Water-Data Report 2013 11073360 Chino Creek at Schaefer Avenue, near Chino, CA Basin

LOCATION.--Lat 34°00′14″, long 117°43′34″ referenced to North American Datum of 1927, San Bernardino County, CA, Hydrologic Unit 18070203, in Santa Ana del Chino Grant, on right bank, 300 ft downstream from old Schaefer Avenue Bridge, 0.8 mi downstream from San Antonio Creek, and 1.5 mi southwest of Chino. DRAINAGE AREA.--48.9 mi².

SURFACE-WATER RECORDS PERIOD OF RECORD.--October 1969 to current year. CHEMICAL DATA: Water year 1998. SEDIMENT DATA: Water year 1998. REVISED RECORDS.--WDR CA-84-1: 1983 (instantaneous maximum discharge). WDR CA-95-1: 1992, 1993. GAGE.--Water-stage recorder and concrete-lined flood-control channel. Concrete dikes formed low-water control from October 1975 to Apr. 16, 1991. Elevation of gage is 685 ft above NGVD of 1929, from topographic map. REMARKS.--Records rated good. Since 1997, due to construction in area of gage, Schaefer Avenue no longer extends to the Chino Creek crossing. The Schaefer Avenue Bridge, however, remains. Flow mostly regulated by San Antonio Flood-Control Reservoir, capacity, 7,700 acre-ft. Natural streamflow affected by extensive ground-water withdrawals, diversions for power, domestic use, irrigation, and return flow from irrigated areas. Releases of imported water are made to the basin by the Water Project at times in some years, via San Antonio Creek from Rialto Pipeline below San Antonio Dam, at a site approximately 11 mi upstream. During the current year, there were no reported releases from the California Water Project into the basin. See schematic diagram of Santa Ana River Basin available from the California Water Science Center. EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 12,700 ft³/s, Feb. 27, 1983, gage height, 10.32 ft, from rating curve extended above 560 ft³/s, on basis of slope-conveyance study; no flow May 21, June 30, July 1, Oct. 30, Nov. 3, 1977. EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Jan. 25, 1969, reached a stage of 9.23 ft, present datum, discharge, 9,200 ft³/s, on basis of contracted- opening measurement at site 6.1 mi downstream.

U.S. Department of the Interior Suggested citation: U.S. Geological Survey, 2014, Water-resources data for the United States, Water U.S. Geological Survey Year 2013: U.S. Geological Survey Water-Data Report WDR-US-2013, site 11073360, accessed at http://wdr.water.usgs.gov/wy2013/pdfs/11073360.2013.pdf Water-Data Report 2013 11073360 Chino Creek at Schaefer Avenue, near Chino, CA—Continued

DISCHARGE, CUBIC FEET PER SECOND WATER YEAR OCTOBER 2012 TO SEPTEMBER 2013 DAILY MEAN VALUES [e, estimated] Day Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

1 0.37 0.26 0.51 0.23 0.28 1.0 0.36 0.36 0.48 0.33 0.38 0.46 2 0.40 0.31 8.8 0.22 0.32 0.69 0.37 0.39 0.66 0.37 0.36 0.68 3 0.35 0.28 54 0.20 0.35 0.53 0.37 0.42 0.52 0.40 0.39 0.45 4 0.35 0.28 0.42 0.20 0.29 0.51 0.36 0.35 0.44 0.36 0.32 0.40 5 0.37 0.30 0.29 0.19 0.27 0.40 0.32 0.35 0.50 0.38 0.33 0.41 6 0.37 0.29 0.25 0.56 0.29 0.41 0.31 30 0.37 0.35 0.36 0.39 7 0.40 0.29 0.27 0.28 0.27 1.9 0.31 1.9 0.43 0.31 0.34 0.39 8 0.34 4.9 0.26 0.30 10 89 0.32 0.35 0.36 0.32 0.37 0.33 9 0.35 3.7 0.20 0.23 0.43 4.2 0.33 0.32 0.35 0.35 0.32 1.6 10 0.38 0.28 0.20 0.83 0.25 0.73 e0.32 0.33 0.40 0.32 0.36 0.80 11 49 0.19 0.21 0.20 0.23 1.1 e0.30 0.36 0.39 0.36 0.34 0.76 12 0.52 0.23 0.29 0.20 0.22 1.2 0.28 0.34 0.41 0.36 0.38 0.73 13 0.33 11 101 0.20 0.24 0.73 0.28 0.36 0.37 0.36 0.42 0.55 14 0.33 34 0.33 0.22 0.28 0.52 0.27 0.30 0.38 0.35 0.45 0.34 15 0.38 33 2.4 0.24 0.32 0.54 0.37 0.35 0.30 0.42 0.47 0.32 16 0.38 20 0.33 0.22 0.32 0.43 0.31 0.35 0.30 0.39 0.48 0.38 17 0.37 10 0.40 0.22 0.30 0.38 0.34 0.36 0.32 0.37 0.48 0.43 18 0.36 1.1 23 0.22 0.39 0.36 0.30 0.39 0.33 0.35 0.40 0.39 19 0.36 0.32 0.22 0.25 35 0.39 0.31 0.43 0.34 0.33 0.48 0.36 20 0.41 0.29 0.29 0.22 4.9 0.47 0.32 0.45 0.35 0.38 0.44 0.41 21 0.33 0.28 0.17 0.23 0.37 0.40 0.33 0.33 0.31 0.48 0.46 0.39 22 0.34 0.23 0.20 0.28 0.30 0.39 0.37 0.35 0.29 0.39 0.42 0.33 23 0.29 0.25 0.20 0.27 0.33 0.30 0.37 0.35 0.34 0.36 0.43 0.41 24 0.29 0.25 44 37 0.33 0.31 0.38 0.33 0.31 0.38 0.41 0.39 25 0.28 0.23 0.39 38 0.32 0.36 0.34 0.35 0.38 0.41 0.41 0.45 26 0.38 0.24 42 4.2 0.54 0.32 0.37 0.34 0.38 0.37 0.43 0.41 27 0.26 0.30 0.43 0.46 0.53 0.31 0.35 0.38 0.33 0.41 0.49 0.31 28 0.26 0.21 0.24 0.38 0.71 0.34 0.34 0.42 0.45 0.33 0.55 0.30 29 0.29 1.7 7.1 0.28 --- 0.34 0.42 0.44 0.35 0.33 0.52 0.25 30 0.27 18 4.3 0.28 --- 0.34 0.38 0.45 0.35 0.38 0.53 0.32 31 0.28 --- 0.29 0.27 --- 0.32 --- 0.42 --- 0.37 0.58 --- Total 59.39 142.71 292.99 87.08 58.38 109.22 10.10 42.62 11.49 11.37 13.10 14.14 Mean 1.92 4.76 9.45 2.81 2.08 3.52 0.34 1.37 0.38 0.37 0.42 0.47 Max 49 34 101 38 35 89 0.42 30 0.66 0.48 0.58 1.6 Min 0.26 0.19 0.17 0.19 0.22 0.30 0.27 0.30 0.29 0.31 0.32 0.25 Ac-ft 118 283 581 173 116 217 20 85 23 23 26 28

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1970 - 2013, BY WATER YEAR (WY) Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Mean 15.8 14.9 24.9 33.7 36.9 24.7 9.07 11.1 14.9 17.1 14.8 12.8 Max 126 113 189 221 193 257 68.6 104 184 176 191 198 (WY) (1979) (1976) (1976) (2005) (1980) (1978) (1974) (1997) (1976) (1974) (1974) (1997) Min 0.06 0.23 0.53 0.55 0.33 0.30 0.14 0.22 0.06 0.07 0.14 0.13 (WY) (1978) (1978) (1970) (1972) (1972) (1972) (1977) (1973) (1977) (1977) (1976) (1977)

— 2 — Water-Data Report 2013 11073360 Chino Creek at Schaefer Avenue, near Chino, CA—Continued

SUMMARY STATISTICS Calendar Year 2012 Water Year 2013 Water Years 1970 - 2013 Annual total 1,628.12 852.59 Annual mean 4.45 2.34 19.2 Highest annual mean 92.4 1974 Lowest annual mean 2.34 2013 Highest daily mean 205 Mar 17 101 Dec 13 2,060 Mar 1, 1978 Lowest daily mean 0.17 Dec 21 0.17 Dec 21 0.00 May 21, 1977 Annual seven-day minimum 0.24 Dec 5 0.21 Jan 11 0.02 Oct 28, 1977 Maximum peak flow 1,260 Mar 8 12,700 Feb 27, 1983 Maximum peak stage 5.81 Mar 8 10.32 Feb 27, 1983 Annual runoff (ac-ft) 3,230 1,690 13,880 10 percent exceeds 1.7 0.81 60 50 percent exceeds 0.67 0.36 1.3 90 percent exceeds 0.29 0.25 0.39

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DISCHARGE, CUBIC FEET PER SECOND PER FEET CUBIC DISCHARGE, 2

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0.1 O N D J F M A M J J A S 2012 2013

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