HomeMy WebLinkAboutCT 80-38; Paseo Del Lago; Drainage Study; 1989-03-23DKFI I NAGE STUDY
MFIDISWN SUeRE DEVELWPMENT
HENRY WORLEY ASSOCIATES, INC.
:3/2:3/89 CIVIL ENGINEERING 0 SURVEYING 0 PLANNING
7875 CONVOY COURT. SUITE A-2
SAN DIEGO. CA 92111 6l!4 S71.779R
METHODS USED
""""""
- THE RATIONAL METHOD WAS USED FOR HYDROLOGY CALCS., WITH THE
LATEST CHARTS GIVEN BY THE HYDROLOGY MANUAL OF 'THE COUN'TY OF SAN
DIEGO.
- AT THIS SITE SOIL .TYPE RANGES FROM "C" TO "D".
- PIPE CAPACITIES WERE COMPUTED USING THE MANNING'S EDUATION.
SUMMARY OF FLOW RATES AT INLETS:
AREA
8
8A
8B
€IC
8D
8E
9A
10 Hl
12 H
14
10 A
10 H
D 50 (cfs)
1.6
2.5
d. 1
1.2
1.1
0.4
4.1
1.2
1.6
0. 7
2.3
1.6
E
PAGE 1 OF 6
SUMMARY OF PIPE FLOW RATES:
POINT TO POINT
A - HDWL
El-c
C-n
E-F
F-G
H-I
I-J
J - K
a 96 (cfs)
-I. 1
1.2
2.2
4.1
5.2
1.6
2.3
4.b
c
TIMES OF CONCENTRATION: ""--"""~""""-
OFFSITE AREAS:
(CHART FOR NATURAL WATERSHEDS)
(MINIMUM TC = S MIN.)
AREA L H TC
8 fro(:, i 05 2
9 1 1 00 150 3. 5 -7
AREA
86
8 c
8n
8E
ONS I TE AREAS:
(CHART FOR URBAN AREAS)
L S% C TC
280 6.5 6.9 8
270 0. 8 0. 9 7
200 i 0. 9 5
i io 1 0. 9 4
PAGE 2 OF 6
ONSI'TE AREAS:
(CHART FOR URBAN AREAS)
TC FOR DRAINAGE SYSTEMS:
TC = Ti + Tf
Ti (inlet time) (county charts)
Tf (travel time) = (length)/(vel.) (min.)
PAGE 3 OF 6
APPEND I X - 1
CHARTS GRAFHS
1 DEPARTMENT OF SPECIAL DISTRICT SERVICES
SAN DlEGO COUNTY I URBAN AREAS OVERLAND TIME
OF FLOW CURVES
al r L
c, 2
c 0
OI
01 ar
+a L
VI a
a
r
n
0 c, .al
<
c >
>
C i u C t
c
!..
<"
a 'W
8-
6-Hour Precipitation (inches)' I
a
-0 r;l
e
w 0
a
3
-0 .lo
- .., .. ..
L XATION MAP pEZ?.S?,O~
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