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 USGS Station 50038100
RIO GRANDE DE MANATI AT HIGHWAY 2 NEAR MANATI, PR

RIO GRANDE DE MANATI BASIN

Latitude: 18^25'52"; Longitude: 66^31'37"
Hydrologic Unit Code: 21010002
Drainage area: 197 square miles (510 km2), approximately, of which about 38 mi2 (98 km2) is partly or entirely noncontributing, excludes 6.0 mi2 (15.5 km2) upstream from Lago El Guineo and Lago de Matrullas.
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 50038100

                                           MEDIAN   
                     25             75     CUMU-    
                   QUAR            QUAR-   LATIVE   
PERIOD      AVG.    ILE   MEDIAN   TILE    RUNOFF   
           (cfs)   (cfs)   (cfs)   (cfs)   (inch)   
-------------------------------------------------
OCT.	     789     312     515    1038    3.01
NOV.	     617     283     346    1078    6.05
DEC.	     405     144     258     458    7.78
OCT-DEC	     603     297     448     702
CALYEAR	     368     261     310     400

JAN.	     233     128     210     301    8.95
FEB.	     206     133     191     270    9.80
MAR.	     202     119     175     268    11.2
JAN-MAR	     213     144     193     269
OCT-MAR	     408     269     324     476

APR.	     378     151     372     493    13.8
MAY	     672     153     274     870    17.9
JUNE	     229     131     162     270    21.0
APR-JUN	     426     144     303     693

JULY	     154    96.5     125     155    21.8
AUG.	     233     109     144     189    23.0
SEP.	     466     202     351     595    24.0
JUL-SEP	     284     160     220     300
APR-SEP	     355     204     261     496

WATYEAR	     383     264     348     443

Extreme High and Low Monthly and Daily Average Flows for Station 50038100

                    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.	2958.   71 2559.   86 1542.   75 48600.  86 161.    87 196.    83 212.    78 71.     78 
NOV.	1803.   71 1194.   78 1163.   85 10500.  88 123.    74 149.    81 170.    79 98.     74 
DEC.	1498.   71 1344.   82 828.    76 14200.  82 111.    79 119.    84 130.    87 92.     79 
JAN.	533.    71 518.    88 347.    70 3670.   88 105.    84 108.    78 114.    87 82.     84 
FEB.	444.    88 410.    71 292.    80 2460.   87 88.     84 105.    77 115.    90 64.     84 
MAR.	521.    72 347.    90 331.    83 4020.   83 68.     84 88.10   77 103.    73 49.     84 
APR.	986.    87 752.    78 695.    71 13900.  87 60.     84 88.80   77 113.    89 42.     84 
MAY	3178.   85 2458.   86 1326.   81 55900.  85 93.70   89 104.    77 137.    75 34.     84 
JUNE	747.    87 625.    70 491.    79 3230.   70 78.70   77 78.80   74 96.     75 56.     74 
JULY	577.    79 262.    70 261.    81 6350.   79 75.     84 83.20   74 85.40   90 51.     89 
AUG.	1644.   79 418.    88 325.    70 32900.  79 68.     84 104.    78 106.    82 47.     84 
SEP.	1510.   79 1383.   89 703.    84 13900.  89 127.    83 172.    86 188.    73 50.     77
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