All Data

Water velocities were measured along the Illinois and Des Plaines Rivers using a Teledyne Rio Grande 1200 kHz acoustic Doppler current profiler (ADCP). ADCP data were collected in reciprocal pairs along crosssections and along approximately streamwise-oriented lines between crosssections at the following locations: (1) the Dresden Island Pool of the Des Plaines River on May 14, 2013 and July 3

Streamflow and phosphorus concentrations were monitored in the Assabet River in central Massachusetts in order to evaluate concentrations and loads in the river before, during, and after changes in the amount of total phosphorus that was discharged to the river from three wastewater-treatment plants. At four locations the U.S. Geological Survey collected weekly flow-proportional, composite samples

Water velocities were measured in the Calumet Harbor for 5 dates in 2015 and 2016 using Teledyne Rio Grande 600 kHz acoustic Doppler current profilers (ADCP). The data were georeferenced with differential GPS receivers with submeter accuracy. These velocity data were collected in cooperation with the US Army Corps of Engineers-Chicago District. ADCP data were collected on the following dates:

On August 31, 2015, USGS Illinois Water Science Center staff deployed a 2000 kHz side-looking acoustic Doppler velocity meter (ADVM) in the Chicago Sanitary and Ship Canal (CSSC) at the Electric Dispersal Barrier System (EDBS). These data were collected as a fully loaded commercial barge tow traversed the EDBS and passed the ADVM three times, and as several smaller vessels and an unloaded barge to

This data set includes data from three waterfowl species (northern pintail, American wdgeon, lesser scaup, green-winged teal and mallard) that were captured in Interior Alaska in 2010, then measured and sampled for blood parasite and avian influenza infections.

From February 12 to March 8, 1981, EG and G Geometrics conducted an aeromagnetic survey in Montana for Anaconda Copper Company. A Piper Navajo aircraft was used to conducted the survey. The survey was flown along north-south flightlines spaced 660 feet at a nominal height of 450 feet above the terrain. Five uniformly spaced east-west tie-lines were also flown. During processing, the International

Galvanic corrosion of lead in water distribution systems can occur when lead pipe or lead solder is in contact with a dissimilar metal such as copper. If the source water entering those systems has a relatively elevated chloride-to-sulfate mass ratio (CSMR), the potential for galvanic corrosion to occur is elevated (Gregory 1985; Edwards and Triantafyllidou, 2007), especially in water with low val

This dataset provides an additional "Grazing Potential" land use class to the already-published USGS NAWQA Wall-to-wall Anthropogenic Land-use Trends (NWALT) product (Falcone, 2015, USGS Data Series 948). As with the NWALT, the dataset consists of five national 60-m land use grids, for the years 1974, 1982, 1992, 2002, 2012. The only change to the dataset is, for every year, some pixels which a

ArcGIS web mapping service created for the Pacific walrus coastal haulout database for NOAA's use. We summarize available information on Pacific walrus haulouts from available reports, interviews with coastal residents and aviators, and personal observations of the authors. We provide this in the form of a georeferenced database that may be queried and displayed with standard geographic informatio

We summarize Pacific walrus coastal haulout locations reported in published papers, reports, and personal communications from 1893 through 2014. We report haulout locations based on available reports, as well as the authors? personal knowledge of specific haulout locations and publicly available geo-referenced imagery (Digital Globe, Longmont, Colorado, USA) viewed through a virtual digital globe

Springs and sinkholes in the Ozark Plateaus Physiographic Province (Ozarks) in Arkansas were digitized from 1:24,000 scale topographic maps to produce a digital dataset of karst features. Karst landscapes generally are created from bedrock dissolution that results in distinctive landforms, including sinkholes, springs, caves, and sinking streams, and a high degree of interaction between surface wa

This map is a digital map of the thickness of the surficial unconfined aquifer and was produced to improve understanding of the hydrologic system and the potential for transport of soluble nutrients and other chemicals from groundwater to streams in the Maryland and Delaware portions of the Delmarva Peninsula. The map is intended to be used in conjunction with other environmental coverages (such