Warning: Javascript must be enabled to use all the features on this page!

Page Loading - Please Wait...

* We've detected you're using a mobile device. Find our Next Generation Station Page here.
Click to hideNews Bulletins

Water-Year Summary for Site 11047300

Click to hide Water-Year Summary instructions and information
  • 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)  

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

Print this page
USGS Water-Year Summary 2022
11047300 Arroyo Trabuco at San Juan Capistrano, CA
LOCATION - Lat 33°29'54", long 117°39'54" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 sec.01, T.8 S., R.8 W., Orange County, CA, Hydrologic Unit 18070301, on left bank, 30 ft downstream from Del Obispo Street Bridge, in San Juan Capistrano.
DRAINAGE AREA - 54.1 mi².
PERIOD OF RECORD - October 1972 to September 1977, October 1983 to September 1989, October 1995 to current year. WATER TEMPERATURE: Water years 1971-77, 1984. SEDIMENT DATA: Water Years 1971-77, 1984-93.
GAGE - Water-stage recorder, crest-stage gage, and concrete control. Elevation of gage is 80 ft above NGVD of 1929, from topographic map.
REMARKS - No regulation or diversion upstream from station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 10,000 ft³/s, Feb. 23, 1998, gage height, 19.81 ft, from rating curve extended above 1,600 ft³/s; no flow at times in some years.