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USGS 01304562 PECONIC RIVER AT COUNTY HWY 105 AT RIVERHEAD NY

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION.--Lat 40°55'04.0", long 72°38'19.2" referenced to North American Datum of 1983, Suffolk County, NY, Hydrologic Unit 02030202, at County Road 105 bridge, in Riverhead.
PERIOD OF RECORD.--August 2012 to current year.
GAGE.--Water-stage recorder. Datum of gage is NGVD of 1929.
REMARKS.--ELEVATION WY 2014: Records good, except those for Nov. 8 to June 27, Aug. 18-19, Sept. 6-13, which are fair, and Sept. 14-30, which are poor. Satellite elevation telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--Maximum elevation, 8.56 ft, Oct. 29, 2012; minimum elevation, -3.22 ft, Jan. 20, 2016.
EXTREMES OUTSIDE PERIOD OF RECORD.--Storm tide of Dec. 11, 1992, reached an elevation of 8.2 ft, from high-water mark at site 1.7 mi northeast.
PERIOD OF RECORD1.--August 2012 to current year. Sampling depth records for August 2012 to current year are unpublished and available in files of the Geological Survey.
PERIOD OF DAILY RECORD1.--
WATER TEMPERATURE: August 2012 to current year.
SALINITY: August 2012 to current year.
DISSOLVED OXYGEN: August 2012 to current year.
TURBIDITY: August 2012 to current year.
CHLOROPHYLL: August 2012 to current year.
NITRATE: August 2012 to current year.
INSTRUMENTATION1.--Water-quality monitor provides 6-minute-interval readings collected from 1.6 ft above bottom. Nitrate analyzer provides 30-minute-interval readings collected from 1.6 ft above bottom. Salinity record computed from specific-conductance readings.
REMARKS1.--Satellite telemeter for water temperature, specific conductance, dissolved oxygen, pH, turbidity, chlorophyll, nitrate, and sampling depth parameters at station. Interruptions of record were due to the malfunction of water-quality monitors or sensors.
WATER TEMPERATURE WY 2016: Records excellent.
SALINITY WY 2016: Records excellent.
DISSOLVED OXYGEN WY 2016: Records excellent, except those for Oct. 2-13, Oct. 31 to Nov. 24, Dec. 18 to Jan. 8, Jan. 17-25, Feb. 6, May 2-20, June 4-19, Aug. 9, 11, 17-20, Sept. 12-16, 18, 21-30, which are good, Jan. 26 to Feb. 5, June 20-25, July 1, Aug. 22-27, Sept. 1-2, which are fair, Feb. 7-14, June 26-30, July 2-11, 13-14, Aug. 28-31, Sept. 3-9, which are poor, and Feb. 15-25, July 12 which were deleted.
TURBIDITY WY 2016: Records excellent, except those for Oct. 26 to Nov. 24, Dec. 8-23, 26, 28, Jan. 8, Mar. 21 to Apr. 8, Aug. 11-14, Sept. 23-30, which are good, and Dec. 25, 27, Dec. 29 to Jan. 4, Jan. 7, which are fair,
CHLOROPHYLL WY 2016: Records excellent, except those for May 12 to June 1, June 4, 17-19, 21-22, Sept. 16-22 which are good, June 2-3, 5-13, 20, 24-25, 27, July 11, Sept. 23-29, which are fair, June 23, 26, 28-30, July 12-14, Sept. 30 which are poor, and July 1-2 which were deleted.
NITRATE WY 2016: Records excellent, except those for Oct. 1, 6, 9, May 4, 9-12, 14-15, 17, 20, June 1-2, July 17-18, 26-29, Aug. 28 to Sept. 1, which are good. Oct. 2-5, 7-8, 10, May 13, 16, 18-19, June 3-6, 10, July 30 to Aug 3, Aug. 5-6, 8, Sept.2-7, 9, which are fair, June 7-9, 11, Aug. 4, 7, 9-11, Sept. 8, which are poor, and Aug. 12 which was deleted.
EXTREMES FOR PERIOD OF RECORD1.--WATER TEMPERATURE: Maximum, 30.4 °C, July 18, 19, and 20, 2013; minimum, -1.3 °C, Feb. 10, 2013.
SALINITY: Maximum, 29 psu, Jan. 25, 2016; minimum, 15 psu, Feb. 25, 2016.
DISSOLVED OXYGEN: Maximum, 16.5 mg/L, Mar. 13, 2015; minimum, 0.1 mg/L, May 28 to June 4 2015.
TURBIDITY: Maximum, 630 FNU, Oct. 14, 2013; minimum, <0.1 FNU, many times throughout the year.
CHLOROPHYLL: Maximum, 500 ug/L, Sept. 29, 2012; minimum, <0.1 ug/L, Feb. 22, 2013.
NITRATE: Maximum, 1.4 mg/L, May 15, 2015, minimum, <0.01 mg/L, many times throughout the year.
1 Water-Quality Records

Peak Flow and Stage Information


Elevation observations and tidal predictions for this station are reported to NGVD 1929. To convert data to NAVD 1988 subtract 0.95 ft. To convert data to MHHW datum subtract 2.17 ft. To convert data to MLLW datum add 1.16 ft. These corrections vary from site to site.

NGVD 1929 is the National Geodetic Vertical Datum of 1929, formerly called "mean sea level" or "Sea Level Datum of 1929." NGVD 1929 was a general adjustment of the first-order level nets fit to mean sea level at 26 tide gages in the US and Canada.
NAVD 1988 is the North American Vertical Datum of 1988, which is a geodetic datum derived from a general adjustment of the first-order level nets fit to 1 tide gage in eastern Canada.
MHHW is mean higher high water, which is a site-specific datum determined by averaging the highest of the 2 high tides that occur each day over a 19-year tidal epoch. For tide gages with less than 19 years of record, this datum is estimated by correlation with long-term tide gages.
MLLW is mean lower low water, which is a site-specific datum determined by averaging the lowest of the 2 low tides that occur each day over a 19-year tidal epoch. For tide gages with less than 19 years of record, this datum is estimated by correlation with long-term tide gages.


Additional sensor graph(s) available (click on graph or sensor name)

Water elevation, astronomical-tide elevation, and residual water level

Water elevation, astronomical-tide elevation, and resid ual water level Graph updated every 15 minutes

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Gage PhotoStation image

 

This station managed by the NY Water Science Center Coram.

Available Parameters Available Period
All 12 Available Parameters for this site
  
00003 Sampling depth, monitor 2017-03-26  2017-07-21
00010 Temperature, water, monitor 2012-08-15  2017-07-21
00095 Specific cond at 25C, monitor 2012-08-14  2017-07-21
00300 Dissolved oxygen, monitor 2012-08-17  2017-07-21
00400 pH, monitor 2017-06-06  2017-07-21
62361 Chlorophyll, in situ, monitor 2012-08-15  2017-07-21
62619 Elevation, ocean/est 2012-08-15  2017-07-21
62619 Elevation, ocean/est, tidal prediction 2017-03-26  2017-09-30
63680 Turbidity, Form Neph, monitor 2012-08-15  2017-07-21
90860 Salinity, at 25C, monitor 2012-08-15  2017-07-21
99067 Observed elev diff 2017-03-26  2017-07-21
99137 Nitrate, in situ, nitrate analyzer 2012-09-07  2017-07-21

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Summary of all available data for this site
Instantaneous-data availability statement


Sampling depth, feet, monitor

Most recent instantaneous value: 8.97 07-21-2017   19:24 EST
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Temperature, water, degrees Celsius, monitor

Most recent instantaneous value: 28.7 07-21-2017   19:24 EST
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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius, monitor

Most recent instantaneous value: 41300 07-21-2017   19:24 EST
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Dissolved oxygen, water, unfiltered, milligrams per liter, monitor

Most recent instantaneous value: 5.0 07-21-2017   19:24 EST
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pH, water, unfiltered, field, standard units, monitor

Most recent instantaneous value: 7.6 07-21-2017   19:24 EST
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Chlorophyll, total, water, fluorometric, 650-700 nanometers, in situ sensor, micrograms per liter, monitor

Most recent instantaneous value: 3.8 07-21-2017   19:24 EST
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Estuary or ocean water surface elevation above NGVD 1929, feet

Most recent instantaneous value: 1.79 07-21-2017   19:30 EST
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Estuary or ocean water surface elevation above NGVD 1929, feet, tidal prediction

Most recent instantaneous value: -1.30 07-24-2017   05:48 EST
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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU), monitor

Most recent instantaneous value: 30.8 07-21-2017   19:24 EST
Graph of  Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

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Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius, monitor

Most recent instantaneous value: 26.4 07-21-2017   19:24 EST
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Difference between observed and predicted water surface elevation, feet

Most recent instantaneous value: 0.26 07-21-2017   19:30 EST
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Nitrate, water, in situ, milligrams per liter as nitrogen, nitrate analyzer

Most recent instantaneous value: 0.11 07-21-2017   19:30 EST
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