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Water-Year Summary for Site 11176090

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00060 Discharge(Mean)  
80155 Suspnd sedmnt disch(Mean)  
80225 Bedload sediment(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
11176090 ARROYO MOCHO A LIVERMORE CA
LOCATION - Lat 37°40'37", long 121°48'48" referenced to North American Datum of 1927, Alameda County, CA, Hydrologic Unit 18050004, in Valle de San Jose Grant, on left bank, 50 ft east of unamed road, 3.1 mi upsteram of confluence of Arroyo Las Positas, and 2.6 mi west of Livermore.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1983 to December 1985, November 2016 to May 1, 2022 (discontinued) (seasonal record October 1 to April 30).
COOPERATION - Since Nov. 30, 2016, discharge records collected by Alameda County Zone 7 Water Agency, under general supervision of the U.S. Geological Survey.
WATER-QUALITY RECORDS
PERIOD OF RECORD -

DISCRETE WATER-QUALITY DATA:
TOTAL LOAD SEASONAL PERIODIC: Water years December 2, 2016 to May 1, 2022 (storm season only).

CONTINUOUS WATER-QUALITY DATA:
SEDIMENT DATA: Water years December 1, 2016 to May 1, 2022 (storm season only).

REMARKS - Water Year 2017: Records Poor.  The practice of assigning qualitative accuracy ratings to water-quality data was discontinued in WY2017.
EXTREMES OUTSIDE PERIOD OF RECORD - SUSPENDED SEDIMENT.--Maximum monthly load, 23,200 tons, Feb. 2017. Minimum monthly load, 17.2 tons, Apr. 2017.