Publications

Airborne-electromagnetic and earth-resistivity surveys were used to explore for fresh ground water in the Hueco Bolson southeast of El Paso, Texas. Aerial surveys were made along about 500 miles (800 km) of flight line, and 67 resistivity soundings were made along 110 miles (180 km) of profile. The surveys did not indicate the presence of any large bodies of fresh ground water, but several areas m

No abstract available.

A digital computer-simulation model of the Wenonah-Mount Laurel aquifer is used to evaluate the aquifer's capabilities of meeting the projected future demands and to study the cause of the rapidly declining water levels. The modelled area includes 1,500 square miles (3,885 square kilometres) of the New Jersey Coastal Plain and includes all the important centers of pumping in Monmouth, Burlington,

No abstract available.

Hydrogen sulfide and color occur in objectionable amounts in ground water from the principal artesian aquifer in the Valdosta , Ga., area. Generally, water from wells south of Valdosta is high in hydrogen sulfide; water from wells north of the city is high in color. Water with high sulfate is likely to be a problem in wells deeper than about 540 ft. Heavy pumpage concentrated in a small area may c

Results of time-of-travel studies are presented in both tabular and graphical form for several flow conditions in the Susquehanna River from Binghamton, N.Y., to Clarks Ferry, Pa. This reach is approximately 240 miles (386 kilometres) long, measured along the center of the channel, and has a drainage area of about 19,700 square miles (51,000 square kilometres) at its downstream end. A solution of

From November 1973 to October 1974, the U.S. Geological Survey drilled four deep test holes to supplement hydrologic and geophysical studies evaluating fresh ground water in the basins of westernmost Texas. For each test, samples of drill cuttings were collect·ed, borehole geophysical logs were run, and water samples were collected from specific zones. The Leopold Guerra No. 1 test hole penetrated

The low-flow characteristics of the Pike River basin, Racine and Kenosha Counties were studied to determine the feasibility of Public Law 566 watershed-protection practices. Two seepage runs, one in October 1973, and the other in September 1974, showed that most of the low flow is combined treated-sewage and industrial cooling-water discharge. This effluent was 4.66 cubic feet per second (1.3 cubi

This report shows how information from 44 air-temperature, 59 precipitation, and 86 streamflow sites was converted to a common-time base of 1941-70, and how general relations were developed to extend the converted point values to unsampled sites.Two methods, regression and ratio, were used to convert the data to a common-time base. Both methods require a period of concurrent data at two sites. Aft

No abstract available.

The Helley-Smith bedload sampler operates on a pressure-difference principle and consists of an expanding nozzle, nylon-mesh sample bag , and external components for structural integrity and stability under flow conditions. The Helley-Smith bedload sampler has a hydraulic efficiency, the ratio of the mean velocity in the sampler nozzle to the mean ambient velocity, of approximately 1.54. Factors a

No abstract available.