Preliminary studies indicate that the Imperial Valley has a large geothermal potential. In order to delineate additional geothermal systems a chemical and isotopic investigation of samples from water wells, springs, and geothermal wells in the Imperial Valley and Yuma areas was conducted. Na, K, and Ca concentrations of nearly 200 well water, spring water, hot spring, and geothermal fluid samples from the Imperial Valley area were measured by atomic absorption spectrophotometry. Fournier and Truesdell's function was determined for each water sample. Suspected geothermal areas are identified. Hydrogen and oxygen isotope abundances were determined in order to determine and to identify the source of the water in the Mesa geothermal system. (JGB)

The major source of fresh water at Southport, North Carolina, is a confined multiple-aquifer groundwater system that can be affected in several ways by the proposed unlined cooling-water canal for the Brunswick nuclear power plant. The canal will route brackish water three miles from the Cape Fear Estuary to the plant condensers. The heated brackish effluent will then be routed six miles from discharge to the Ataantic Ocean. To evaluate the impact of the canal on the groundwater system, a mathematical model was used to describe steady-state responses resulting from a variety of conceivable hydrologic stresses. Numerical solutions were obtained by means of finite-difference approximations and a successive line overrelaxation solution technique. The model apprdximated three- dimensional saturated flow in aquifers of variable thickness by assuming two- dimensional flow in each aquifer with interaquifer transfer throughout the groundwater system. Simulation results indicated that saatwater from the estuary will eventually intrude upon Southport's municipal wells regardless of the presence of the proposed Brunswick canal. The canal system will not significantly decrease the time required for estuarine saltwater contamination of the wells. A major portion of the brackish water that downwells from the discharge canal appears to upwell in a parallel drainage …

This report summarizes and analyses H.R. 1070 as adopted by the House of Representatives, and revises and replaces the June 18, 1973 analysis of the Administrations trade bill (H.R. 6767).

This bibliography is a collection of materials that pertain to noise pollution and control in the United States.

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"CER Geonuclear has developed, in cooperation with the Atomic Energy Commission, a set of detailed plans utilizing nuclear explosives for an underground engineering experiment called project Rio Blanco. The overall objective is to prove the commercial feasibility of using nuclear explosives to recover commercial quantities of tightly held natural gas in the Piceance Basin."

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Abstract: This report contains lists of stations at which the U.S. Geological Survey collects water data either on a continuous basis or at least on a daily basis. The files contain daily values for streamflow, reservoir levels or contents, water temperatures, specific conductance, sediment discharge plus data for several other quality parameters that are measured by means of monitoring equipment or result from analyses of samples collected on a daily basis. The stations are listed according to station number within each State. The report lists the availanle retrieval options, the machine -readable output options, user charges and how to obtain data.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.