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Water-Year Summary for Site 08188800

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Available Parameters
00060 Discharge(Max.,Min.,Mean)  
00065 Gage height(Max.)  
00065 Gage height(Max.,Min.,Mean)  

Water year 2020: 2020-10-01 to 2021-09-30

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USGS Water-Year Summary 2020
08188800 Guadalupe River near Tivoli, TX
LOCATION - Lat 28°30'20", long 96°53'04" referenced to North American Datum of 1927, Refugio County, TX, Hydrologic Unit 12100204, on right bank at diversion and saltwater barrier, one orifice located upstream and one downstream, 550 ft downstream from Calhoun County Irrigation Canal intake, 0.4 mi downstream from San Antonio River, 3.5 mi north of Tivoli, and at mile 10.2.
DRAINAGE AREA - 10,128 mi².
REVISIONS HISTORY - WRD TX-68-1: Drainage area.
PERIOD OF RECORD - Sept. 1965 to current year (daily maximum stage), Aug. 2000 to current year (daily mean discharges less than 3,250 ft³/s). PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: Nov. 1965 to Aug. 1999. BIOCHEMICAL DATA: Nov. 1965 to Sept. 1996. PESTICIDE DATA: Oct. 1970 to Aug. 1999. RADIOCHEMICAL DATA: Feb. to May 1981 PERIOD OF DAILY RECORD, Water-Quality.-- SPECIFIC CONDUCTANCE: Oct. 1965 to Oct. 1982. WATER TEMPERATURE: Oct. 1965 to Oct. 1982.
GAGE - Water-stage recorder. Datum of gage is 0.04 ft above NGVD of 1929. Satellite telemeter at station.
REMARKS - Since installation of gage in Sept. 1965, at least 10% of contributing drainage area has been regulated. Many small diversions above station. Some records listed in the "Period of Record" for surface water and water quality may not be available electronically. Development of latest velocity rating enhances the accuracy of the record for the water year.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in July 1936 reached a stage of 11 ft, present site and datum. Maximum stage since at least 1936, that of Oct. 21, 1998. Levees along the Navigation Canal from San Antonio Bay to Victoria were built in 1961, thus decreasing the flood plain.
EXTREMES FOR PERIOD OF RECORD - Maximum gage height (upstream from barrier), 14.8 ft, Oct. 21, 1998. Maximum gage height (downstream from barrier), 14.7 ft, Oct. 21, 1998.