02253800 INDIAN RIVER LAGOON AT SEWALLS PT STUART FL

LOCATION.--Lat 27° 12' 19", long 80° 11' 38", Martin County, Hydrologic Unit 03090202 middle of Indian River Bridge cat walk,1.6 mi west of Atlantic Ocean, 4 mi southeast of Start.

DRAINAGE AREA.--Indeterminate.

PERIOD OF RECORD.--
	DISCHARGE: August 1997 to September 2000. 
	GAGE HEIGHT: August 1997 to October 2000, September 2001 to current year. 
	SALINITY (TOP, BOTTOM): August 1997 to October 2000, September 2001 to current year.
	WATER TEMPERATURE (TOP, BOTTOM): August 1997 to October 2000, September 2001 to current year.

INSTRUMENTATION.--Satellite data collection platform with water-stage shaft encoder and water-quality monitor.  Prior to October 1, 2000, an acoustic Doppler velocity meter. Datum of gage is National Geodetic Vertical Datum of 1929.

REMARKS.--Salinity (top) rated excellent except for the following periods: Oct. 17-26, Nov. 1-2, Dec 2-Dec 12, Feb 10-Feb. 15, Mar. 1-5, Apr. 20-May 4, 15, Aug. 21-29, Sept 3-13 rated good; Oct 27-29, Nov. 3, Dec 13-19, Feb. 16-17, Mar. 6-8, May 5-7, 20-21, Sept. 14-20 rated fair; Dec. 20-27, Feb. 18-25, Mar. 9-19, May 22-June 17, 19-21, Sept. 21-24.  Salinity (bottom) rated excellent except for the following periods: Oct 1-3, 29, Nov. 4-15, Dec. 1-8, Jan. 20-30, Feb. 12-26, Mar. 1-3, 28-Apr. 21, May 30-June 17, July 11-24, Sept. 6-22 rated good; Oct. 4-6, Nov. 16-24, Dec. 9-14, Mar. 4-6, Apr. 22-May 8, June 18-23, Sept. 23-25 rated fair; Oct. 7-28, Nov. 25-27, Dec. 15-27, Mar. 7-14, 21-22, June 24-26 rated poor. Temperature (top and bottom) rated excellent. Elevation of the top salinity-temperature probe -1.0 ft NGVD, bottom salinity-temperature probe -9.5 ft NGVD.

EXTREMES FOR PERIOD OF RECORD.--
	DISCHARGE: Maximum discharge,  46,121 ft3/s Nov. 5, 1998;  minimum, -42,188 ft3/s Dec. 24, 1999.     
	GAGE HEIGHT: Maximum gage height 3.84 ft Sept. 15, 1999;   minimum, -1.83 ft Jan. 27, 1998.
	SALINITY (TOP): Maximum recorded, 37.8 mg/L Mar. 28, 1999 but may have been higher during period of missing record; minimum recorded, 8.0 mg/L Oct. 19, 1999, but may have been lower during period of missing record.
	SALINITY (BOTTOM): Maximum recorded, 37.7 mg/L Apr. 19, 1999 but may have been higher during period of missing record; minimum recorded, 13.2 mg/L Mar. 26, 1998, but may have been lower during period of missing record.
	WATER TEMPERATURE (TOP): Maximum recorded, 33.3°C,  Aug. 2, 1998, but may have been higher during period of missing record; minimum recorded, 12.4 degrees C, Jan. 27, 2000, but may have been lower during periods of missing record.
	WATER TEMPERATURE (BOTTOM): Maximum recorded, 32.8°C, Aug. 2, 1998, but may have been higher during period of missing record; minimum recorded, 12.3°C,  Jan. 27. 2000, but may have been lower during periods of missing record.

EXTREMES FOR CURRENT YEAR.--
	GAGE HEIGHT: Maximum gage height, 2.83 ft Nov. 16; minimum,  -1.13 ft Jan. 26.
	SALINITY (TOP): Maximum recorded, 36 mg/L Feb. 20, but may have been higher during period of missing record; minimum recorded, 20 mg/L July 11, but may have been lower during period of missing record.
	SALINITY (BOTTOM): Maximum recorded, 38 mg/L Sept. 22, but may have been higher during period of missing record; minimum recorded, 21 mg/L Nov. 8, but may have been lower during period of missing record. 
	WATER TEMPERATURE (TOP): Maximum recorded, 32.7°C, Aug. 20, but may have been higher during period of missing record: minimum recorded, 9.7°C, Jan. 10, but may have been lower during periods of missing record.
	WATER TEMPERATURE (BOTTOM): Maximum recorded, 32.2°C, Aug. 19, but may have been higher during period of missing record: minimum recorded, 12.9°C, Jan. 9, but may have been lower during periods of missing record.