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D.M. Clay

Publications and source records attributed to D.M. Clay.

2 recordsLinked to original sources
USGS1981

Map showing ground-water conditions in the Sacramento Valley area, Mohave County, Arizona; 1979

The Sacramento Valley area includes about 800 2 miles in northwestern Arizona and is bounded on the west by the Black and Buck Mountains and on the east by the Cerbat and Hualapai Mountains. The Black Mountains consist mainly of volcanic rocks; the Buck, Cerbat, and Hualapai Mountains consist of igneous, metamorphic, and volcanic rocks (Gillespie and Bentley, 1971, pl. 1). Sacramento Valley slopes gently southward and is underlain by alluvium and volcanic rocks to depths of more than 4,000 ft. Gillepsie and Bentley (1971, p. 1-15) divided the alluvium into three units - older, intermediate, and younger alluvium - and the volcanic rocks into two units - older and younger volcanic rocks.

Arizona↗
USGS1979

Maps showing ground-water conditions in the northern part of the Gila River drainage from Painted Rock Dam to Texas Hill area, Maricopa, Pima, and Yuma Counties, Arizona; 1978

The Gila River drainage from Painted Rock Dam to Texas Hill area includes about 3,000 square miles in southwestern Arizona. Ground-water development has taken place only in the northern part of the area, and only this part is included in the report. The southwestward-flowing Gila River drains the 1 ,900-square-mile northern part of the area. The main water-bearing unit is the valley-fill deposits. Since 1967, the estimated ground-water pumpage has exceeded 100,000 acre-feet per year, and in 1977 the ground-water pumpage was 210,000 acre-feet; the ground water is used mainly for irrigation. The ground-water withdrawals have resulted in general water-level declines in most of the area. Information shown on the maps includes change in water level, 1965-78 and 1973-78, and irrigated area; depth to water, altitude of the water level, and well depth; and specific conductance and fluoride concentration in the water. Hydrographs of the water level in selected wells and a table of historical pumpage also are included. Scale 1:250 ,000.

Arizona↗