HomeMy WebLinkAboutCT 00-02; CALAVERA HILLS; HYDROLOGY STUDY CALAVERA HILLS DISPOSAL; 2002-11-15QT OO-C?:L^
HvomuxkY STUDY
C/kA\/E£A 1^1 LLS 11 DISPOSAL
CT 00'OZ
,,,5900 PASTEUR: cou/a- SUITE too
476^) 31-7700
i>ArE
OLKVO. 2.^7/6 . 50 Ys- O,6002^n/s (,o\ MM PAmo^
(D
DEWATZRjHir HOLES A-A^'f^/SiW^TZy VJ
Hi
^^vsB 3-1.5" biA HOLES
...
^HbFlPE SlIlN6r
Af^ Al
CIVILDESIGN CORP.
Consulting Engineers
250 S. Lena Rd.
San Bernardino, CA 92408
(909)885-3806
Inside Diameter
( 12.00 in.)
Water
( 6.36 in.)
( 0.530 ft.)
Circular Channel Section
4 . 840 CFS
11. 441 fps
12 000 inches
6 362 inches
0 530 feet
Critical Depth 0 905 feet
Depth/Diameter (D/d) 0 530
4 340 o O
0 423 sq. ft
1 631 feet
AR"(2/3) 0 172
0 Oil
Min. Fric. Slope, 12 inch
1 .320 Q,
O
(D
CIVILDESIGN CORP.
Consulting Engineers
250 S. Lena Rd.
San Bernardino, CA 92408
(909)885-3806
Inside Diameter
( 12.00 in.)
*
* *
AAAAAAAAAAAAAAAAAAAA/
Water
* ( 9.48 in.)
( 0.790 ft.)
* *
* *
* V
Circular Channel Section
Flowrate 14.080 CFS
Velocity 21.156 fps
Pipe Diameter 12.000 inches
Depth of Flow 9.483 inches
Depth of Flow 0.790 feet
Critical Depth Greater than Pipe Diameter
Depth/Diameter (D/d) 0.790
Slope of Pipe 12.000 %
X-Sectional Area 0.666 sq. ft.
Wetted Perimeter 2.190 feet
AR"(2/3) 0.301
Mannings 'n' 0.011
Min. Fric. Slope, 12 inch
Pipe Flowing Full 11.188 %
810-10
May 3, 1988
HIGHWAT DESIGN MANUAL
Figure 816.6A
Overland Time of Concentration Curves
1000
UJ
Ui
tl.
UJ
o
CO
5
UJ
>
<
oc
o z < -1 oc
UJ
> o
800 CO UJ
I-
UJ
>
< oc
I-
U.
o
UJ
I-
o
oc
UJ
> o
1.8(1.1-0) (L)
[sdoo)]^'^
1/2 Where:
C
L
S
To
Runoff Coeffteient
Overlanci Travel
Distance in feet
Slope in ft./ft.
Time in minutes
TABLE 2
RUNOFF COEFFICIENTS (RATIONAL METHOD)
DEVELOPED AREAS (URBAN)
Land Use
Residential:
Single Family
MuJti-Units
Hobile homes
Rural (lots greater than 1/2 acre)
Commerci al(2)
80% Impervious
Industrial(2)
90% Impervious
Coefficient. C
Soi1 Group (1)
A B C 0
.^0 .^5 .50 .55
.50 .60 .70
.50 .55 .65
.30 .35 AO M
.70 .75 .80 .85
.80 .85 .90 .95
NOTES
(1) Soil Group mans are available at the offices of the Departinent of Public Works.
(2)where actual conditions deviate significantly from the tabulated impervious-
ness values of 80% or 90%, the vaiues given for coefficient C. may be revised
by multiplying 80% or 90% by the ratio of actual imperviousness to the
tabulated imperviousness. However, in no case shall the final coefficient
be less than 0.50. For example: Consider commercial property on D soil.group.
Actual imperviousness = 50%
Tabulated imperviousness = 80%
Revised C = ^ x 0.85 = 0.53
80
IV-A-9
APPENDIX IX-B
Rev. 5/81
courrrv OF SAN DIEGO
DEPARTMENT OF SANITATION &
FLOOD CONTROL
33*
100-YEAR 8-H0U1 PSlECIPITATIOfj
70^ ISOPLUVIALS OF lOO-YEAR 6-HOUR
PRECIFITATIOn l.^l jfEfiTDS GF AH lilCli
>
U.S. DEPARTMEN T OF COMMERCE
NATIONAL OCEANIC AND AT.^OSPIIEKIC ADMINISTRATION
SPECIAL STUDIES BRANCH, OFFICE OF II
30' _
1
118'
COUNTY OF SAN DIEGO
OEPARTMENT OF SANITATION &
FLOOO CONTROL
^5'
33-
30'
15'
i»5'
U.S. DEPARTMEN
NATIONAL OCKAMC ANO ATr.
SPECIAL STUDIES UKANCII. OFKICE Of 11
30' -
lOO-YEAR 24-IIOl|R PRECIPITATION
'"20-^ ISOPLUVIALS 0
PRECIPITATIOH IM
100-YEAR 24-HOUn
EMTHS OF AN IMCH
•d by
r OF COMMERCE
USniCKIC AD.MINISTRATIUN
DliOLOCY, NATIONAL WEATHER SERVICE
I
5» 11 ir 30' I'i' 117' :io» 116"