Net Ecosystem Production (NEP) of the Great Plains, United States [ More info] Geographic analysis of the changes in storage and release of carbon in this large area as land use patterns, especially agriculture, have changed.
USGS National Map of Surficial Mineralogy [ More info] Maps of exposed surface mineral groups derived from automated spectral analysis of satellite and airborne imaging systems; these data suggest areas that may contain mineral deposits of various types.
Assessment of undiscovered oil and gas resources of the Anadarko Basin Province of Oklahoma, Kansas, Texas, and Colorado, 2010 [ More info] We estimated mean technically-recoverable undiscovered continuous and conventional resources that total 495 million barrels of oil, 27.5 trillion cubic feet of natural gas, and 410 million barrels of natural gas liquids in this area.
Assessing the vulnerability of public-supply wells to contamination--Edwards aquifer near San Antonio, Texas [ More info] Well vulnerability results from the young age of groundwater. Karst features permit contaminants to move into the aquifer easily, leading to a well mixed aquifer; geochemical processes do not degrade contaminants quickly.
Occurrence, distribution, and concentrations of selected contaminants in streambed- and suspended-sediment samples collected in Bexar County, Texas, 2007-09 [ More info] Study showing which chemicals found in sediments were most common, with methods used and likely consequences of their high concentrations.
Assessment of potential coastal impacts: Hurricane Rita [ More info] Areas susceptible to inundation during landfall of Hurricane Rita are assessed by comparing lidar-derived dune elevations to simulated storm surge values. Results shown on pictorial maps.
Evaluating the variability of sediment and nutrient loading from riverine systems into Texas estuaries and bays [ More info] Some results from a study of the variability of sediment and nutrient loads in the lower reaches of the Trinity River during a variety of hydrologic conditions.
Historical streamflows of Double Mountain Fork of Brazos River and water-surface elevations of Lake Alan Henry, Garza County, Texas, water years 1962-2010 [ More info] Shows graphs illustrating available data from two surface-water monitoring stations near this reservoir supplying water for the city of Lubbock.
Organic compounds in Elm Fork Trinity river water used for public supply near Carrollton, Texas, 2002-05 [ More info] We identified six compounds at concentrations less than human-health benchmarks, but within a factor of 10 of those limits. Those compounds might warrant further study to understand their transport and fate within the watershed.
USGS Zebra Mussel Monitoring Program for north Texas [ More info] General characteristics of this invasive freshwater mollusk, focusing on how we monitor its presence and migration through this region.
Alphabetical Index of Topics
a b c d e f g h i j k l m n o p q r s t u v w x y z