FLOOD05043

• County: Statewide
• Basin: Statewide
• Title: Dimensionless Graphs of Floods from Ruptured Dams
• Date: 1/1/1974
• Prepared For: US
• Prepared By: COE
• Floodplain - Doc Type: Educational/Technical/Reference Information

at point 1;

'/011 =
1

r.
fI~+ 11
\ . .,

. "'+2
<; "I
.0

(T -4)

at poi.,t 2;

-

Vo 12 = 3 . (M~ 1 )

<;
o

V "'+::>
,

(T-S)

Solving equations (1-4) ~nd (I-S) yields
" = (10')(11'11,1'/011 )/1o')(V,I"l)) - ::>

(I -Ii)

C = 1'^11 " 1. . 0'+1) . .. IV ~'+2
. u '.'0. 1

( !-7)

-
Since M is dimensionless, ~ny units M~Y h~ used fo~ Vol and for" in

equation (1-6). Equation (1-7) re'lllir..s consistent units hetl.teen Vol ~nd

Y, ho~rever. The follO\~inlJ examrle illustr~tes the 'Jse of eqllations (I-Ii)

and (T-7).

Actually, any two arhitrary roints m~'y he selected for calculati'lg C

and M.

Ho~/ever, in ~eepin'1 with the ohjer1;i"e of approxi!l1~ting the reservoir

the head on the daM at the 1;ime of fi!i1ure is selerted as one of the
4
and ~ of that head is used for the other. These are converted to

volume.

points

elevations and reservoir storanes read frflm the elevation capacity curve

as follows.

Table 1-1. Data for Calclllatinn COl"fficients for the Prismatic Sectfon

1

Head
@

1\6

31\

Channe 1
Flevation

PM1
Flev~tion

Reservoir
ac ft

Vglume
10 cu ft

Point

1323

14flCl

26577

2

1323

1161

4134

1157.476
1 SO .077

.

Substi tuting thfOse data into fOqllations (T -6) and (I-7)
~ : (Log(4114/26572)/Log(3~/86)) - ?O
,~ : 0.278
C = 180.077(106) . 3 . 1.278 .0.001/382.278
C : 173.92 ft

i'

64