The Pecos River Basin alluvial aquifer, hereinafter referred to as the "Pecos aquifer", is located in western Texas and southeastern New Mexico. The aquifer is primarily composed of alluvial sand and gravel deposits mantled by sand and silt. The Pecos aquifer overlies Permian, Triassic, and Cretaceous-age rocks. The saturated thickness of the aquifer ranges from 0 to 1000 feet. The aquifer can provide highly productive wells where transmissivity is high and saturated thickness is adequate (HA730-E). This data release contains the following feature datasets: Georeferenced images: 1. i_12PCSRVR_bot.tif: Scanned figure of altitude contour lines representing the bottom of the Pecos aquifer. The original figure was from the Groundwater Atlas (HA730-E) figure 28. Extent shapefiles: 1. p_12PCSRVR.shp: Polygon shapefile containing the areal extent of the Pecos aquifer (Pecos_AqExtent). The extent file contains no aquifer subunits. Contour line shapefiles: 1. c_12PCSRVR_bot.shp: Contour line dataset containing altitude values, in feet reference to National Geodetic Vertical Datum of 1929 (NGVD29), across the bottom of the Pecos aquifer (HA730-E). These data were used to create the ra_12PCSRVR_bot.tif altitude raster dataset. Altitude raster files: 1. ra_12PCSRVR_top.tif: Altitude raster dataset of the top of the Pecos aquifer. The altitude values are in meters reference to North American Vertical Datum of 1988 (NAVD88). The top of the aquifer is assumed to be land surface (NED, 100-meter) based on available data. 2. ra_12PCSRVR_bot.tif: Altitude raster dataset of the bottom of the Pecos aquifer. The altitude values are in meters reference to NAVD88. Depth raster files: 1. rd_12PCSRVR_top.tif: Depth raster dataset of the top of the Pecos aquifer. The depth values are in meters below land surface (NED, 100-meter). The top of the aquifer is assumed to be at land surface (NED, 100-meter) based on available data. 2. rd_12PCSRVR_bot.tif: Depth raster dataset of the bottom of the Pecos aquifer. The depth values are in meters below land surface (NED, 100-meter).

This data set represents the extent of the Roswell Basin aquifer system in New Mexico.

This data set represents the extent of the Rio Grande aquifer system in the states of Colorado, New Mexico, and Texas.

This data set represents the extent of the Texas coastal uplands aquifer system in Texas.

This dataset contains annual Rio Grande Project surface-water allotments and diversion allocations from 1940 through 2014 to lands within New Mexico, Texas, and Mexico. Allotment and allocation values were extracted from the Allocation spreadsheet (Ferguson, I., Bureau of Reclamation, written commun., 2016). Allotment values are presented in units of acre-feet per acre. Allocation values are presented in units of acre-feet.

SWPA_alvbsn is a vector dataset of alluvial-fill basin statistics for the Southwest United States. Statistics for each basin include physical details such as area, landcover, elevation, slope and precipitation. Anthropogenic data for basin include landuse, population, and wateruse.

This raster dataset represents the boundaries of the hydrogeologic areas of the Southwest Principal Aquifer (SWPA) study of the National Water Quality Assessment (NAWQA) program. It is a compilation of the pre-existing Hydrogeologic Areas of the Southwest Ground-Water Resources Project, with additional data from the Central and Coastal basins of California, Northern New Mexico Rio Grande Valley, and South Central Colorado San Luis Valley.

This is a release of data presented in the report "Binational Study of the Transboundary San Pedro Aquifer", Callegary and others, 2016: Callegary, J.B., Minjárez Sosa, I., Tapia Villaseñor, E.M., dos Santos, P., Monreal Saavedra, R., Grijalva Noriega, F.J., Huth, A.K., Gray, F., Scott, C.A., Megdal, S.B., Oroz Ramos, L.A., Rangel Medina, M., Leenhouts, J.M., 2016, Binational Study of the Transboundary San Pedro Aquifer: International Boundary and Water Commission. The United States and Mexico share waters in a number of hydrological basins and aquifers that cross the International Boundary. Both the United States and Mexico recognize that, in a region of scarce water and expanding populations, better scientific understanding of water quantity and quality in these aquifer systems would benefit decision makers planning and managing water resources on both sides of the border. A focus on the sustainability of the aquifer and the San Pedro River which it supports would benefit both Mexico and the United States. These include the fact that the aquifer is transboundary in nature, the river has an elevated ecological value because of the riparian ecosystem it sustains, and that water resources are needed to permit continued development. Recognizing these goals, an agreement was made to integrate hydrologic and other pertinent data from both countries and to proceed with this joint binational study of the San Pedro River transboundary aquifer.