Hudson River Salt Front Data
Tide stage, specific conductance, water temperature, and freshwater inflow at selected Hudson River (New York) gages updated every 4-hours. Water temperature and specific conductance are measured at a depth of 10 feet below NGVD 1929 (mean sea level). These data include PROVISIONAL DATA subject to revision.
This information is made possible by funding from the U.S. Geological Survey Cooperative Water Program and the New York City Department of Environmental Protection, New York State Department of Environmental Conservation, New York State Department of Health, Hudson Valley Regional Council (representing Dutchess, Orange, Putnam, Rockland, Ulster, and Westchester Counties), and the Hudson River-Black River Regulating District.
| Estuary Conditions |
Streamflows |
Forecasts |
Historical Events |
Project Description and Reports |
Hudson River Salt-Front Report April 1 through September 30, 2007
- Location of the Hudson River salt front (map, table, tab delimitted). The salt front is defined as 100 mg/L chloride concentration.
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Current conditions table for all USGS Hudson River salt-front gages
- Gage at The Battery, New York City (NOAA/NOS/CO-OPS water level station):
- Gage at Hastings-on-Hudson:
- Gage at Congers (discontinued July 2001)
- Gage at Tomkins Cove (discontinued July 2001):
- Gage at West Pt. South Dock:
- Gage below Poughkeepsie:
- Gage at Albany:
- TABLE
of Daily Values at selected USGS gages
- Streamflow gages (15-minute discharge plots; default period 7 days; 31 days on-line) at:
- Great Sacandaga Lake at Conklingville, NY (Stn# 01323500):
- Summer 2002 Drought
- Summer 1995 Drought
- Hudson River Salt Front Delineations:
- Hudson River Specific Conductance and Tributary Inflow:
- Historical monthly freshwater flow data for Hudson River at:
To view and print the postscript (.ps) files from your browser, download, (free), the GSview utility.
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Project description of USGS Hudson River Salt Front Study
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Map of study area showing gage locations for USGS Hudson River Salt Front Study
(hsfmap1.gif 20k,
hsfmap1.ps 164k)
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Report titled "Salt-Front Movement in the Hudson River Estuary, New York--Simulations by One-Dimensional Flow and Solute-Transport Models" by
M. Peter de Vries and Lawrence A. Weiss
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Conference paper titled "Flow and Chloride Transport in the Tidal Hudson River, NY" by
Lawrence A. Weiss, Raymond W. Schaffranek, and M. Peter de Vries
(hudrpt16.pdf 77k)
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Conversion chart showing relation between specific conductance and chlorides in the lower
Hudson River (spcn2cl.gif 26k,
spcn2cl.ps 482k)
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Bathymetry data from report "Cross Sections of the Hudson River Estuary from Troy to New York City, New York" by David A. Stedfast --
CGAP data file description,
CGAP data file for river mile 21 to 49 (Hastings-on-Hudson to West Point),
CGAP data file for river mile 51 to 153 (West Point to Troy).
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Photograph of Hudson River looking north toward Bear Mtn. Bridge (located on
map at point where Putnam,
Rockland, and Westchester Counties meet) and West Point. In foreground is Doodletown Bight and
Salisbury Meadow; Iona Island is at right
(hudriver.gif 39k).
IE browsers only-->Other photographs include commercial ship traffic, tidal wetland across from West Point, aerial view of Croton Point, salt-front monitoring gages, meteorologic, specific conductance and tide-stage measuring equipment, leveling in gages to a common datum,
acoustic Doppler current profiling equipment (ADCP) used for discharge measurements, and ADCP current profiles showing bi-directional flow in a Hudson River cross-section.
U.S. Department of the Interior, U.S. Geological Survey
Maintainer: New York District
URL: http://ny.water.usgs.gov/projects/dialer_plots/saltfront.html
Last update: 12:51:45 Monday 21 April 2008
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