Publications

Water in Cedar Creek Reservoir in northeast Texas had volume-weighted average concentrations of less than 140 milligrams per liter of dissolved solids, less than 30 milligrams per liter of dissolved sulfate, and less than 25 milligrams per liter of chloride between vh nuary 1977 and August 1984. The water was soft to moderately hard; the total hardness concentrations ranged from 55 to 75 milligram

No abstract available.

No abstract available.

No abstract available.

Hydrologic investigations of urban watersheds in Texas were begun by the U.S. Geological Survey in 1954. Studies are now in progress in the Austin and Houston areas, and have been completed in the Dallas-Fort Worth and San Antonio areas. The U.S. Geological Survey, in cooperation with the city of Houston, began studies in the Houston metropolitan area in 1964. The program was expanded in 1968 to i

Statistical and graphical -.summaries of selected water-quality and'" streamflow data collected between 1964 and 1985 at the Trinity River near" Crockett are presented to document the baseline water quality of the Trinity River at this location. Dissolved oxygen exceeded 7.0 milligrams per liter in more than 50 percent- of the samples analyzed. The mean value of pH'was 7.4 units; the mean values o

Hydrologic investigations of urban watersheds in Texas were begun by the U.S. Geological Survey in 1954. Studies are now in progress in Austin, and Houston. Studies have been completed in the Dallas, Fort Worth, and San Antonio areas. The Geological Survey, in cooperation with the Texas Department of Water Reources, began hydrologic studies in the Austin urban area in 1954. In cooperation with the

Water-resources activities in Texas include collecting of hydrologic data, performing interpretive studies, and conducting research. This report describes the activities of the Water Resources Division of the U.S. Geological Survey in Texas for fiscal years (October to September) 1985 to 1986.

This report consists of: (1) four maps that present data on water level changes during 1977-87 and 1986-87 in the Chicot and Evangeline aquifers, and in the Houston-Galveston region, Texas, and (2) one set of graphs and one map that present data on land subsidence caused by compaction of sub-surface materials for 1973-87. (USGS)

This report contains summary information on ground-water quality in one of the 50 States, Puerto Rico, the Virgin Islands, or the Trust Territories of the Pacific Islands, Saipan, Guam, and American Samoa. The material is extracted from the manuscript of the 1986 National Water Summary, and with the exception of the illustrations, which will be reproduced in multi-color in the 1986 National Water

Since 1973, personnel of the Texas District, Water Resources Division of the U.S. Geological Survey have written and published approximately 300 reports concerning the water resources of Texas. These reports vary considerably in subject matter, complexity, format, desired audience, and publication outlet. Some of the reports have been published in different outlets of U.S. Geological Survey formal

The purpose of this report, which was prepared in cooperation with the City of Houston and the Harris-Galveston Coastal Subsidence District, is to show the altitudes of water levels in wells in the Chicot and Evangeline aquifers in the Houston, Texas, metropolitan area.  The maps are based on water-level measurements in the Spring of 1987 in about 400 wells.