Abstract: Extensive water withdrawal from Floridian aquifer in the urban Tampa Bay area has induced leakage from the overlying surficial aquifer adversely effecting the water table and lake levels. Artificial recharge could reduce the impact of these adverse effects. Four experiments were conducted to investigate possible recharge alternatives; sinkhole recharge, water-spreading, connector wells, and subsurface-tile drainage to a deep well. Experiments indicate that all four methods can be effective. However, the sinkhole recharge experiment moved the greatest potential for draining the surficial aquifer. Combinations of the four methods could be used where potential exists for downward movement of water and sufficient unsaturated aquifer for water storage.

This report investigates the effects of the sewage-sludge recycling site and a landfill site on the ground-water system of Denver. It includes several maps.

Report providing information about the water resources of the Munabo Valley in southeastern Puerto Rico, including the principal source of water, chemical composition, hydraulic conductivities, average transmissivity, and suggestions for water supplementation.

This report compares the techniques used to measure re-aeration coefficients for Black Earth Creek and the Madison Effluent Channel near Madison, Wisconsin using radioactive and modified tracers. It contains maps, graphs, and photographs.

This report examines carbon-dioxide discharge in seismically active zones around the world. It contains a map of the "world distribution of carbon dioxide springs and major zones of seismicity."

This report examines the region of the Piceance Creek basin in Colorado so that the United States Bureau of Mines may develop plans for an underground oil-shale research facility in the center of the basin. It includes maps, charts, and graphs.

This report describes the use of "radioactive and modified tracer techniques . . . to measure the re-aeration coefficients of two reaches each of Black Earth Creek and the Madison Effluent Channel near Madison, Wisconsin." It contains maps and graphs.

This report presents "a framework is presented for compiling available data for assessing statistical relationships between water quality and several factors of climate, physiography and land use" and includes several maps and graphs.

From abstract: An ARIMA (1, 0, 1) model is used to generate annual flow sequence at three sites in the Juniata River basin, Pennsylvania. The study was designed to analyze low-flow frequency characteristics of a basin. The model preserves the mean, variance, and cross-correlations of the observed station data.

This report describes the results of a computer model simulation of the Potomac-Raritan-Magothy aquifer system in New Jersey to see "the effects of supplementing ground water from the Delaware River. It includes tables.

Purpose and scope: The purpose of this study is to assess the impact of the development of Winslow Crossing on water resources., including the quantity and quality of streamflow, the quality of ground water, and water levels of the aquifer. Streamflow and water-quality data were collected for 7 years at four sites on the tributaries and the main stem of the Great Egg Harbor River. Water-quality data were also collected at an additional four surface-water sites. Water levels were recorded at four observation wells. These wells were sampled periodically for water-quality analysis. Samples were also taken from the main production well for Winslow Crossing.

Abstract: A study was conducted for the resolution of sediment source areas in the Big Sandy River basin, southwestern Wyoming. Suspended-sediment and bedload data were collected in order to determine total sediment transport at several locations within the basin. The bedload data were compared to the Einstein bedload function and total load data were compared to the Colby method. The bedload comparison showed a higher estimation of transport rates with Helley-Smith sampler measurements than with the Einstein beadload function. The Colby method yielded higher transport rates at high flows and lower transport rates at low flows than the measured total transport rate. The Big Sandy reservoir acts as a control in the basin. The area upstream of the reservoir was interpreted separately from the area downstream for source-area determination. In the arid plains upstream of the reservoir, the amount of sediment transported increased 98 percent with an increase in runoff of only 1 percent.

From introduction: One purpose of this study was to describe streamflows of the Green River and its tributaries. In addition to describing the cause and occurrence of streamflows in the study area, a brief discussion of how streamflow data are collected and summarized is presented as background information to users of this report who may be unfamiliar with streamflow measurement. The second and primary purpose of this study was to describe hydraulic characteristics of streams in the study area.

From Purpose and Scope: The objectives of the study and the purposes of this report are to provide a technique to estimate the magnitude and frequency of flood-peak discharges at ungaged sites and to determine the effects of urbanization on these flood peaks. Regression techniques were selected to make these estimates. The scope of the study is limited to streams in the Dallas-Fort Worth area.

This report evaluate the water quality of the three major tributaries to the Chesapeake Bay, the Susquehanna, Potomac, and James Rivers.

From introduction: The purpose of this report is to compile the available geologic information on the Kettleman City area of the Central Valley that would aid others in the proper management of the valley's ground-water resources.

Abstract: Sacramento County expected to begin operation of the Sacramento Regional Wastewater Treatment Plant in 1982. The California State Water Resources Control Board has ruled that the plant will not be allowed to release effluent into the Sacramento River when flow in the river is 4,000 cubic feet per second or less. Depending on tide condition, flows less than 4,000 cubic feet per second may occur either once or twice during each 24-hour 50-minute tide cycle when the daily mean flow is less than about 12,000 cubic feet per second. Daily mean flows less than 12,000 cubic feet per second occur about 28 percent of the time. Riverflow at the plant outfall is monitored by an acoustic streamflow measuring system. Regulation of effluent released from the plant will normally be based on real-time flow data computed by the acoustic system. A graphical method for determining the occurrence and duration of flows of 4,000 cubic feet per second and less was developed as a backup system to be used if a temporary failure in the acoustic system occurs.

This report evaluates the quality of the ground water in seven small contiguous stream basins in the coal area of Buchanan County, Virginia.

From purposes of approach of study: The purposes of this study were to: (1) Define, on a reconnaissance level, current (1979) water-quality conditions in major aquifers (water-yielding rock formations) in the eastern Snake River basin; (2) present available geologic and hydrologic data to assist in understanding the natural and man-caused factors that affect water-quality conditions; and (3) establish a hydrologic base upon which future comparisons can be made to evaluate changes.