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Basin Data Norwalk River at South Wilton, Connecticut

LOCATION DATA

USGS STATION NUMBER 01209700
USGS STATION NAME Norwalk River At South Wilton, Ct
HYDROLOGIC UNIT CODE 01100006
BASIN NAME Saugatuck
LATITUDE 41o 09' 49"
LONGITUDE 73o 25' 11"
LOCATION On Rt Bank US of Kent Road Bridge
SECTION(S)  
TOWNSHIP  
RANGE  
COUNTY Fairfield
STATE Connecticut
USGS 7.5 MINUTE QUAD: Norwalk North, CT
COMMENTS 2.5 miles North of Norwalk

BASIN CHARACTERISTICS

DRAINAGE AREA - SQ MILES 30.0
MAIN CHANNEL SLOPE - FT/FT 0.00421
MAIN CHANNEL LENGTH - MILES  
MEAN ANNUAL PRECIPITATION - INCHES  
MEAN ANNUAL RUNOFF - INCHES (1962-1984)  
MEAN BASIN ELEVATION - FEET  
PERIOD OF RECORD - 34 YEARS WY 56, 8/1/62 to 09/30/92, WY 97-99
GAGE DATUM - AMSL (FEET) 115.69
~1.5 - YR STAGE - FEET 3.6
~1.5 - YR DISCHARGE - CFS 855
   
BANKFULL STAGE AT GAGE - FEET 3.25
BANKFULL DISCHARGE - FT3/SEC 612
BANKFULL RETURN INTERVAL - YRS 1.24

CROSS-SECTION #1

BANKFULL STAGE IN XS #1 (277 FT US FROM GAGE) - FEET 5.0
BANKFULL AREA IN XS#1 - FEET2 149
BANKFULL VELOCITY IN XS#1 - FT/SEC 4.1
BANKFULL TOPWIDTH IN RIFFLE SECTION (XS#1) - FEET 60
HYDRAULIC RADIUS IN BANKFULL XS#1 - FEET 2.40
MEAN DEPTH IN BANKFULL XS#1 - FEET 2.5
BANKFULL SLOPE THROUGH XS#1- FEET/FEET 0.00660
BANKFULL MANNING's n IN XS#1 0.053
SHEAR STRESS IN BANKFULL XS #1 - LBf/FT2 0.99
SIZE OF ROCK TRANSPORTED DUE TO TRACTIVE FORCE - mm 50
D84 - mm 163
D50 - mm 57
D16 - mm 0.3
WIDTH TO DEPTH - XS#1 24
ENTRENCHMENT RATIO - XS#1 2.9
SINUOSITY 1.1
STREAM CLASSIFICATION C4/1

CROSS-SECTION #2

BANKFULL STAGE IN XS #2 (490 FT US FROM GAGE) - FEET 6.4
BANKFULL AREA IN XS#2 - FEET2 135
BANKFULL VELOCITY IN XS#2 - FT/SEC 4.5
BANKFULL TOPWIDTH IN RIFFLE SECTION (XS#2) - FEET 64
HYDRAULIC RADIUS IN BANKFULL XS#2 - FEET 2.08
MEAN DEPTH IN BANKFULL XS#2 - FEET 2.1
BANKFULL SLOPE THROUGH XS#2- FEET/FEET 0.00660
BANKFULL MANNING's n IN XS#2 0.043
SHEAR STRESS IN BANKFULL XS#2 - LBf/FT2 0.86
SIZE OF ROCK TRANSPORTED DUE TO TRACTIVE FORCE - mm 44
D84 - mm 109
D50 - mm 1.5
D16 - mm 0.06
WIDTH TO DEPTH - XS#2 30
ENTRENCHMENT RATIO - XS#2 5.5
SINUOSITY 1.1
STREAM CLASSIFICATION C4/1

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