South Atlantic Water Science Center (SAWSC)

Data and Tools

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Real-time streamflow:     GA  ||  NC  ||  SC
Real-time water-quality data:    GA  ||  NC  ||  SC 
Real-time groundwater levels:    GA  ||  NC  ||  SC
Real-time precipitation:    GA  ||  NC  ||  SC

Filter Total Items: 171
Date published: October 14, 2019

Groundwater/Surface-Water Interactions Along Ellerbe Creek in Durham, North Carolina, 2016–18

A hydrologic study involving the investigation of groundwater-surface water interactions along Ellerbe Creek, a major tributary to upper Falls Lake, was conducted in order to determine if groundwater is a likely source of nitrate input to the stream. Groundwater-surface water interactions were characterized by synoptic streamflow measurements, groundwater-level monitoring, hydrograph-...

Date published: September 30, 2019

2015 Georgia water-use information by county and water-use trends by water-planning region

Water-withdrawal, water-use, and water-return information have been collected and compiled for each county in Georgia every 5 years since 1980 using data obtained from various Federal, State, private agencies, and on-line sources. For 2015, water use, water withdrawal, and water returns were estimated for each county in Georgia. Off-stream water use in 2015 is estimated for the categories of...

Date published: August 20, 2019

Land Use Land Cover for Selected Basins in Clarksburg, Montgomery County, MD

This dataset contains digitized land use/land cover (LULC) for the years 2011, 2015, and 2017. The dataset contains 1-meter resolution raster maps for each year covering the geographic area for six watersheds within and near the Clarksburg Special Protection Area located in Montgomery County, Maryland, USA. The area includes LULC within 500-foot buffered watersheds. Watershed boundaries for...

Date published: August 12, 2019

Concentrations of inorganic and organic analytes in a national reconnaissance of urban stormwater runoff to surface water and groundwater in the United States

This dataset contains results for samples collected at stormwater basins across the United States to assess the potential contaminant pathways of these basins to surface water and groundwater. Sample sites were in stormwater conveyance infrastructure that discharged mixed stormwater runoff from buildings, parking lots, roads, and other infrastructure in residential, commercial, and industrial...

Date published: June 19, 2019

SPARROW model datasets for total nitrogen and total phosphorus in North Carolina, including simulated stream loads

To better understand the influence of human activities and natural processes on surface-water quality, the U.S. Geological Survey (USGS) developed the SPARROW (SPAtially Referenced Regressions On Watershed attributes) (Schwarz and others, 2006; Alexander and others, 2008) model. The framework is used to relate water-quality monitoring data to sources and watershed characteristics that affect...

Date published: June 19, 2019

SPARROW model dataset for total suspended solids in North Carolina, including simulated stream loads

To better understand the influence of human activities and natural processes on surface-water quality, the U.S. Geological Survey (USGS) developed the SPARROW (SPAtially Referenced Regressions On Watershed attributes) (Schwarz and others, 2006; Alexander and others, 2008) model. The framework is used to relate water-quality monitoring data to sources and watershed characteristics that affect...

Date published: May 28, 2019

Porosity, dry bulk density, and mass accumulation rates

Porosity, dry bulk density, and average mass accumulation rates, and estimated date of the mid-point of each sediment interval were determined for ten sediment cores retrieved from Lake Lanier in 2018. Physical properties of the sediment (porosity, dry bulk density) were used to help define the pre-reservoir surface and determine the average mass accumulation rate of sediment. This will help...

Date published: May 28, 2019

Lake Lanier Carbon, Nitrogen, totals and stable isotopes

Total carbon and nitrogen concentrations, and delta carbon-13 and delta nitrogen-15 stable isotope ratios, were determined in sediment samples to potentially identify the sources of organic matter in the sediment and any post-depositional diagenetic alteration of the organic matter over time.

Date published: May 28, 2019

Lake Lanier Cesium-137

Specific activities of cesium-137 in picoCuries per gram were determined for selected samples from the Lake Lanier cores. The laboratory standard deviation and the sample-specific reporting levels are included for each sample.

Date published: May 28, 2019

Lake Lanier phosphorus and metals

This data set contains concentrations of phosphorus and 48 other elements determined on core samples collected in Lake Lanier.

Date published: May 27, 2019

Concentration of chemical constituents in lake sediments from selected coring locations on Lake Lanier, Georgia, May 2018

The data herein were collected in support of a larger study in Gwinnett County, GA on the possible impacts of on-site waste water treatment (septic systems) on Lake Lanier water quality. Until recently, a missing component in this assessment was the inclusion of historical sediment and associated nutrient accumulation data from the lake to place results in a broader context. To this end, the...

Date published: April 1, 2019

North Carolina (NC) Stochastic Empirical Loading and Dilution Model (SELDM) summary statistics for physical and chemical data at NC highway-runoff and bridge-deck sites

The purpose of this USGS data release is to publish NC SELDM streamflow statistics and summary statistics of physical and chemical data in support of the information provided in the above-referenced report. This data release consists of two data sets, "NC SELDM streamflow statistics..." and "NC SELDM summary statistics for physical and chemical data...". The tables that are uploaded for the "...