From purpose and scope: The purpose of this report is to present preliminary results of the study by the Geological Survey on the following: (1) The existing ground-water conditions in the shallow fresh-water system in the vicinity of the proposed Truscott Brine Lake (figure 1) and (2) the projection of the post-construction effects of the proposed Truscott Brine Lake on the fresh-water aquifer, especially in relation to changes in hydraulic head but also with respect to possible changes in the chemical quality of the ground water.

From purpose and scope: The purpose of this study is to provide data and hydrologic interpretations for use by the Bureau of Reclamation in evaluating and quantifying natural water losses that are known to occur along some reaches of the Nueces River. Specifically, this report presents data and analyses describing the conveyance characteristics of that reach of the Nueces River from Cotulla to Simmons.

From introduction: The U.S. Army Corps of Engineers, Fort Worth District, is studying the long-term availability of the existing ground-water supplies at North Fort Hood. In connection with this study, the Corps asked the U.S. Geological Survey to compile the available ground-water data, to collect data on current conditions, and to assess the effects of ground-water development in the vicinity of North Fort Hood. These items are presented in this report.

From purpose and scope: The purpose of this report is to describe and explain the historical, seasonal, and areal variations in the water quality of Lake Arlington between January 29, 1973, and August 20, 1981.

Purpose of this report: This report summarizes the variations of selected water-quality constituents and properties for Somerville Lake based on water-quality records collected from August 1975 to August 1980. The report also contains information on the watershed environment in relation to the quality of water in the impoundment.

From introduction: This report describes the results of 1980 sampling of ground-water pumpage for irrigation on the High Plains, one phase of the High Plains Regional Aquifer-System Analysis project. These data were collected to estimate the volume of irrigation water pumped during 1980 and to determine current trends in irrigation pumpage on the High Plains.

From purpose and scope: The overall purpose of the investigation was to provide information useful for designing recharge reservoirs above the Balcones Fault Zone and for managing these reservoirs for efficient and effective use of the ground- and surface-water resources. Major objectives were to define the distribution of streamflow losses along the streams, to quantify the natural losses, and to determine the influence of various hydrologic conditions such as antecedent conditions, ground-water levels, and flow regimes on recharge.