FLOOD04539

• County: Arapahoe
• Community: Greewood Village
• Basin: South Platte
• Title: General Design Criteria
• Date: 9/1/1982
• Prepared For: Greenwood
• Floodplain - Doc Type: Educational/Technical/Reference Information

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~~ STORM SEWER LOSS COEFFICIENTS 0
~:D ENERGY ....
. (') 0
- . :D
'" - (JUNCTIONS) 3::
00 z
'" (')
0
. :D
JUNCTION CONDITION LOSS COEFFICIENT K. >
J -
:D Catch Basin with Inlet Flow Only diD 2.0 3.0, K 7.0 3.5 Z
m = to = to > (')
'TI 0 Q -
m diD - 3.0 to 6.0, K = 3.5 to 2.0 ....
:D 0 m<
m diD > 6.0 , K = 2.0 00
Z 0 ~'T1
(')
m Flow Straight Through Any Manhole o 10 = 0.6 1.0, .-2.5 -
to K to 0 QQ
.. u 0 Z:D
cd o 10 = , .0 to , .4, K = 0 to 1.3 >~
l'l.... u 0
nO' Zz
g~ Rectangular Manhole, Thru Pipe and Inlet Flow Refer to Figure-8-8 in the USDCM O~
.
en Vol. I, Section on "Storm Sewers" ....0
- ... mO
"'0
"'.... Rectangular Manhole wi th In-Line Upstream Refer to Figure-8-9 in (')0
"'a the USDCM :I:
t:l Main and 900 Lateral Pipe (with or without Vol. I, Section on "Storm Sewers" Z<
... inlet flow) 0;:
..
.... >r-
" r->-
.. 900 De flection OLIOo
"" Square or Round Manhole at . 0.6 to , .3, K = , .5 Q
'" (')m
n :D
.... Square Round M;mhole on Through Pipeline OL'Oo 0.6 0.9, 2.4 1.7
.... or at = to K = to ....
... Junction of a 900 Lateral Pipe (large size m
'"
.... OLIOo = 0.9 to , .3, K = '.7 to 1.5 "
.... laterals: DLIDo > 0.6) -
.. >-
:.: (')
!l Sq'Jare or Round Manhole on Through Pipeline o 10 - 0.6 to 1.2, K =-1.2 to 1.2 0
c: at Junction of a 900 Lateral Pipe (Smaller u 0 0
..
..... size laterals: OLIOo < 0.6) m
;!
d,B manhole depth and width III
r-
D,Q sewer diameter and flow rate m
U,L,O denote upstream, lateral, and outfall sewer .,