USGS Water-Year Summary 2024

04085108 EAST RIVER AT COUNTY HIGHWAY ZZ NEAR GREENLEAF, WI

LOCATION - Lat 44°22'19", long 88°05'32" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 sec.20, T.22 N., R.20 E., Brown County, WI, Hydrologic Unit 04030204, on left bank, downstream side of bridge on County Trunk ZZ, 4.0 mi north of Greenleaf.

DRAINAGE AREA - 44.8 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - January 2012 to current year.

GAGE - Water-stage recorder and Crest stage gage. Elevation of gage is 620 ft. above NAVD of 1988, from topographic map.

REMARKS - Records are considered good except for estimated discharges and discharges below 2 cfs, which are poor. For records status prior to October 1, 2013, see remarks printed in annual water-data reports. Gage-height telemeter at station.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - January 2012 to current year.

INSTRUMENTATION - Tipping bucket rain gage with electronic datalogger.

EXTREMES FOR PERIOD OF RECORD - Maximum daily rainfall, 2.32in., Aug 9, 2012.

EXTREMES FOR CURRENT YEAR - Maximum daily rainfall, 1.66in., 12/13/2015.

REMARKS - Calibration checks were made on 9/14/2016 and 04/25/2017. A Nova-Lynx rain gage calibrator (946 ml) with the smallest nozzle size was used to determine accuracy of the rain gage. Calibration takes approximately 40 minutes, with an expected rainfall amount of 1.15”, for an average rate of 1.7” per hour. The 9/14/2016 calibration check yielded 1.17" (1.1% high). The 04/25/2017 check yielded 1.18” (2.6% high). No data corrections were made. All calibrations were removed from the precipitation record. Snowfall/ice that melts in the funnel is interpreted as snow melt and is removed from the record and shown as estimated days. Those days interpreted as snow melt include December 5, 6, 7, 20, 24 and 25, January 10, February 12, 26 and 27, March 2, 4, 14, 15. December 25 and January 10 were a combination of rain and snowmelt. Air temperature and solar radiation from a weather station at GLRI site ESW3 and time lapse photos were used to determine snowmelt vs rainfall tips.

WATER-QUALITY RECORDS

PERIOD OF RECORD - January 2012 to current year.

PERIOD OF DAILY RECORD - Suspended Sediment Discharge(tons/day): January 2012 to current year. Chloride Discharge (tons/day): January 2012 to current year. Nitrate + Nitrite Discharge (lbs/day): January 2012 to current year. Ammonium Discharge (lbs/day): January 2012 to current year. Total Kjeldahl Nitrogen Discharge (lbs/day): January 2012 to current year. Orthophosphorus Discharge (lbs/day): January 2012 to current year. Total Phosphorus Discharge (lbs/day): January 2012 to current year.

INSTRUMENTATION - An automatic twenty four bottle peristaltic pump refrigerated sampler. YSI EXO2, SUNA V2 nitrate sensor and CycleP04 phosphate sensor all located within flow through chamber.

REMARKS - Chemical analyses are by the Wisconsin Water and Environmental Analysis Lab.

EXTREMES FOR PERIOD OF RECORD - --WATER TEMPERATURE: Maximum observed, 28.4°C, Aug. 14, 16, 2015; minimum observed, -0.1°C, Nov 26, 2014. SPECIFIC CONDUCTANCE: Maximum observed, 1330 uS/cm, Feb. 5, 2016; minimum observed, 114 uS/cm, Nov. 26, 2014. DISSOLVED OXYGEN: Maximum observed, 15.8 mg/L, Apr. 6-7, 2015; minimum observed, 0.0 mg/L, Aug. 19, 2014. pH: Maximum observed, 8.6 standard units, May 6, 2014; minimum observed, 7.1 standard units, May 25-26, 2015. TURBIDITY: Maximum observed, >1000 FNU, June 1, 2, 18, 2014; minimum observed, 1.6 FNU, Dec. 20-22, 2015. NITRATE: Maximum observed, 5.58 mg/L, Dec. 24, 2015, Jan. 15, 2016 and Jul. 19, 2016; minimum observed, 0.18 mg/L mid to late Oct. 2015.