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High radium (Ra) concentrations in potable portions of the Cambrian-Ordovician (C-O) aquifer system were investigated using water-quality data and environmental tracers ( 3H, 3Hetrit, SF6 , 14C and 4Herad) of groundwater age from 80 public-supply wells (PSWs). Groundwater ages were estimated by calibration of tracers to lumped parameter models and ranged from modern (1 Myr) in the most downgradient, confined portions of the potable system. More than 80 and 40 percent of mean groundwater ages were older than 1000 and 50,000 yr, respectively. Anoxic, Fe-reducing conditions and increased mineralization develop with time in the aquifer system and mobilize Ra into solution resulting in the frequent occurrence of combined...
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In 2016, the U.S. Fish and Wildlife Service, U.S. Geological Survey, and U.S. Army Corps of Engineers undertook a large-scale interagency field study to determine the influence of commercial barge vessels on the efficacy of the Electric Dispersal Barrier System (EDBS) in the Chicago Sanitary and Ship Canal (CSSC) in preventing fish passage. This study included a series of trials in which a tow, consisting of a tug vessel and six fully-loaded barges, transited the EDBS in both upstream-bound (n = 23) and downstream-bound (n = 22) directions. A 3,000 kHz SonTek Argonaut SW Acoustic Doppler Velocity Meter (ADVM) was mounted on the barge at the position of the rake-to-box junction. The ADVM faced outward from the side...
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The glacial aquifer system of the United States encompasses all or parts of 25 states and is the most widely used supply of drinking water in the Nation (Maupin and Barber, 2005; Maupin and Arnold, 2010). A series of seven raster data sets were derived from a database of water-well drillers' records that was compiled in partial fulfillment of the goals of the U.S. Geological Survey’s Groundwater Availability and Use assessment program (U.S. Geological Survey, 2002). They contain hydrogeologic information for areas of the U.S. that are north of the southern limit of Pleistocene glaciation, including the total thickness of glacial deposits, thickness of coarse-grained sediment within the glacial deposits, specific-capacity...
This dataset consists of digital scans of color infrared aerial photography from the Upper Mississippi River collected in 1975.
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The U.S. Geological Survey (USGS) has developed and implemented an algorithm that identifies burned areas in dense time series of Landsat image stacks to produce the Landsat Burned Area Essential Climate Variable (BAECV) products. The algorithm makes use of predictors derived from individual Landsat scenes, lagged reference conditions, and change metrics between the scene and reference conditions. Outputs of the BAECV algorithm consist of pixel-level burn probabilities for each Landsat scene, and annual burn probability, burn classification, and burn date composites. These products were generated for the conterminous United States for 1984 through 2015. These data are also available for download at https://rmgsc.cr.usgs.gov/outgoing/baecv/BAECV_CONUS_v1.1_2017/...
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The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) has created high-resolution land cover/use data sets for the Upper Mississippi River System (UMRS) from 1:15,000-scale color infrared aerial photos. These data have been used to create a variety of products, one of which is a data set used to classify aquatic areas. The 1989 and 1991 aquatic areas data sets were created by first generalizing the available land cover/use data into a land/water data set, then reinterpreting the aerial photography within the areas classified as water to determine the type of aquatic area. The geographic extent of the UMRS is the Mississippi River floodplain from Cairo, IL to Minneapolis, MN and the Illinois...
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The U.S. Geological Survey's Upper Midwest Environmental Sciences Center (UMESC) has created high-resolution land cover/use data sets for the Upper Mississippi River System (UMRS) from 1:15,000-scale color infrared aerial photos. These data have been used to create a variety of products, one of which is a data set used to classify aquatic areas. The 1989 and 1991 aquatic areas data sets were created by first generalizing the available land cover/use data into a land/water data set, then reinterpreting the aerial photography within the areas classified as water to determine the type of aquatic area. The geographic extent of the UMRS is the Mississippi River floodplain from Cairo, IL to Minneapolis, MN and the Illinois...


map background search result map search result map Landsat Burned Area Essential Climate Variable products for the conterminous United States (1984 - 2015) USGS Small-scale Dataset - Congressional Districts of the United States - 110th Congress 200710 Shapefile USGS Small-scale Dataset - Congressional Districts of the United States - 112th Congress 201101 Shapefile Velocity profiling at the US Army Corps of Engineers Electric Dispersal Barrier in the Chicago Sanitary and Ship Canal during passage of fully loaded commercial tows: Barge Mounted Argonaut SW Total Thickness of Glacial Deposits 1989 Aquatic Areas - Upper Mississippi River System - Pool 20 USGS Topo Map Vector Data (Vector) 862 Ames, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 24870 Landes, Illinois 20180625 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 42269 South Pekin, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for South Wayne, Wisconsin 20160516 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 47080 Wacker, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 48160 West Chicago, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 48189 West Frankfort, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Brodhead West, Wisconsin 20160516 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 5553 Broadwell, Illinois 20180625 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 31415 Nauvoo, Illinois 20180625 for 7.5 x 7.5 minute Shapefile USGS Combined Vector for Montpelier, Iowa 20160513 7.5 x 7.5 minute Shapefile 1989 Aquatic Areas - Upper Mississippi River System - Lockport Pool Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 3. Detailed information on calculations of environmental tracer data. Velocity profiling at the US Army Corps of Engineers Electric Dispersal Barrier in the Chicago Sanitary and Ship Canal during passage of fully loaded commercial tows: Barge Mounted Argonaut SW USGS Topo Map Vector Data (Vector) 862 Ames, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 24870 Landes, Illinois 20180625 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 42269 South Pekin, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for South Wayne, Wisconsin 20160516 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 47080 Wacker, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 48160 West Chicago, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 48189 West Frankfort, Illinois 20180625 for 7.5 x 7.5 minute FileGDB 10.1 USGS Combined Vector for Brodhead West, Wisconsin 20160516 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 5553 Broadwell, Illinois 20180625 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 31415 Nauvoo, Illinois 20180625 for 7.5 x 7.5 minute Shapefile USGS Combined Vector for Montpelier, Iowa 20160513 7.5 x 7.5 minute Shapefile 1989 Aquatic Areas - Upper Mississippi River System - Pool 20 1989 Aquatic Areas - Upper Mississippi River System - Lockport Pool Data for Radium Mobility and the Age of Groundwater in Public-drinking-water Supplies from the Cambrian-Ordovician Aquifer System, North-Central USA: Table 3. Detailed information on calculations of environmental tracer data. Total Thickness of Glacial Deposits Landsat Burned Area Essential Climate Variable products for the conterminous United States (1984 - 2015) USGS Small-scale Dataset - Congressional Districts of the United States - 110th Congress 200710 Shapefile USGS Small-scale Dataset - Congressional Districts of the United States - 112th Congress 201101 Shapefile