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 USGS Station 01491000
CHOPTANK RIVER NEAR GREENSBORO, MD

CHOPTANK RIVER BASIN

Latitude: 38^59'50"; Longitude: 75^47'10"
Hydrologic Unit Code: 02060005
Drainage area: 113 square miles.
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 01491000

                                           MEDIAN   
                     25             75     CUMU-    
                   QUAR            QUAR-   LATIVE   
PERIOD      AVG.    ILE   MEDIAN   TILE    RUNOFF   
           (cfs)   (cfs)   (cfs)   (cfs)   (inch)   
-------------------------------------------------
OCT.	    63.4    16.7    27.7    95.4    0.28
NOV.	    78.9    27.7    47.0    93.6    0.77
DEC.	     141    60.3    98.6     192    2.15
OCT-DEC	    94.4    36.4    71.1     137
CALYEAR	     130    78.9     110     177

JAN.	     197    95.0     181     266    4.38
FEB.	     226     124     179     327    6.67
MAR.	     249     146     213     358    8.74
JAN-MAR	     224     167     213     287
OCT-MAR	     159     107     145     195

APR.	     202   100.0     168     269    11.5
MAY	     133    57.4     114     175    13.1
JUNE	    99.0    35.3    70.8     120    13.9
APR-JUN	     144    77.7     133     184

JULY	    64.0    16.9    39.7    74.1    14.3
AUG.	    77.4    15.5    26.0    79.6    14.7
SEP.	    42.3    13.4    24.3    58.3    14.8
JUL-SEP	    61.2    17.0    36.2    82.5
APR-SEP	     102    51.6   100.0     127

WATYEAR	     131    89.1     123     187

Extreme High and Low Monthly and Daily Average Flows for Station 01491000

                    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.	402.    72 178.    80 169.    90 2450.   72 9.85    66 11.70   87 11.70   88 5.80    87 
NOV.	476.    57 387.    73 307.    52 3730.   57 10.90   66 16.20   88 18.60   65 8.40    66 
DEC.	475.    73 451.    52 440.    49 3140.   52 13.30   66 23.10   88 30.60   69 11.     66 
JAN.	559.    78 471.    76 441.    49 2200.   61 17.90   66 38.     50 45.50   69 10.     66 
FEB.	646.    79 511.    61 416.    73 5900.   79 42.80   66 71.80   77 98.80   80 13.     66 
MAR.	557.    78 468.    84 421.    83 2490.   78 43.70   66 73.90   85 82.90   81 36.     66 
APR.	649.    83 429.    84 378.    52 2370.   52 47.20   66 65.     85 67.40   63 26.     66 
MAY	457.    89 298.    58 297.    48 1700.   90 30.30   77 40.     76 41.80   63 17.     59 
JUNE	329.    72 322.    89 250.    83 2370.   72 19.50   86 20.30   77 20.90   65 8.80    77 
JULY	421.    75 196.    58 192.    89 2510.   75 9.49    77 12.10   86 12.10   57 2.40    77 
AUG.	829.    67 570.    58 291.    69 6160.   67 5.31    66 6.27    87 7.02    57 1.50    66 
SEP.	323.    60 172.    75 143.    89 3400.   60 9.38    87 10.30   86 10.90   64 2.30    66
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