USGS Water-Year Summary for Site 07288500

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	Available Parameters
	00010 Temperature, water(Mean)
	00060 Discharge(Mean)
	00065 Gage height(Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

07288500 BIG SUNFLOWER RIVER AT SUNFLOWER, MS

LOCATION - Lat 33°32'50", long 90°32'35" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 sec.06, T.19 N., R.3 W., Sunflower County, MS, Hydrologic Unit 08030207, Choctaw Meridian, near right bank on downstream side of highway bridge, 0.5 miles northwest of Sunflower, 2.5 miles downstream from Jones Bayou, and 19.0 miles upstream from Quiver River confluence.

DRAINAGE AREA - 767 mi².

REVISIONS HISTORY - WSP 1211: Drainage area. WDR Miss. 1970: 1969(M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1935 to September 30, 1980; October 2002 to current year. Prior to October 1938, monthly discharge only published in WSP 1311. February 1918 to September 1935 (gage heights only), October 1980 to September 1995 in reports of Corps of Engineers, Vicksburg district. Prior to October 1, 1972, published as Sunflower River at Sunflower, Miss. PERIOD OF DAILY RECORD WATER QUALITY.-- TURBIDITY: October 2009 to September 2010.

GAGE -

Water-stage recorder. Datum of gage is 92.03 ft above NAVD of 1988, (Reference Frame NAD_83 (2011) (EPOCH:2010.0000) GEOID18).

Prior to February 15, 2024, the datum of gage was 93 ft above NGVD of 1929 (levels by U. S. Army Corps of Engineers).

Prior to Nov. 28, 1934, nonrecording gage on upstream side of bridge at datum 93.00 ft (28.346 m). Nov. 28, 1934, to June 30, 1947, nonrecording gage on upstream side of bridge at present datum.

COOPERATION - U.S Army Corps of Engineers, Vicksburg District

REMARKS - Records good except estimated daily discharges, which are poor. Diversion for irrigation of about 5,000 acres and withdrawal of an average of about 6 ft³/s for industrial use above station. At times streamflow is augmented by irrigation water, which is pumped from wells. Satellite telemeter at station.

EXTREMES OUTSIDE PERIOD OF RECORD -

Minimum daily discharge = 8.9 cfs on October 15, 2006

EXTREMES FOR PERIOD OF RECORD -

Maximum reported gage height and discharge, 28.37 (daily mean) feet, local datum on Mar 18, 1973 with 15,000 cfs.

Maximum reported gage height, 28.04 feet, local datum on Jun 15, 2021

Minimum reported gage height, -1.03 feet, local datum on Oct 27, 2017

WATER-QUALITY RECORDS

PERIOD OF RECORD - October 2009 to current year.

PERIOD OF DAILY RECORD - October 2009 to September 2010 and Mar 10, 2022 to current

COOPERATION - Mississippi Department of Environmental Quality (MDEQ)

INSTRUMENTATION - Water-quality monitor October 2009 - September 2010, and Mar 10, 2022 to current.

EXTREMES FOR PERIOD OF RECORD -

Highest reported SW temperature, 36.14 deg C on Aug 04, 2011

Lowest reported SW temperature, 0.01 deg C on Jan 10-11, 2010

Highest reported Specific Conductance (at 25 deg C) , 899 micro-siemens on Feb 23, 2022

Lowest reported Specific Conductance (at 25 deg C), 28 micro-siemens on Nov 12, 2010

Highest reported pH , 8.6 log units on Feb 17, 2022

Lowest reported pH , 6.6 log units on Apr 17-20, 2022

Highest reported DO (Dissolved Oxygen), 9.7 mg/L on Mar 12-15, 2022

Lowest reported DO (Dissolved Oxygen), 4.8 mg/L on Apr 20 and 22, 2022

Highest reported Turbidity, 990 FNU on Apr 26, 2010

Lowest reported Turbidity, 17 FNU on Jul 24-26, 2010