11180810 PALOMARES CREEK NEAR HAYWARD, CA

LOCATION.-Lat 37°41'40", long 122°01'26", in San Lorenzo Grant, Alameda County, Hydrologic Unit 18050004, on left bank,  at Palomares School, 0.1 mi 
upstream of confluence with San Lorenzo Creek, 3.6 mi northeast of Hayward.
DRAINAGE AREA.-9.08 mi2. 
PERIOD OF RECORD.-October 1997 to September 1998.
GAGE.-Water-stage recorder and crest-stage gage. Elevation of gage is 310 ft above sea level, from topographic map. 
REMARKS.-Records fair including estimated daily discharges. No regulation or diversion upstream from station. 
EXTREMES FOR CURRENT YEAR.-Peak discharges greater than base discharge of 250 ft3/s, or maximum: 
  			Discharge	Gage height			Discharge	Gage height
  	Date	Time	(ft3/s)	(ft)	Date	Time	(ft3/s)	(ft)
  	Jan. 12	1430	615	5.62	Feb. 3	0100	1,940	10.67
  	Jan. 15	1400	413	4.57	Feb. 6	1000	266	4.19
  	Jan. 18	1515	494	5.01	Feb. 21	1230	370	4.81

                  DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

                                               DAILY MEAN VALUES
 
DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
  1      e.02     e.07      .38      .27       16     17       12        3.9      2.6     1.2       .53      .27
  2      e.11     e.08     e.29     2.5       140     15       11        3.7      2.5     1.2       .49      .25
  3      e.05     e.08     e.27     2.0      e410     14       19        3.6      2.3     1.0       .43      .24
  4      e.03     e.08     e.25    16         e90     12       23        3.5      2.3     1.0       .40      .22
  5      e.03     e.07     e.40     6.4       e71     12       18        4.3      2.2      .96      .38      .24
 
  6      e.04     e.07     e.29     4.8      e101     11       17        3.9      2.2      .92      .43      .23
  7      e.04      .09   e20        4.8       e95      9.7     16        3.5      2.3      .85      .46     e.23
  8      e.04      .11    e4.0      3.9       e87      8.9     14        3.7      2.3      .87      .46     e.22
  9      e.80      .11     e.70     4.1       e62      8.0     13        3.4      2.1      .96      .39     e.22
 10      e.20      .81     e.50    21         e39      7.2     12        3.1      2.2      .94      .40     e.21
 
 11      e.07      .21      .38    60         e50      6.7     11        3.2      2.1      .89      .31     e.20
 12      e.06      .13      .24   207         e65      6.5      9.8      3.8      1.9      .81      .33      .20
 13      e.07      .14      .21    56         e49     28       17        3.2      1.7      .76      .33      .18
 14      e.06      .15     2.9     26         e94     15       11        2.9      1.7      .74      .30      .16
 15      e.06      .77      .96   127         e48     13        9.4      2.8      1.6      .72      .35      .21
 
 16      e.06      .17      .53    65         e67     13        8.8      2.8      1.6      .68      .39      .25
 17      e.06      .15      .41    25         e41     11        8.1      2.6      1.5      .66      .42      .25
 18      e.05      .15      .37   100         e38     10        7.6      2.6      1.4      .64      .43      .27
 19      e.05      .24      .29    57         e58      9.5      7.3      2.5      1.4      .58      .39      .28
 20      e.06      .17      .28    28         e46      9.0      6.8      2.4      1.4      .59      .38      .22
 
 21      e.05      .16      .30    19         e90      8.3      6.4      2.4      1.3      .65      .37      .25
 22      e.05      .16      .27    15         e44      7.8      6.0      2.3      1.2      .63      .37      .27
 23      e.05      .16      .28    11          71     16        5.6      2.2      1.2      .62      .36      .23
 24      e.05      .46      .28     8.7        42     21        5.4      2.2      1.2      .62      .34      .26
 25      e.05      .44      .28     7.0        35     18        5.1      2.2      1.2      .57      .33      .25
 
 26      e.05     7.2       .24     6.2        28     16        4.8      2.3      1.2      .54      .32      .27
 27      e.05      .92      .26     7.9        23     16        3.8      2.7      1.1      .53      .31      .32
 28      e.05      .29      .28     5.2        20     14        4.2      6.5      1.1      .71      .31      .29
 29      e.04      .36      .29    27         ---     12        4.1      3.9      1.1      .53      .29      .80
 30      e.06     3.1       .29    15         ---     11        3.9      3.1      1.1      .61      .31      .71
 31      e.07      ---      .27    16         ---     15        ---      2.8      ---      .58      .28      ---
 
TOTAL    2.53    17.10    36.69   954.77     2020    391.6    301.1     98.0     51.0    23.56    11.59     8.20
MEAN     .082      .57     1.18     30.8     72.1     12.6     10.0     3.16     1.70      .76      .37      .27
MAX       .80      7.2       20      207      410       28       23      6.5      2.6      1.2      .53      .80
MIN       .02      .07      .21      .27       16      6.5      3.8      2.2      1.1      .53      .28      .16
AC-FT     5.0       34       73     1890     4010      777      597      194      101       47       23       16
 
    e  Estimated.


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1998 - 1998, BY WATER YEAR (WY)                                 
 
          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
MEAN     .082      .57     1.18     30.8     72.1     12.6     10.0     3.16     1.70      .76      .37      .27
MAX      .082      .57     1.18     30.8     72.1     12.6     10.0     3.16     1.70      .76      .37      .27
(WY)     1998     1998     1998     1998     1998     1998     1998     1998     1998     1998     1998     1998
MIN      .082      .57     1.18     30.8     72.1     12.6     10.0     3.16     1.70      .76      .37      .27
(WY)     1998     1998     1998     1998     1998     1998     1998     1998     1998     1998     1998     1998
 
SUMMARY STATISTICS                            FOR 1998 WATER YEAR
 
ANNUAL TOTAL                                     3916.14         
ANNUAL MEAN                                        10.7          
  HIGHEST DAILY MEAN                                410      Feb  3
  LOWEST DAILY MEAN                                    .02   Oct  1
  ANNUAL SEVEN-DAY MINIMUM                             .05   Oct  1
  INSTANTANEOUS PEAK FLOW                          1940      Feb  3
  INSTANTANEOUS PEAK STAGE                           10.67   Feb  3
ANNUAL RUNOFF (AC-FT)                            7770            
10 PERCENT EXCEEDS                                 25            
50 PERCENT EXCEEDS                                  1.2          
90 PERCENT EXCEEDS                                   .11