Hydrologic Technician
Email:
thoffman@usgs.gov
Office Phone:
518-285-5650
Fax:
518-285-5601
Location
District Office - Troy
425 Jordan Road
Troy
, NY
12180
US
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Study area Hudson River from Hyde Park to Yonkers, N.Y. Period of project Continuous since October 1991 Problem - The location of the salt front (freshwater-saltwater interface) in the lower Hudson River basin can affect wildlife habitats and freshwater withdrawals for municipal use. Knowing the location of the salt front can help managers make informed decisions to protect the environment, maintain drinking water standards, and issue health advisories pertaining to drinking water, if needed. Objectives - Estimate the location of the salt front (defined as 100mg/L chloride) in the lower Hudson River. Specifically, collect water-surface elevation, specific conductance, and water-temperature data at three gages...
Categories: Data,
Project;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Completed,
Cooperative Water Program,
Groundwater and Streamflow Information,
Groundwater and Streamflow Information,
Hudson River Estuary, All tags...
National Streamflow Information Program,
New York,
Saltwater Intrusion,
Saltwater Intrusion,
Saltwater intrusion,
Surface-Water Monitoring,
Surface-Water Monitoring,
Surface-Water Monitoring,
USGS New York Water Science Center,
WSC,
salt front, Fewer tags
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This child item model archive summary documents a surrogate regression model to estimate suspended-sediment concentration (SSC) at the Mohawk River above State Highway 30A at Fonda, New York. (U.S. Geological Survey station number 01349527). The methods used follow USGS guidance in relevant Office of Surface Water/Office of Water Quality Technical Memoranda and USGS Techniques and Methods, book 3, chap. 4 (Rasmussen and others, 2009). Thirty-nine concurrent measurements of SSC and turbidity, collected from June 12, 2015, through May 28, 2020, were used in the model calibration dataset. Samples were collected across 94 percent of the range in observed discharge and 24 percent of the range in observed turbidity during...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Mohawk River,
Montgomery County,
New York State,
Sediment,
Water Quality, All tags...
Water-Quailty Modeling,
datasets,
inlandWaters,
mathematical modeling,
real-time monitoring and reporting,
regression analysis,
sediment transport,
suspended material (water),
time series datasets,
water quality,
water sampling, Fewer tags
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These model archive summaries document surrogate regression models developed to estimate suspended-sediment concentration (SSC) at three USGS streamgages in New York: Mohawk River above State Highway 30A at Fonda, USGS site number 01349527; Schoharie Creek at Burtonsville, USGS site number 01351500; and Mohawk River at Cohoes, USGS site number 01357500. Ordinary least squares regression equations were developed between suspended-sediment concentration and turbidity using the U.S. Geological Survey Surrogate Analysis and Index Developer (SAID) Tool (Domanski and others, 2015) and methods described in Rasmussen and others (2009). Model summaries were developed following guidance in USGS Office of Surface Water...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Mohawk River,
New York State,
Schoharie Creek,
Sediment,
USGS Science Data Catalog (SDC), All tags...
Water Quality,
Water-Quailty Modeling,
datasets,
inlandWaters,
mathematical modeling,
real-time monitoring and reporting,
regression analysis,
sediment transport,
suspended material (water),
time series datasets,
water quality,
water sampling, Fewer tags
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This child item model archive summary documents a surrogate regression model to estimate suspended-sediment concentration (SSC) at the Mohawk River at Cohoes, New York. (U.S. Geological Survey station number 01357500). The methods used follow USGS guidance in relevant Office of Surface Water/Office of Water Quality Technical Memoranda and USGS Techniques and Methods, book 3, chap. C4 (Rasmussen and others, 2009). The model is composed of two ordinary least squares linear regression equations covering low and high values of turbidity. The low turbidity equation is based on forty-one concurrent measurements of SSC and turbidity collected from October 1, 2016, through August 28, 2020; the high turbidity equation is...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Mohawk River,
New York State,
Schenectady County,
Sediment,
Water Quality, All tags...
Water-Quailty Modeling,
datasets,
inlandWaters,
mathematical modeling,
real-time monitoring and reporting,
regression analysis,
sediment transport,
suspended material (water),
time series datasets,
water quality, Fewer tags
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This child item model archive summary documents a surrogate regression model to estimate suspended-sediment concentration (SSC) at the Schoharie Creek at Burtonsville, New York (U.S. Geological Survey station number 01351500). The methods used follow USGS guidance in relevant Office of Surface Water/Office of Water Quality Technical Memoranda and USGS Techniques and Methods, book 3, chap. 4 (Rasmussen and others, 2009). Sixty-one concurrent measurements of SSC and turbidity, collected from October 1, 2015, through May 2, 2020, were used in the model calibration dataset. Samples were collected across 75 percent of the range in observed discharge and 87 percent of the range in observed turbidity during the model calibration...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: New York State,
Schenectady County,
Schoharie Creek,
Sediment,
Water Quality, All tags...
Water-Quailty Modeling,
datasets,
inlandWaters,
mathematical modeling,
real-time monitoring and reporting,
regression analysis,
sediment transport,
suspended material (water),
time series datasets,
water quality,
water sampling, Fewer tags
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