />The total quantity of salt contributed by the Grand <br /> <br />Valley Basin is about 600,000 tons <br />Alternatives under investigation include <br />management services and irrigation <br />improvement. <br /> <br />annually. <br />irrigation <br />systems <br /> <br />There are about 76,000 acres irrigated in the Grand <br />Valley area of western Colorado. Irrigation <br />management services were started in 1972 with about <br />1,000 acres on 46 separate farms spread throughout <br />the irrigated area. In 1973, the program was expanded <br /> <br />to 7,200 acres owned by 120 farmers. Early results <br />indicate that higher efficiencies are being obtained on <br />some sugar beet fields. The planned operations include <br />collection and analysis of yield reports for sugar beets, <br />malting barley, and other crops. <br /> <br />During 1973, salinity data base was increased by <br />adding ground-water wells, and collecting soil and <br />water samples. An intense monitoring of one isolated <br />area will begin in 1974. The irrigation management <br />services are scheduled for continuation through FY <br />1977 at which time the water users are expected to <br />asuume control of the operation. <br /> <br />,; <br /> <br />An investigation is underway to determine the best <br />methods of increasing water delivery efficiency. The <br />majority of the valley canals were built at an early date <br />and operated by private developers and basic data for <br />these systems such as maps, canal sizes, lengths, acreage <br />served, cropping patterns, and consumptive use and <br />requirements were lacking. Therefore, a good deal of <br />field data had to be collected before an adequate <br />system analysis could be made. Because many different <br />irrigation companies are involved, the valley has been <br />divided into 12 systems. Data have been collected and <br />tabulated on these systems and designs and estimates <br />have been prepared for several of them. Major items <br />that will be pursued are alternate methods of delivery, <br />system water requirements based upon projected land <br />use patterns, a complete hydrogeologic study of the <br />valley, and evaluation of the alternatives for economic <br />benefit to the local area and downstream salinity <br />impacts. The studies are scheduled for culmination in <br />an appraisal report in FY 1975. The combination of <br />water systems improvement and irrigation management <br />services could result in a reduction of about 200,000 <br />tons of total dissolved solids to the Colorado River and <br />a salinity concentration reduction of about 19 mg/I at <br />Imperial Dam. <br /> <br />CRYSTAL GEYSER UNIT, UTAH <br /> <br />The Crystal Geyser, an abandoned oil test well, located <br />3.5 miles south of Green River, Utah, contributes 200 <br />acre.feet of water and 3,000 tons of salt to the Green <br />River annually. Control of- this source would reduce <br />the salinity at Imperial Dam by about 0.3 mg/1. The <br />saline water erupts in the form of a geyser at 5-hour <br />intervals due to carbon dioxide accumulations. <br /> <br />" <br /> <br />The feasibility investigation of this unit was conducted <br />by Brigham Young University through a contract with <br />the Bureau of Reclamation. A feasibility report and <br />environmental assessment are in the final stages of <br />completion. One alternative would be to build a wall or <br /> <br />8 <br />
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