USGS Water-Year Summary for Site USGS 11128500

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Med.)
	00060 Discharge(Mean)
	00095 Specific cond at 25C(Max.,Min.,Med.)
	00300 Dissolved oxygen(Max.,Min.,Med.)

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

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USGS Water-Year Summary 2023

11128500 Santa Ynez River at Solvang, CA

LOCATION - Lat 34°35'06", long 120°08'37" referenced to North American Datum of 1927, Santa Barbara County, CA, Hydrologic Unit 18060010, in San Carlos de Jonata Grant, on left bank bluff, 10 ft downstream from Alisal Road Bridge, 1 mi south of Highway 246 junction with Alisal Road in Solvang, and 10 mi downstream from Lake Cachuma.

DRAINAGE AREA - 579 mi².

REVISIONS HISTORY - WSP 2128: Drainage area. Temperature for the period Dec. 4, 2017, to Sep. 2, 2020, were revised on Sep. 24, 2021, based on edits to the temperature time series.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1928 to November 1936, June 1937 to November 1940 (irrigation seasons only), October 1946 to September 1999, July 2002 to current year.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 357.43 ft above NGVD of 1929. Various datums used during period of record. July 29 to Sept. 30, 1953, auxiliary water-stage recorder 750 ft upstream at different datum. Oct. 1, 1953, to Sept. 30, 1968, water-stage recorder at datum 7.00 ft higher. Oct. 1, 1968, to Sept. 30, 1988, water-stage recorder at datum 10.00 ft higher. Oct. 1, 1988, to Aug. 6, 1998, water-stage recorder at datum 5.00 ft. higher. July 12, 2002 to Sept. 30, 2003, supplemental gage 0.2 mi downstream at different datum.

REMARKS - Flow regulated by Jameson Lake, Gibraltar Reservoir, and since November 1952, by Lake Cachuma (stations 11121000, 11122000, and 11125500, respectively). Additional water may be added by releases from Alisal Reservoir (station 11128300). Water diverted out of basin from Jameson Lake, Gibraltar Reservoir, and Lake Cachuma to cities of Montecito, Santa Barbara, and Goleta for municipal supply. Water for irrigation pumped from wells along banks of river in valley upstream. See schematic diagram of Santa Ynez River Basin available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - (water years 1928-36, 1946-99, 2002 to current year) Maximum discharge, 82,000 ft³/s, Jan. 25, 1969, estimated, on basis of discharge measurements up to 81,000 ft³/s for Santa Ynez River near Buellton, gage height, 17.1 ft, from floodmark; no flow for several months in many years.

WATER-QUALITY RECORDS

PERIOD OF RECORD -

DISCRETE WATER-QUALITY DATA:
CHEMICAL DATA: Water years 1997 to current year.

CONTINUOUS WATER-QUALITY DATA:
DISSOLVED OXYGEN: Water years July 2002 to current year.
SPECIFIC CONDUCTANCE: Water years August 1997 to September 1997, April 1999 to current year.
WATER TEMPERATURE: Water years August 1997 to current year.