Hydrography Science Applications Lead
Email:
seterzio@usgs.gov
Office Phone:
919-818-5278
Fax:
919-571-4041
ORCID:
0000-0003-3559-5844
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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 the fate and transport of constituents to receiving surface-water bodies. The core of the model consists of using a nonlinear-regression equation to describe the non-conservative transport of contaminants from point and nonpoint sources on land to rivers, lakes and estuaries through the stream and river network. In North Carolina,...
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Alterations to stream hydrology, which include changes in stream geomorphology, are primary impacts of anthropogenic disruption. In North Carolina, hydrological alterations lead to environmental impacts through degraded ecosystems and water quality. In collaboration with the North Carolina Department of Environmental Quality, Division of Mitigation Services (DMS), the USGS South Atlantic Water Science Center datasets are proxy measurements of the extent of altered hydrology in riverine systems across the State of North Carolina. The datasets consist of an inventory and characterization of small scale (mostly agricultural) ponds and artificial drainages, which are both significant hydrologic modifications in the...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Aquatic ecosystem,
Barriers,
Freshwater ecosystems,
Geomorphology,
Geospatial analysis, All tags...
Hydrology,
Hydrology,
Land use & land cover,
North Carolina,
Small ponds,
Transportation,
USGS Science Data Catalog (SDC),
Water cycle,
Watershed management,
geoscientificInformation,
inlandWaters, Fewer tags
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Reactive nitrogen is transported from the atmosphere to the landscape as wet and dry deposition that contributes to annual nitrogen loads to the Chesapeake Bay. Estimates of atmospheric inorganic nitrogen deposition to the Chesapeake Bay watershed during 1950 to 2050 are presented, and are based on field measurements, model simulations, statistical relations, and surrogate constituents used for estimates. Wet atmospheric nitrogen deposition has generally been quantified from weekly precipitation sample collections, whereas dry atmospheric nitrogen deposition has been simulated by a model at an hourly time step.
Tags: Chesapeake,
Chesapeake Bay watershed,
Delaware,
District of Columbia,
Environmental Health, All tags...
Geochemistry,
Hydrology,
Land Use Change,
Lower Chesapeake Bay,
Maryland,
New York,
Pennsylvania,
USGS Science Data Catalog (SDC),
Upper Chesapeake Bay,
Virginia,
Water Quality,
West Virginia,
ammonia,
ammonium,
atmospheric and climatic processes,
atmospheric deposition (chemical & particulate),
atmospheric properties,
direct atmospheric deposition,
estuary,
inorganic,
nitrate,
nitric acid,
nitric oxide,
nitrogen,
oxides,
precipitation (atmospheric),
reduced,
water quality,
watershed,
watershed management, Fewer tags
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Note: this data release has been deprecated. Please see new data release here: https://doi.org/10.5066/P9IGSRCV. Artificial drainage has major ecosystem impacts through the development of extensive ditch networks that reduce storage and induce large-scale vegetation changes. This has been a widespread practice of water table management for agriculture in Eastern North Carolina. However, these features are challenging to identify because the structure has been determined by non-natural factors. A dataset of open ditches was processed by calculating terrain (also, positive) openness – a value based on a line-of-sight approach to measure the surrounding eight zenith angles as viewed above the landscape surface. The...
Tags: Agricultural,
Artificial drainage,
Beaufort,
Bertie,
Bladen, All tags...
Brunswick,
Camden,
Canals,
Carteret,
Chowan,
Columbus,
Craven,
Cumberland,
Currituck,
Dare,
Ditches,
Duplin,
Edgecombe,
Franklin,
Gates,
Greene,
Halifax,
Harnett,
Hertford,
Hoke,
Hyde,
Johnston,
Jones,
Lenoir,
Martin,
Montgomery,
Moore,
Nash,
New Hanover,
North Carolina,
Northampton,
Onslow,
Pamlico,
Pasquotank,
Pender,
Perquimans,
Pitt,
Richmond,
Robeson,
Sampson,
Scotland,
Tyrrell,
Wake,
Washington,
Wayne,
Wilson,
boundaries,
farming,
geoscientificInformation,
inlandWaters,
transportation, Fewer tags
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Slope-Area Index (SAI) is used to predict erosion along a stream channel. It is a function of channel slope, drainage area upstream raised to the exponent based on flood frequency of 2-year floods. The 0.60 coefficient was used for all the physiographic provinces other than Small Urban basins in the Piedmont
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