FLOOD05393

• County: Statewide
• Basin: Statewide
• Title: Flood-Hydrograph Analyses and Computations
• Date: 8/31/1959
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Educational/Technical/Reference Information

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; (,l) UNIT HYDROGRAPHS FOR TOTA.L
BASIN /~BOVE DAM SITE. UNDER
~ :NATURAL RIVER CONDITIONS,
'~' ',_. -"'-'''-''- '~-, T'-
~

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24 48 72 96 120 144
IN HOURS :"ROM BEGINNING OF RAINFAll - EXCESS

SUB-
FULL

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TIME IN HOURS

40
FROM

72 96 120 144
BEGINNING OF RAINFAll - EXCESS

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.SPARTANBURG

EQUALS TOTAL BASIN
eovE HEA'D OF RESERVOIR
(D. A. 970 SQ, MI.)

ee) LOCATION MAP

SUB-AREA @
(TOTAL O,A,
93 SQ, MI.)
SUB .AREA (j)
AESE:RVOIR SUR 'fACE
37SQ,MI,)
CHAPPELLS
STREAM GAGE
(D. A.1290
SQ. MI.)

SCA~E OF MILoE!
9 -' 1.0 11' 20

(d) DATA RELATING TO UNIT H'fDROGRAPHS
NO.DYRN~-i'ON AREA REPRESENTED
IN HOURS IDENTIFICATION SQ. MI.
'-AI 6 SUS-AREA NO. ; 970
l-el 6 " " '" 970
1-C 6 " .. "1 970
2 6 II "" 93
3 6 " "" 37
4 6 TOTAl ABOVE OAM SITE 1100
5 12 1100
*OBTAINED BY ARBITRARILY MODIFYINC UNIT HYOROGRAPH NO,

REMARKS

EQUALS UNIT HYDROGRAPH CD, PLATE 14
LTERNATE TO NO, I-A: PEAK"125% PEAK OF l-A,
LTERNATE TO NO.1-A: PEAK =150'7. PEAK OF I-A.
ESTIMATED FOR SUM OF SMALL AREAS.
RATE OF RUNOFF-RAINFALL INTENSITY,
FOR NATURAL RIVER CONDITIONS.

l-A,

UNIT HYDROGRAPHS USED IN DEVELOPING SPILLWAY DESIGN FLOOD CRITERIA

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