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Author:
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Category : Hydrology
Languages : en
Pages : 298
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Author:
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Category : Hydrology
Languages : en
Pages : 128
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Category : Stream measurements
Languages : en
Pages : 468
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Author: Blakemore E. Thomas
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Category : Electronic government information
Languages : en
Pages : 90
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Author: Margot Truini
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Category : Groundwater
Languages : en
Pages : 62
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Author: Margot Truini
Publisher:
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Category : Groundwater
Languages : en
Pages : 54
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Author: Blakemore E. Thomas
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Category : Groundwater
Languages : en
Pages : 56
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The N aquifer is the major source of water in the 5,400-square-mile area of Black Mesa in northeastern Arizona. Availability of water is an important issue in this area because of continued industrial and municipal use, a growing population, and precipitation of about 6 to 14 inches per year. The monitoring program in the Black Mesa area has been operating since 1971 and is designed to determine the long-term effects of ground-water withdrawals from the N aquifer for industrial and municipal uses. The monitoring program includes measurements of (1) ground-water pumping, (2) ground-water levels, (3) spring discharge, (4) surface-water discharge, and (5) ground-water chemistry. In 2001, total ground-water withdrawals were 7,680 acre-feet, industrial use was 4,530 acre-feet, and municipal use was 3,150 acre-feet. From 2000 to 2001, total withdrawals decreased by 1 percent, industrial use increased by 1 percent, and municipal use decreased by 3 percent. From 2001 to 2002, water levels declined in 5 of 14 wells in the unconfined part of the aquifer, and the median change was +0.2 foot. Water levels declined in 12 of 17 wells in the confined part of the aquifer, and the median change was -1.4 feet. From the prestress period (prior to 1965) to 2002, the median water-level change for 32 wells was -15.8 feet. Median water-level changes were -1.3 feet for 15 wells in the unconfined part of the aquifer and -31.7 feet for 17 wells in the confined part. Discharges were measured once in 2001 and once in 2002 at four springs. Discharges decreased by 26 percent and 66 percent at two springs, increased by 100 percent at one spring, and did not change at one spring. For the past 10 years, discharges from the four springs have fluctuated; however, an increasing or decreasing trend is not apparent.
Author: David W. Anning
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Category : Stream measurements
Languages : en
Pages : 96
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Book Description
Examines measurement variances in estimations of consumptive use of Colorado River water by diverters from Hoover Dam to Mexico.
Author: A. D. Konieczki
Publisher: DIANE Publishing
ISBN:
Category : Government publications
Languages : en
Pages : 44
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Category : Geology
Languages : en
Pages : 438
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Author:
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Category : Government publications
Languages : en
Pages : 716
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