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 USGS Station 06485500
BIG SIOUX RIVER AT AKRON, IA

(National stream-quality accounting network station)

BIG SIOUX RIVER BASIN

Latitude: 42^50'14"; Longitude: 96^33'41"
Hydrologic Unit Code: 10170203
Drainage area: 8,424 square miles, of which 1,487 mi2 is probably noncontributing.
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 06485500

                                           MEDIAN   
                     25             75     CUMU-    
                   QUAR            QUAR-   LATIVE   
PERIOD      AVG.    ILE   MEDIAN   TILE    RUNOFF   
           (cfs)   (cfs)   (cfs)   (cfs)   (inch)   
-------------------------------------------------
OCT.	     605     145     270     641   13478
NOV.	     589     163     253     686    0.06
DEC.	     370     110     171     428    0.08
OCT-DEC	     521     158     209     521
CALYEAR	    1250     379     729    1557

JAN.	     232    70.0     109     334    0.09
FEB.	     497    81.0     253     617    0.14
MAR.	    2489     600    1849    4083    0.45
JAN-MAR	    1072     269     896    1753
OCT-MAR	     797     248     557    1188

APR.	    3784     772    1436    5914    0.66
MAY	    1752     489     976    2306    0.84
JUNE	    2011     493    1181    2131    0.93
APR-JUN	    2515     598    1173    3772

JULY	    1152     247     796    1357    1.03
AUG.	     566     200     356     811    1.08
SEP.	     651     158     256     591    1.15
JUL-SEP	     789     230     455    1137
APR-SEP	    1652     396     743    2116

WATYEAR	    1224     403     764    1819

Extreme High and Low Monthly and Daily Average Flows for Station 06485500

                    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.	4039.   87 2329.   83 1992.   86 9310.   87 32.90   59 38.10   41 45.20   77 29.     59 
NOV.	3022.   80 2914.   83 2003.   87 8330.   80 47.90   59 49.70   77 51.10   56 30.     59 
DEC.	1967.   83 1315.   87 1275.   80 2690.   83 32.10   77 32.50   59 32.70   56 17.     77 
JAN.	841.    83 742.    87 721.    73 1750.   73 6.70    77 22.50   59 27.20   36 4.      77 
FEB.	2399.   66 1943.   44 1813.   83 16000.  66 12.10   36 14.10   59 21.60   77 5.40    77 
MAR.	8866.   83 6588.   86 5652.   73 50700.  62 124.    31 128.    34 141.    56 11.     36 
APR.	20689.  69 13937.  84 11526.  52 77500.  69 139.    31 172.