11133000 SANTA YNEZ RIVER AT NARROWS, NEAR LOMPOC, CA
LOCATION.--Lat 34°38'14", long 120°25'28", in Canada de Salsipuedes Grant, Santa Barbara County, Hydrologic Unit
18060010, on left bank 0.6 mi upstream from State Highway 246, 1.9 mi east of Lompoc, 1.8 mi downstream from
Salsipuedes Creek, and 32 mi downstream from Lake Cachuma.
DRAINAGE AREA.--789 mi2.
PERIOD OF RECORD.--May 1947 to November 1951 (irrigation seasons only). May 1952 to September 1963, October 1964
to September 1979, October 1980 to current year. Records equivalent, except for low-flow periods, to those
published as "near Lompoc" (station 11133500), November to December 1906, October 1907 to September 1918, May
1925 to September 1960, and October 1978 to September 1980.
CHEMICAL DATA: Water years 1978-88.
REVISIONS.--WSP 1928: Drainage area.
GAGE.--Two water-stage recorders. Elevation of main gage is 85 ft (prior to Apr. 10, 1991, at datum 5 ft higher)
above sea level, from topographic map. See WSP 1715 for history of changes prior to Oct. 1, 1961. Since
Oct. 1, 1961, at various sites and datums within 0.1 mi of present site. Supplementary gage, used for
high-water periods, at site 0.6 mi downstream at datum 79.25 ft above sea level.
REMARKS.--Records good, except those for estimated daily discharges, which are poor. Flow regulated by Jameson
Lake, Gibraltar Reservoir, and since November 1952, by Lake Cachuma (stations 11121000, 11122000, and
11125500). Water diverted out of Jameson Lake, Gibraltar Reservoir, and Lake Cachuma to cities of Montecito,
Santa Barbara, and Goleta for municipal supply. Water pumped from wells along banks of river for irrigation
in valley upstream. Satellite telemeter at station. See schematic diagram of Santa Ynez River basin.
EXTREMES FOR PERIOD OF RECORD (water years 1952-63, 1964-93).--Maximum discharge, 80,000 ft3/s, Jan. 25, 1969,
gage height, 24.20 ft, from supplementary gage; no flow at times in most years.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Jan. 9, 1907, reached a stage of 22.0 ft, site and datum then in
use, discharge, 120,000 ft3/s, from mean-depth study.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1994 TO SEPTEMBER 1995
DAILY MEAN VALUES
(NOT PREVIOUSLY PUBLISHED)
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 17 7.2 9.0 13 e1200 194 1080 309 169 76 10 19
2 16 6.1 9.0 12 e950 188 1010 341 147 71 8.8 9.8
3 16 4.4 9.0 34 e750 353 1030 347 133 73 8.3 4.7
4 17 4.1 9.0 1280 e640 449 903 340 128 82 8.5 5.0
5 19 3.7 9.0 537 e530 2740 883 340 144 82 9.2 5.4
6 20 3.4 8.9 116 e450 4960 871 343 114 74 11 4.9
7 19 3.4 8.2 704 e380 4880 801 315 108 57 9.4 4.5
8 16 3.6 7.8 357 e330 4730 748 312 106 45 9.5 4.7
9 15 3.5 9.0 767 e290 2630 651 304 99 36 10 5.0
10 14 9.7 9.0 10700 e250 6300 605 286 94 30 8.9 9.5
11 12 9.6 9.2 5570 e230 14000 666 295 90 26 7.9 8.8
12 10 9.7 9.8 5030 e210 8610 659 310 85 24 8.0 6.8
13 18 9.5 10 4050 e190 3480 586 294 86 21 20 5.4
14 30 8.9 9.9 3060 e1580 4300 324 247 77 18 17 4.2
15 35 8.6 11 2630 e950 5200 489 294 76 16 23 5.7
16 38 9.3 11 2700 e660 4460 601 364 88 15 21 4.5
17 39 9.0 11 2140 e500 4180 605 301 116 15 18 2.9
18 43 9.7 11 1960 e430 2600 522 295 109 13 13 2.7
19 43 9.0 11 1720 e370 1580 500 300 114 12 12 2.8
20 35 9.0 9.9 1760 e335 1050 429 295 109 10 14 2.7
21 29 9.0 9.8 1300 e305 1120 439 289 103 9.8 15 2.1
22 24 9.0 9.8 1550 e280 1140 393 291 96 9.6 12 2.1
23 20 9.0 10 2820 e260 6980 407 275 90 8.3 9.3 2.4
24 16 9.0 12 6700 e240 6360 424 236 88 8.9 12 2.4
25 14 8.8 13 9320 e235 1720 413 223 86 8.4 14 2.7
26 12 8.9 13 9410 e230 1380 314 234 84 9.1 10 2.9
27 11 9.0 13 7470 e220 1440 277 267 81 7.4 16 3.2
28 9.8 9.0 13 6310 217 1350 315 268 77 6.7 12 3.4
29 9.2 9.0 13 3860 --- 1210 311 275 72 10 11 3.6
30 8.0 9.0 13 1910 --- 1120 371 262 73 14 20 3.5
31 7.2 --- 13 1520 --- 1130 --- 206 --- 12 23 ---
TOTAL 632.2 231.1 324.3 97310 13212 101834 17627 9058 3042 900.2 401.8 147.3
MEAN 20.4 7.70 10.5 3139 472 3285 588 292 101 29.0 13.0 4.91
MAX 43 9.7 13 10700 1580 14000 1080 364 169 82 23 19
MIN 7.2 3.4 7.8 12 190 188 277 206 72 6.7 7.9 2.1
AC-FT 1250 458 643 193000 26210 202000 34960 17970 6030 1790 797 292
e Estimated.
11133000 SANTA YNEZ RIVER AT NARROWS, NEAR LOMPOC, CA--Continued
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 1995, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 3.04 5.89 27.1 257 392 442 175 54.5 13.5 3.81 1.88 2.18
MAX 29.9 112 291 3303 4969 3590 1154 618 177 30.0 19.4 29.4
(WY) 1992 1966 1984 1969 1969 1983 1983 1983 1983 1983 1994 1992
MIN .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000
(WY) 1955 1955 1955 1989 1961 1990 1961 1961 1961 1960 1954 1954
SUMMARY STATISTICS FOR 1994 CALENDAR YEAR FOR 1995 WATER YEAR WATER YEARS 1952 - 1995
ANNUAL TOTAL 8189.05 244719.9
ANNUAL MEAN 22.4 670 113
HIGHEST ANNUAL MEAN 853 1969
LOWEST ANNUAL MEAN .000 1990
HIGHEST DAILY MEAN 921 Feb 20 14000 Mar 11 38000 Jan 25 1969
LOWEST DAILY MEAN .00 Jul 28 2.1 Sep 21 .00 Sep 18 1953
ANNUAL SEVEN-DAY MINIMUM .00 Jul 28 2.5 Sep 18 .00 Oct 23 1953
INSTANTANEOUS PEAK FLOW 19400 Mar 11 80000 Jan 25 1969
INSTANTANEOUS PEAK STAGE 14.73 Mar 11 24.20 Jan 25 1969
ANNUAL RUNOFF (AC-FT) 16240 485400 82070
10 PERCENT EXCEEDS 38 1640 103
50 PERCENT EXCEEDS 14 72 1.3
90 PERCENT EXCEEDS .49 7.2 .00
11133000 SANTA YNEZ RIVER AT NARROWS, NEAR LOMPOC, CA--Continued
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 3.0 6.1 16 32 81 95 e38 e8.1 e3.0 .16 20 11
2 3.6 6.1 22 32 85 88 e39 e7.6 e3.0 .16 18 9.4
3 6.3 5.7 21 29 89 83 e36 e7.2 e2.9 .16 18 8.8
4 6.4 5.2 22 24 109 79 e34 e7.2 e2.8 .16 19 9.1
5 6.1 6.0 22 21 126 84 e33 e6.7 e2.7 .16 21 8.6
6 5.4 8.1 17 22 152 72 e32 e6.4 e2.2 .16 22 8.2
7 5.1 12 14 21 147 67 e31 e6.2 e.88 .16 24 7.7
8 2.8 12 14 23 88 60 e30 e6.1 e.78 .16 24 7.4
9 3.0 12 14 22 74 56 e28 e5.7 e.78 .16 23 7.2
10 3.1 11 14 20 65 51 e26 e5.5 e.75 .14 24 7.3
11 3.1 12 15 18 61 49 e24 e5.3 e.71 .10 27 7.3
12 3.2 15 22 18 54 64 e23 e5.0 .79 .10 30 18
13 3.1 17 46 18 46 105 e22 e4.9 1.0 .15 31 20
14 3.1 18 32 18 40 e94 e22 e4.8 1.0 .16 28 19
15 2.9 16 30 17 37 e79 e21 e4.6 .92 .16 28 20
16 2.7 16 30 19 37 e69 e21 e4.4 .83 .16 28 19
17 3.1 19 29 23 32 e61 e20 e4.3 .96 .16 23 20
18 2.8 23 30 25 30 e54 e20 e4.2 .93 .16 21 20
19 2.7 24 32 26 47 e50 e19 e4.1 .70 .16 20 20
20 2.7 25 31 27 1850 e48 e18 e4.0 .61 .16 20 18
21 3.0 18 31 27 1370 e46 e16 e3.9 .54 .16 20 17
22 5.0 13 29 32 717 e44 e14 e3.8 .51 .16 18 16
23 6.0 15 30 29 206 e44 e13 e3.7 .47 .15 18 17
24 5.2 21 29 29 154 e42 e13 e3.7 .59 .07 18 18
25 5.0 22 30 31 138 e42 e12 e3.6 .63 .05 19 19
26 5.0 22 30 36 124 e41 e11 e3.5 .62 .01 26 20
27 4.9 20 30 36 133 e40 e10 e3.3 .62 .00 32 22
28 4.6 19 30 38 128 e40 e9.6 e3.2 .42 3.4 33 23
29 4.2 17 30 34 103 e39 e8.9 e3.2 .21 30 29 24
30 3.9 16 30 31 --- e37 e8.4 e3.1 .19 45 20 25
31 5.0 --- 29 47 --- e36 --- e3.0 --- 27 15 ---
TOTAL 126.0 452.2 801 825 6323 1859 652.9 150.3 33.04 109.05 717 467.0
MEAN 4.06 15.1 25.8 26.6 218 60.0 21.8 4.85 1.10 3.52 23.1 15.6
MAX 6.4 25 46 47 1850 105 39 8.1 3.0 45 33 25
MIN 2.7 5.2 14 17 30 36 8.4 3.0 .19 .00 15 7.2
AC-FT 250 897 1590 1640 12540 3690 1300 298 66 216 1420 926
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 1996, BY WATER YEAR (WY)
MEAN 3.06 6.11 27.1 251 388 433 171 53.3 13.2 3.80 2.37 2.50
MAX 29.9 112 291 3303 4969 3590 1154 618 177 30.0 23.1 29.4
(WY) 1992 1966 1984 1969 1969 1983 1983 1983 1983 1983 1996 1992
MIN .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000
(WY) 1955 1955 1955 1989 1961 1990 1961 1961 1961 1960 1954 1954
SUMMARY STATISTICS FOR 1995 CALENDAR YEAR FOR 1996 WATER YEAR WATER YEARS 1952 - 1996
ANNUAL TOTAL 244911.5 12515.49
ANNUAL MEAN 671 34.2 111
HIGHEST ANNUAL MEAN 853 1969
LOWEST ANNUAL MEAN .000 1990
HIGHEST DAILY MEAN 14000 Mar 11 1850 Feb 20 38000 Jan 25 1969
LOWEST DAILY MEAN 2.1 Sep 21 .00 Jul 27 .00 Sep 18 1953
ANNUAL SEVEN-DAY MINIMUM 2.5 Sep 18 .09 Jul 21 .00 Oct 23 1953
INSTANTANEOUS PEAK FLOW 5240 Feb 20 80000 Jan 25 1969
INSTANTANEOUS PEAK STAGE 8.46 Feb 20 24.20 Jan 25 1969
ANNUAL RUNOFF (AC-FT) 485800 24820 80700
10 PERCENT EXCEEDS 1640 55 100
50 PERCENT EXCEEDS 72 18 1.4
90 PERCENT EXCEEDS 4.7 .62 .00
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