Filters: partyWithName: U.S. Geological Survey (X) > partyWithName: Texas Water Science Center (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Citation (1) Contacts Diana E Pedraza Jennifer T Wilson Geosciences and Environmental Change Science Center Allan K Clark Stephen P Opsahl More... Categories Data (1) Tag Types Theme (2) Place (2) USGS Scientific Topic Keyword (2) Harvest Set (2) Tag Schemes None (2) U.S. Board on Geographic Names (BGN) (1) View Results as: JSON ATOM CSV

Data for timescales of water-quality change in a karst aquifer, south-central Texas Continuous monitoring and discrete water-quality sampling were coupled in a karst aquifer to assess drivers and timescales of water-quality change. Water-quality data included environmental tracers of groundwater age (tritium [3H], tritiogenic helium-3 [3He-trit], sulfur hexafluoride [SF6], carbon-14 [14C], and radiogenic helium-4 [4He-rad]). All water quality data is available from the U.S. Geological Survey NWIS database (U.S. Geological Survey, 2019). Groundwater ages were estimated by calibration of environmental tracers to lumped parameter models of groundwater age for multiple samples collected at six groundwater wells using the program TracerLPM (Jurgens and others, 2012). The final estimates for mean groundwater... Tags: Aquifer vulnerability, Cycle 3, Dissolved gas, Edwards aquifer, Groundwater, All tags... Groundwater age, Hydrology, Karst, Lumped parameter modeling, NAWQA, Radiocarbon, Texas, Tritium, USGS Science Data Catalog (SDC), Water Quality, Water quality, Fewer tags Data release for bedrock geology and hydrostratigraphy of the Edwards and Trinity Aquifers within the Driftwood and Wimberley 7.5-Minute Quadrangles, Hays and Comal Counties, Texas at 1:24,000 scale The Edwards and Trinity aquifers are major sources of water in south-central Texas and are both classified as major aquifers by the State of Texas. The population in Hays and Comal Counties is rapidly growing, increasing demands on the area's water resources. To help effectively manage the water resources in the area, refined maps and descriptions of the geologic structures and hydrostratigraphic units (HSUs) of the aquifers are needed. This digital map database presents the detailed 1:24,000-scale bedrock hydrostratigraphic map as well as names and descriptions of the geologic and hydrostratigraphic units of the Driftwood and Wimberley 7.5-minute quadrangles in Hays and Comal Counties, Tex. These digital data... Categories: Data; Types: Citation; Tags: Balcones fault zone, Blanco River, Comal County, Corbula bed, Cretaceous, All tags... Edwards Group, Edwards aquifer, Geomorphology, Hays County, Hydrogeology, Kainer Formation, Lower Glen Rose Limestone, New Braunfels, Person Formation, San Antonio, Structural Geology, Texas, Trinity Group, Trinity aquifer, USA, USGS Science Data Catalog (SDC), United States, Upper Glen Rose Limestone, Washita Group, Wimberley, Woodcreek, bedrock geology, fault, groundwater, hydrogeology, hydrostratigraphy, karst, lithology, Fewer tags