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Research about Texas

Source-linked reports with geographic coverage including Texas.

At least 1,243 records · Page 69Linked to original sources
USGS1975

Hydrologic data for Little Elm Creek, Trinity River Basin, Texas, 1973

The U.S. Soil Conservation Service is actively engaged in the implementation of flood- and soil-erosion reducing measures in Texas under the authority of "The Flood Control Act of 1936 and 1944" and "Watershed Protection and Flood Prevention Act" (Public Law 566), as amended. The Soil Conservation Service has found that approximately 3,500 floodwater-retarding structures would be physically and economically feasible in Texas. As of September 30, 1973. 1,587 of these structures had been built.

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USGS1975

Maps showing drift patterns along the north-central Texas coast, 1973-1974

An investigation of the rates and directions of drift in the northwestern Gulf of Mexico was initiated in January 1970 as part of a program to study depositional processes and sediment movement off the southern Texas coast. The first phase of that program, a study of coastal drift off south Texas, was reported by Hunter and others (1974). They reported on a three-year program of seasonal releases of both bottom and surface drifters on the south Texas shelf; this study confirmed the hypothesis that the yearly cycle of coastwise water movement is largely controlled by seasonally changing winds. They also showed complex convergences of both surface and bottom waters which shift along the coast, as well as a layered drift structure which periodically directs surface and bottom waters in opposite directions. Results of several drift studies in the northwestern Gulf of Mexico which preceded this study are summarized by Hunter and others (1974). The second phase began in July 1973, when the study was shifted to the coast off north-central Texas . This report presents the first year results in the north-central area where studies are continuing.

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USGS1975

Environmental tritium in the Edwards Aquifer, central Texas 1963-71

Tritium concentrations of samples from 50 wells and springs in the Edwards aquifer in the San Antonio area of Texas have been analysed. Tritium now in the aquifer is partly natural cosmic ray produced tritium, but most is tritium produced by atmospheric thermonuclear tests in the 1950's and early 1960's. The tritium levels in atmospheric precipitation and streams recharging the Edwards are presented for comparison with the ground-water data. In general, tritium distribution within the Edwards confirms the accepted pattern of water flow within the aquifer. Concentrations of greater than 20 tritium units occur in the recharge areas, while less than 1 tritium unit is present along the aquifer's southern and southeastern boundary.

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USGS1975

Uranium in West Texas -- paper delivered June 3, 1975, AAPG-SEPM Rocky Mountain Section Meeting, Albuquerque, New Mexico

In west Texas, the part north of the Pecos River, anomalous uranium concentrations occur in the Tecovas and Trujillo Formations of the Dockum Group of Late Triassic age, the Edwards Limestone of Early Cretaceous age, the caliche caprock of the Ogallala Formation of Pliocene age, and the Pleistocene Blanco and Tule Formations, Rita Blanca lakebed deposit, and Bandelier and Pearlette ashes. The occurrences in Pleistocene rocks are a mere curiosity at this time, except the Rita Blanca lakebed deposit is large and of higher grade than the rest. Several occurrences of low-grade rock in the caliche caprock of the Ogallala Formation southeast of Lubbock are of interest because of the recent discoveries of large deposits in calcrete (caliche) in Western Australia. The single occurrence of ore-grade material in Cretaceous limestone is probably insignificant. Most of the ore-grade material is found in the Dockum Group, chiefly in the Trujillo Formation and mainly near Post. I plan to briefly describe the geographic and geologic setting of each group of deposits and to assess each group's resource potential.

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USGS1975

Time-of-travel of solutes in the Trinity River basin, Texas, September 1973 and July-August 1974

The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers and the Trinity River Authority of Texas, conducted timee-of-travel studies in the Trinity River basin during a period of low flow September 19-23, 1973, and during a period of moderate flow July 23-August 1, 1974. The purpose of these two studies was to provide data that could be used by the Trinity River Authority as part of the basic input to a mathematical water-quality model of the river. The model is being developed as part of a comprehensive water-quality management plan for the basin.

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USGS1975

Land-surface subsidence at Seabrook, Texas

Removal of water, oil, and gas from the subsurface in Harris and Galveston Counties, Texas, has caused a decline in fluid pressures, which is turn had resulted in subsidence of the land surface. Subsidence of the land surface at Seabrook is due principally to the removal of water. Significnt subsidence of the land surface probably began after 1920, and a minimum of about 3.3 feet and a maximum of about 4.3 feet of subsidence had occurred at Seabrook by 1973. Probable future subsidence was calculated by two different methods for each of two different loading situations. In the first loading situation, the artesian heads in the Alta Loma Sand (Rose, 1943) and Evangeline aquifer would continue to decline at the respective rates of 8 feet per year and 7 feet per year until 1980 and then cease. In the second loading situation, the artesian heads in the Alta Loma Sand and Evangeline aquifer would continue to decline at rates of 8 and 7 feet per year ulntil 1990 and then cease.

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USGS1974

Hydrologic data for Little Elm Creek, Trinity River Basin, Texas, 1972

The U.S. Soil Conservation Service is actively engaged in the installation of flood- and soil-erosion reducing measures in Texas under the authority of "The Flood Control Act of 1936 and 1944" and "Watershed Protection and Flood Prevention Act" (Public Law 566), as amended. The Soil Conservation Service has found a total of approximately 3,500 floodwater-retarding structures to be physically and economically feasible in Texas. As of. September 30, 1972, 1,551 of these structures had been built.

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USGS1974

Hydrologic data for Pin Oak Creek, Trinity River Basin, Texas, 1972

The U.S. Soil Conservation Service is actively engaged in the installation of flood- and soil-erosion reducing measures in Texas under the authority of "The Flood Control Act of 1936 and 1944" and "Watershed Protection and Flood Prevention Act" (Public Law 566), as amended. The Soil Conservation Service has found a total of approximately 3,500 floodwater-retarding structures to be physically and economically feasible in Texas. As of September 30, 1972, 1,551 of these structures had been built.

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