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 USGS Station 09471000
SAN PEDRO RIVER AT CHARLESTON, AZ

(National stream-quality accounting network station)

GILA RIVER BASIN

Latitude: 31^37'33"; Longitude: 110^10'26"
Hydrologic Unit Code: 15050202
Drainage area: 1,234 square miles, of which 696 mi2 is in Mexico.
Additional information is available about this station.
Use these links to retrieve Streamflow Hydrograph, or tab-separated ASCII file of monthly data.

Summary of Monthly Flows (1961-90)for Station 09471000

                                           MEDIAN   
                     25             75     CUMU-    
                   QUAR            QUAR-   LATIVE   
PERIOD      AVG.    ILE   MEDIAN   TILE    RUNOFF   
           (cfs)   (cfs)   (cfs)   (cfs)   (inch)   
-------------------------------------------------
OCT.	    65.4    5.48    9.17    27.8    0.01
NOV.	    15.0    8.71    12.1    17.0    0.02
DEC.	    48.5    12.2    15.5    26.9    0.04
OCT-DEC	    43.0    9.36    14.0    36.6
CALYEAR	    45.4    23.4    36.2    57.4

JAN.	    39.9    13.2    15.8    24.7    0.06
FEB.	    28.3    13.3    16.2    32.0    0.07
MAR.	    25.2    12.2    14.3    22.6    0.08
JAN-MAR	    31.1    13.4    15.8    30.0
OCT-MAR	    37.0    10.7    14.3    35.8

APR.	    12.9    9.33    10.8    15.2    0.09
MAY	    7.64    5.29    7.02    9.60    0.10
JUNE	    5.14    2.67    3.44    5.94    0.10
APR-JUN	    8.56    5.90    7.79   10.00

JULY	    89.8    35.2    70.7     135    0.22
AUG.	     146    40.8    76.2     188    0.35
SEP.	    49.7    16.7    35.2    80.6    0.39
JUL-SEP	    95.2    35.3    83.1     116
APR-SEP	    51.9    25.1    44.8    62.7

WATYEAR	    44.8    25.2    35.1    51.2

Extreme High and Low Monthly and Daily Average Flows for Station 09471000

                    SECOND     THIRD                             SECOND     THIRD                
        MON.  HI.  MON.  HI.  MON.  HI.  DAILY  HI.  MON.  LO.  MON.  LO.  MON.  LO.  DAILY  LO. 
       ----------- ---------- ---------- ---------- ---------- ---------- ---------- ----------  
        FLOW  YR.  FLOW  YR.  FLOW  YR.  FLOW   YR.  FLOW  YR.  FLOW  YR.  FLOW  YR.  FLOW   YR. 
PERIOD  (cfs)      (cfs)      (cfs)      (cfs)       (cfs)      (cfs)      (cfs)      (cfs)      
------ ----------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
OCT.	1087.   78 385.    84 166.    27 18400.  78 2.95    74 3.31    66 3.36    63 1.      25 
NOV.	128.    20 61.70   79 57.90   14 1150.   79 5.03    17 5.65    83 6.16    66 2.      16 
DEC.	1230.   15 429.    79 326.    85 7750.   79 5.97    25 8.06    14 8.65    81 4.      25 
JAN.	507.    79 278.    15 141.    60 6420.   79 9.48    25 9.68    81 10.     53 0.50    23 
FEB.	217.    15 130.     6 112.    83 1100.   15 7.18    23 9.11    81 9.36    25 2.      17 
MAR.	160.    15 152.     5 110.    83 699.    83 8.10    19 8.74    14 9.03    22 2.30    13 
APR.	66.50    5 50.70   15 30.70   79 145.     5 3.03    13 3.97