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This dataset contains base-flow recession time constant (tau) contours that are interpreted from tau values calculated at streamgages in the Niobrara National Scenic River study area. The contours were created by interpolating the calculated tau values using geostatistical kriging methods. Kriging is a geostatistical method that can be used to determine optimal weights for measurements at sampled locations (streamgages) for the estimation of values at unsampled locations (ungaged sites). The kriged tau map could be used (1) as the basis for identifying areas with different hydrologic responsiveness, and (2) in the development of regional low-flow regression equations. The Geostatistical Analyst tools in ArcGIS Pro...
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In cooperation with the South Carolina Department of Transportation (SCDOT), the U.S. Geological Survey prepared geospatial layers illustrating the boundaries of the regions used in the South Carolina (SC) Stream Hydrograph Methods presented in Bohman (1990,1992). The region limits were described in written text and depicted in figures in Bohman (1990, 1992), but have not been provided as geospatial layers (due to the age of the original publications). This project used best-available geospatial data from the U.S. Environmental Protection Agency (USEPA) ecoregions (2013) to create equivalent geospatial representations of the Bohman (1990, 1992) region boundaries for the SC Stream Hydrograph Methods. These layers...
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The base-flow recession time constant (tau) is a hydrologic index that characterizes the ability of a ground-water system to supply flow to a stream draining from that system. The magnitude of tau indicates the degree of hydraulic conductivity of the stream to the groundwater system. Larger tau values indicate a stronger dependence on the groundwater system for streamflows, a smaller base-flow recession value indicates that the stream is not as dependent on the groundwater system for streamflows. Tau and other correlated hydrologic indices have been used as explanatory variables to greatly improve the predictive power of low-flow regression equations. Tau can also be used as an indicator of streamflow dependence...
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Infiltrometers are devices used to measure the infiltration rates of water into soils or porous media (Bouwer, 1986). Cylinder infiltrometers are generally constructed from metal shaped into cylinders which are driven into the ground and flooded with water. The rate at which water infiltrates into the ground is measured until the rate of infiltration is constant to capture unsaturated infiltration rates and beyond steady state to measure saturated infiltration rates and conductivity (Bouwer, 1986). Infiltrometers are typically employed to measure the rate of infiltration on inundated soils such as surface irrigation, seepage from surface water such as streams or reservoirs, or infiltration basins for groundwater...
This dataset consists of seven geomorphic variables attributed to standard river mile address points at 0.1 mile (160 m) intervals between Fort Peck Dam and the headwaters of Lake Sakakawea. The data illustrate the geomorphic variation in this 300-km segment of the Upper Missouri River and are indicative of channel complexity, thought to be an important influence on dispersal and retention of larval sturgeon.
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Metadata created by USGS staff. Data downloaded from USGS WaterWatch (http://water.usgs.gov/waterwatch) 5/13/08. These data represent the locations of USGS streamgages. Please note: data tagged in the attributes represents conditions from the day the data was downloaded. See hyperlinked URL in attributes for current conditions at a streamgage. Original File Name: realstx The "Real-time streamflow" map tracks short-term changes (over several hours) in rivers and streams. Although the general appearance of the map changes very little from one hour to the next, individual sites may change rapidly in response to major rain events or to reservoir releases.
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Estimates of various low-flow statistics were computed at 66 ungaged stream locations throughout New Jersey during the 2021 water year using methods in the published reports, 1) Streamflow characteristics and trends in New Jersey, water years 1897-2003 (Watson and others, 2005) and 2) Implementation of MOVE.1, censored MOVE.1, and piecewise MOVE.1 low-flow regressions with applications at partial-record streamgaging stations in New Jersey (Colarullo and others, 2018). The estimates are computed as needed for use in water resources permitting, assessment, and management by the New Jersey Department of Environmental Protection. The data release includes the stream name, location, drainage area, method of estimation,...
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Reliable estimates of the magnitude and frequency of floods are an important part of the framework for hydraulic-structure design and flood-plain management. Annual peak flows measured at U.S. Geological Survey streamgages are used to compute flood-frequency estimates at those streamgages. However, flood-frequency estimates also are needed at ungaged stream locations. A process known as regionalization was used to develop regression equations to estimate the magnitude and frequency of floods at ungaged locations. This dataset contains the supporting tables and updated hydrologic region boundaries used in the 2017 flood-frequency study for Georgia, South Carolina, and North Carolina.
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Estimates of various low-flow statistics were computed at 32 ungaged stream locations throughout New Jersey during the 2020 water year using methods in the published reports, 1) Streamflow characteristics and trends in New Jersey, water years 1897-2003 (Watson and others, 2005) and 2) Implementation of MOVE.1, censored MOVE.1, and piecewise MOVE.1 low-flow regressions with applications at partial-record streamgaging stations in New Jersey (Colarullo and others, 2018). The estimates are computed as needed for use in water resources permitting, assessment, and management by the New Jersey Department of Environmental Protection. The data release includes the stream name, location, method of estimation, drainage area,...
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Streambed instruments that measure electrical resistivity were constructed and installed along the main channel in San Antonio Creek and along tributary streambeds in order to provide insight into intermittent streamflow not recorded by traditional stream gaging stations. These instruments can record high-resolution temporal and geographic responses of streamflow to precipitation in intermittent streams. Streambed electrical resistivity sensors (SERS) and stream temperature, intermittency, and conductivity sensors (STICs) are small, cost-effective, instruments that can be installed (and re-installed) along stream reaches to measure stream intermittency. These instruments employ water contact electrodes to record...
    map background search result map search result map U.S. Geological Survey Streamgage Locations in Wyoming (2008) Base-flow recession time constant (tau) contours in the Niobrara National Scenic River in Nebraska, 2016-18 Calculated base-flow recession time constants at streamgages in the Niobrara National Scenic River in Nebraska, 2016-18 Infiltrometer data, San Antonio Creek Valley watershed, Santa Barbara County, California, 2017 Streambed electrical resistivity instruments, San Antonio Creek Valley watershed, Santa Barbara County, California, 2015–2019 Estimated low-flow statistics at ungaged stream locations in New Jersey, water year 2020 Magnitude and Frequency of Floods for Rural Streams in Georgia, South Carolina, and North Carolina, 2017-Data Region Layers for USGS South Carolina Bohman Method Hydrograph in StreamStats Estimated low-flow statistics at ungaged stream locations in New Jersey, water year 2021 Calculated base-flow recession time constants at streamgages in the Niobrara National Scenic River in Nebraska, 2016-18 Base-flow recession time constant (tau) contours in the Niobrara National Scenic River in Nebraska, 2016-18 Estimated low-flow statistics at ungaged stream locations in New Jersey, water year 2021 Estimated low-flow statistics at ungaged stream locations in New Jersey, water year 2020 Region Layers for USGS South Carolina Bohman Method Hydrograph in StreamStats Magnitude and Frequency of Floods for Rural Streams in Georgia, South Carolina, and North Carolina, 2017-Data U.S. Geological Survey Streamgage Locations in Wyoming (2008)