HomeMy WebLinkAboutCT 00-22; REDEEMER BY THE SEA; DRAINAGE STUDY TENTATIVE MAP; 2001-09-12DRAINAGE STUDY
FOR
REDEEMER BY THE SEA
TENTATIVE MAP
CT 00-22
APN: 215-080-22
PREPARED BY:
SOWARDS AND BROWN ENGINEERING, INC.
CONSULTING ENGINEERS
2187 NEWCASTLE AVENUE, STE 103, CARDIFF, CA 92007
(760) 463-8500
00-129
9/12/01
RB
10'
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SOWARDS AND BROWN ENGINEERING
2187 Newcastte Ave., Suite 103
CARDIFF BY THE SEA, CALIFORNIA 92007
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2187 Newcastle Ave., Suite 103
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2187 Newcastle Ave., Suite 103
CARDIFF BY THE SEA, CALIFORNiA 92007
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TABLE 2
RUNOFF COEFFICIENTS (RATIONAL METHOD)
DEVELOPED AREAS (URbAN)
Land Use
Residential:
Single Family
.Multi-Units
.Mobile Homes
Rural (iots greater than 1/2 acre)
Commercial (2)
80% Impervious
Industrial (2)
90% Impervious
Coefficient. C
Soil Type (1)
D
.55
.70
.65
.85
.95
NOTES:
(1) Type D soil to be used for all areas.
(2) Where actual conditions deviate significantly from the tabulated
imperviousness values of 80% or 90%, the values 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.
Actual Imperviousness
Tabulated imperviousness
50 Revised C 80
50%
80%
x 0.85 = 0.53
82
' i ll, 1, I,
ELEV.
0-1500
ooo—3000
3000-4000
4 000-3000
3 000-6000
DESERT
FACTOR
100
1.2 3
142
1.60
1.70
00
OJ
To obluin corrtcl Inltnally,
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M IN UTES
20
D U RATI ON
HOURS
2 3 e 7 e 910
10 2 0
MINUTES
8 9 10
HOURS
DURATION
7-64 HANDBOOK OF HYDRAULICS
Table 7-13. Values of K for Circular Channels in the Formula
n
D - depth of water d = diameter of channel
.0
.1
.2
.3
.4
.5
.6
.7
.8
.9
1.0
.00
4.49
2.96
2.25
1.80
1.470
1.215
1.004
.821
.654
.463
.01
15.02
4.25
2.87
2.20
1.76
1.442
1.192
.984
.804
.637
.03
10.56
4.04
2.79
2.14
1.72
1.415
1.170
.965
.787
.621
8.57
3.86
2.71
2.09
1.69
1.388
1.148
.947
.770
.604
.04
7.38
3.69
2.63
2.05
1.66
1.362
1.126
.928
.753
.588
.05
6.55
3.54
2.56
2.00
1.62
1.336
I.IOS
.910
.736
.571
.06 .07
5.95
3.41
2.49
1.96
1.59
1.311
1.084
.891
.720
.553
5.47
3.28
2.42
1.92
1.56
1.286
1.064
.874
.703
.535
.08
5.08
3.17
2.36
1.87
1.53
1.262
1.043
.856
.687
.516
.09
4.76
3.06
2.30
1.84
1.50
1.238
1.023
.838
.670
.496
Table 7-U. Values of K' for Circular Channels in the Formula
Q = — dns'A n
D - depth of water d - diameter of channel
D
d .00 1 .01 .02 .03 .04 .05 .06 .07 .08 .09
.0
.1
.2
.3
.4
.00967
.0406
.0907
.1561
.00007
.0118
.0448
.0966
.1633
.00031
.0142
.0492
.1027
.1705
.00074
.0167
.0537
.1089
.1779
.00138
.0195
.0585
.1153
.1854
.00222
.0225
.0634
.1218
.1929
.00328
.02^7
.0686
.1284
.2005
.00455
.0291
.0738
.1352
.2082
.00604
.0327
.0793
.1420
.2160
.00775
.0366
.0849
.1490
.2238
,•5
.6
.7
.8
.9
.232
.311
.388
.453
.494
.239
.319
.395
.458
.496
.247
.327
.402
.463
.497
.255
.335
.409
.468
.498
.263
.343
.416
.473
.498
.271
.350
.422
.477
498
.279
.358
.429
.481
.496
.287
.366
.435'
.485
.494
.295
.373
.441
.488
.489
.303
.380
.447
.491
.483
1.0 463
STEADY UNIFORM FLOW IN OPEN CHANNELS 7-65
Table 7-15. Values of K for Parabolic Channels in the Formula
n
D - depth of water T = top width of channel
D
T .00 .01 .02 .03 .04 .05 .06 .07 .08 .09
.0 75.59 37.77 25.16 18.85 15.05 12.52 10.71 9.35 8.28
.1 7.43 0.73 6.16 5.65 5.23 4.86 4.53 4.24 3.99 3.76
.2 3.55 3.36 3.19 3.04 2.89 2.7C 2.U4 2.52 2.42 2.32
.3 2.226 2.140 2.059 1.984 1.912 1.845 1.782 1.722 1.665 1.611
.4 1.660 1.511 1.465 1.421 1.379 1.339 1.301 1.265 1.230 1.197
.6 1.165 1.134 1.105 1.077 1.050 1.024 .999 .975 .952 .929
.6 .908 .887 .867 .848 .829 .811 .794 .777 .761 .745
,7 .730 .715 .701 .687 .674 .661 .648 .636 .624 .613
.8
.9
.601 .590 .680 .570 .560 .550 .540 .631 .522 .614 .8
.9 .505 .497 .489 .481 .473 .466 .458 .451 .444 .438
1.0 .431
Table 7-16. Values of K' for Parabolic Channels in the Formula
Q = — TWi n
D - depth of water T = top width of channel
D
T .00 .01 .02 .03 .04 .06
.0 .00035 .00111 .00219 .00363 .00511
.1 .0160 .0187 .0215 .0245 .0276 .0308
.2 .0486 .0524 .0563 .0603 .0643 .0684
.3 .0898 .0942 .0987 .1032 .1077 .1123
.4 .1355 .1402 .1450 .1497 .1545 .1593
.5 .183 .188 .193 .198 .203 ,208
.6 .232 .237 .242 ,247 .252 .257
.7 .282 .287 .292 .297 .302 .307
.8 .332 .337 .342 .347 .352 .357
.9 .381 .386 .391 .396 .401 .406
1.0 .431
.06
00691
0342
.0726
1168
1841
,213
,262
.312
.361
.411
.07
00891
,0376
.0768
.1215
.1689
.218
.267
.317
.366
.416
.08
OHIO
0412
.0811
.1261
1737
223
272
322
371
.421
.09
01347
.0448
0854
,1308
.1786
.228
.277
,327
!376
.426