HomeMy WebLinkAboutTract Map 3552 Lot 8 Hydrology & Hydraulics
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HYDROLOGY AND HYDRAULICS REPORT
FOR
Tract 3552
C.U.P. No.
PREPARED FOR:
Rancho Community Church
29141 Vallejo Avenue
Temecula, CA 92592
PREPARED By:
TEe
TJEMJE<CUJLA
JENGJINJEJERJING
<CONSUJLTANTS
43180 BUSINESS PARK DRIVE, STE. 103
TEMECULA, CALIFORNIA 92590
TEL: 909.676.1018
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Section
Page
Design Run-off, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Site location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-5
Hydrology Calculations ..................................... 6-11
Hydraulic Calculations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 12-13
Attachments:
40' scale Conceptual Grading Plan (incl. channel design)
200' scale Hydrology Map
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Design Run-off
Method of computing run-off:
Used rational method per Riverside County Flood Control and Water Conservation District
manual where Q = CIA
10 and 100 year frequency was calculated.
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VICINITY MAP
N. T.S.
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Riverside County Rational Hydrology Program
CIVILCADD/CIVILDESIGN Engineering Software, (c) 1992
Rational Hydrology Study Date: 11/ 5/96
version 3.2
------------------------------------------------------------------------
Rancho Community Church
Q100 for Lot 8
------------------------------------------------------------------------
*********
Hydrology Study Control Information '**********
------------------------------------------------------------------------
Rational Method Hydrology Program based on
Riverside County Flood Control & Water Conservation District
1978 hydrology manual
Storm event (year) = 100.00 Antecedent Moisture Condition = 3
Standard intensity-duration curves data (Plate D-4.1)
For the [ Murrieta,Tmc,Rnch CaNorco ] area used.
10 year storm 10 minute intensity = 2.360 (in./hr.)
10 year storm 60 minute intensity = 0.880 (in./hr.)
100 year storm 10 minute intensity = 3.480 (in./hr.)
100 year storm 60 minute intensity = 1.300 (in./hr.)
storm event year = 100.0
,Calculated rainfall intensity data:
1 hour intensity = 1.300 (in./hr.)
Slope of intensity duration curve = 0.5500
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from point/station 10.000 to Point/station 20.000
**** INITIAL AREA EVALUATION ****
Initial area flow distance = l200.000(Ft.)
Top (of initial area) elevation = 1254.000(Ft.)
Bottom (of initial area) elevation = 1203.500(Ft.)
Difference in elevation = 50.500(Ft.)
Slope = 0.04208 s(percent)= 4.21
TC = k(0.390)*[(length^3)/(elevation change)]^0.2
Initial area time of concentration = 12.529 min.
Rainfall intensity = 3.077(In/Hr) for a 100.0 year storm
SINGLE FAMILY (1/4 Acre Lot)
Runoff Coefficient = 0.846
Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 75.92
Pervious area fraction = 0.500; Impervious fraction = 0.500
Initial subarea runoff = 32.781(CFS)
Total initial stream area = 12.600(Ac.)
Pervious area fraction = 0.500
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++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from point/station 5.000 to Point/station 20.000
**** SUBAREA FLOW ADDITION ****
SINGLE FAMILY (1/4 Acre Lot)
Runoff Coefficient = 0.846
Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 75.92
Pervious area fraction = 0.500; Impervious fraction = 0.500
Time of concentration = 12.53 min.
Rainfall intensity = 3.077(In/Hr) for a 100.0 year storm
Subarea runoff = 65.041(CFS) for 25.000(Ac.)
Total runoff = 97.822(CFS) Total area = 37.600(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from point/station 20.000 to point/station 30.000
**** NATURAL CHANNEL TIME + SUBAREA FLOW ADDITION ****
Top of natural channel elevation = 1203.500(Ft.)
End of natural channel elevation = 1113.000(Ft.)
Length of natural channel = 2150.000(Ft.)
Estimated mean flow rate at midpoint of channel =
272.653(CFS)
Natural valley channel type used
L.A. County flood control district formula for channel velocity:
Velocity = (7 + 8(q^.352) (slope^0.5)
Velocity using mean channel flow = 13.25(Ft/s)
Correction to map slope used on extremely rugged channels with
drops and waterfalls (Plate D-6.2)
Normal channel slope = 0.0421
Corrected/adjusted channel slope = 0.0421
Travel time = 2.70 min. TC = 15.23 min.
Adding area flow to channel
UNDEVELOPED (fair cover) subarea
Runoff Coefficient = 0.830
Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 85.03
Pervious area fraction = 1.000; Impervious fraction = 0.000
Rainfall intensity = 2.763(In/Hr) for a 100.0 year storm
Subarea runoff = 308.057(CFS) for 134.400(Ac.)
Total runoff = 405.879(CFS) Total area = 172.000(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from point/station 40.000 to Point/station 30.000
**** SUBAREA FLOW ADDITION ****
UNDEVELOPED (fair cover) subarea
Runoff Coefficient = 0.830
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Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 85.03
Pervious area fraction = 1.000; Impervious fraction = 0.000
Time of concentration = 15.23 min.
Rainfall intensity = 2.763(In/Hr) for a 100.0 year storm
Subarea runoff = 183.367(CFS) for 80.000(Ac.)
Total runoff = 589.246(CFS) Total area = 252.000(AC.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from Point/station 30.000 to Point/station 50.000
**** SUBAREA FLOW ADDITION ****
UNDEVELOPED (fair cover) subarea
Runoff Coefficient = 0.830
Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 85.03
Pervious area fraction = 1.000; Impervious fraction = 0.000
Time of concentration = 15.23 min.
Rainfall intensity = 2.763(In/Hr) for a 100.0 year storm
Subarea runoff = 153.341(CFS) for 66.900(Ac.)
Total runoff = 742.587(CFS) Total area = 318.900(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from point/station 60.000 to Point/station 50.000
**** NATURAL CHANNEL TIME + SUBAREA FLOW ADDITION ****
Top of natural channel elevation = 1246.000(Ft.)
End of natural channel elevation = 1058.000(Ft.)
Length of natural channel = 3000.000(Ft.)
Estimated mean flow rate at midpoint of channel =
789.275(CFS)
Natural valley channel type used
L.A. County flood control district formula for channel velocity:
Velocity = (7 + 8(q^.352) (slope^0.5)
Velocity using mean channel flow = 22.71(Ft/s)
Correction to map slope used on extremely rugged channels with
drops and waterfalls (Plate D-6.2)
Normal channel slope = 0.0627
corrected/adjusted channel slope = 0.0627
Travel time = 2.20 min. TC = 17.43 min.
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Adding area flow to channel
SINGLE FAMILY (1/2 Acre Lot)
Runoff Coefficient = 0.846
Decimal fraction soil group A = 0.000
Decimal fraction soil group B = 0.500
Decimal fraction soil group C = 0.000
Decimal fraction soil group D = 0.500
RI index for soil(AMC 3) = 82.30
Pervious area fraction = 0.600; Impervious fraction = 0.400
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Rainfall intensity =
Subarea runoff =
Total runoff =
2.565(In/Hr) for a 100.0 year storm
87.001(CFS) for 40.100(Ac.)
829.588(CFS) Total area = 359.000(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from point/Station 50.000 to point/Station 70.000
**** NATURAL CHANNEL TIME + SUBAREA FLOW ADDITION ****
Top of natural channel elevation = 1058.000(Ft.)
End of natural channel elevation = 1017.000(Ft.)
Length of natural channel = 2000.000(Ft.)
Estimated mean flow rate at midpoint of channel =
850.732(CFS)
Natural valley channel type used
L.A. County flood control district formula for channel velocity:
Velocity = (7 + 8(q^.352) (slope^0.5)
Velocity using mean channel flow = 13.31(Ft/s)
Correction to map slope used on extremely rugged channels with
drops and waterfalls (Plate D-6.2)
Normal channel slope = 0.0205
Corrected/adjusted channel slope = 0.0205
Travel time = 2.50 min. TC = 19.94 min.
Adding area flow to channel
SINGLE FAMILY (1 Acre Lot)
Runoff Coefficient = 0.791
Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 75.92
Pervious area fraction = 0.800; Impervious fraction = 0.200
Rainfall intensity = 2.383(In/Hr) for a 100.0 year storm
Subarea runoff = 34.514(CFS) for 18.300(Ac.)
Total runoff = 864.102(CFS) Total area = 377.300(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from point/station 80.000 to Point/station 70.000
**** SUBAREA FLOW ADDITION ****
UNDEVELOPED (fair cover) subarea
Runoff Coefficient = 0.819
Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 85.03
Pervious area fraction = 1.000; Impervious fraction = 0.000
Time of concentration = 19.94 min.
Rainfall intensity = 2.383(In/Hr) for a 100.0 year storm
Subarea runoff = 307.874(CFS) for 157.700(Ac.)
Total runoff = 1171.976(CFS) Total area = 535.000(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process 'from Point/station 70.000 to Point/station 90.000'
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**** NATURAL CHANNEL TIME + SUBAREA FLOW ADDITION ****
Top of natural channel elevation = 1017.000(Ft.)
End of natural channel elevation = 1010.000(Ft.)
Length of natural channel = 720.000(Ft.)
Estimated mean flow rate at midpoint of channel = 1227.289(CFS)
Natural valley channel type used
L.A. County flood control district formula for channel velocity:
Velocity = (7 + 8(q^.352) (slope^0.5)
Velocity using mean channel flow = 10.33(Ft/s)
Correction to map slope used on extremely rugged channels with
drops and waterfalls (Plate D-6.2)
Normal channel slope = 0.0097
Corrected/adjusted channel slope = 0.0097
Travel time = 1.16 min. TC = 21.10 min.
Adding area flow to channel
SINGLE FAMILY (1 Acre Lot)
Runoff Coefficient = 0.789
Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 75.92
Pervious area fraction = 0.800; Impervious fraction = 0.200
Rainfall intensity = 2.?10(In/Hr) for a 100.0 year storm
Subarea runoff = 91.985(CFS) for 50.500(Ac.)
Total runoff = 1263.962(CFS) Total area = 585.500(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from Point/station 90.000 to point/station 100.000
**** NATURAL CHANNEL TIME + SUBAREA FLOW ADDITION ****
Top of natural channel elevation = 1010.000(Ft.)
End of natural channel elevation = 1007.500(Ft.)
Length of natural channel = 730.000(Ft.)
Estimated mean flow rate at midpoint of channel = 1314.261(CFS)
Natural valley channel type used
L.A. County flood control district formula for channel velocity:
Velocity = (7 + 8(q^.352) (slope^0.5)
Velocity using mean channel flow = 6.27(Ft/s)
Correction to map slope used on extremely rugged channels with
drops and waterfalls (Plate D-6.2) ,-
Normal channel slope = 0.0034
Corrected/adjusted channel slope = 0.0034
Travel time = 1.94 min. TC = 23.04 min.
Adding area flow to channel
SINGLE FAMILY (1 Acre Lot)
Runoff Coefficient = 0.784
Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
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Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 75.92
Pervious area fraction = 0.800; Impervious fraction = 0.200
Rainfall intensity = 2.201(In/Hr) for a 100.0 year storm
Subarea runoff = 80.399(CFS) for 46.600(Ac.)
Total runoff = 1344.361(CFS) Total area = 632.100(Ac.)
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Process from Point/Station 100.000 to Point/Station 110.000
**** NATURAL CHANNEL TIME + SUBAREA FLOW ADDITION ****
Top of natural channel elevation = 1007.500(Ft.)
End of natural channel elevation = 1002.500(Ft.)
Length of natural channel = 470.000(Ft.)
Estimated mean flow rate at midpoint of channel = 1377.220(CFS)
Natural valley channel type used
L.A. County flood control district formula for channel velocity:
Velocity = (7 + 8(q^.352) (slope^0.5)
Velocity using mean channel flow = 11.23(Ft/s)
Correction to map slope used on extremely rugged channels with
drops and waterfalls (Plate D-6.2)
Normal channel slope = 0.0106
Corrected/adjusted channel slope = 0.0106
Travel time = 0.70 min. TC = 23.74 min.
Adding area flow to channel
SINGLE FAMILY (1 Acre Lot)
Runoff Coefficient = 0.782
Decimal fraction soil group A = 0.050
Decimal fraction soil group B = 0.750
Decimal fraction soil group C = 0.200
Decimal fraction soil group D = 0.000
RI index for soil(AMC 3) = 75.92
Pervious area fraction = 0.800; Impervious fraction = 0.200
Rainfall intensity = 2.165(In/Hr) for a 100.0 year storm
Subarea runoff = 52.337(CFS) for 30.900(Ac.)
Total runoff = 1396.698(CFS) Total area = 663.000(Ac.)
End of computations, total study area 663.00 (Ae.)
The following figures may
be used for a unit hydrograph study of the same area.
Area averaged pervious area fraction(Ap) = 0.903
Area averaged RI index number = 66.3
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T.E.C. Temecula Engineering Consultants
Land Planning, Civil Engineering, construction Consultants
43180 Business Park Drive, suite 103
Temecula, California 92590
Tel: (909)676-1018 Fax: (909)676-2294
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1<-------( 10.00')--------->\
* * * * * * * * * *
* *- -Bulk Depth 5.00')- -* *
* * * *
* *^^Water Surface ( 3.34')^^* *
* * * *
* * * *
* * * *
* * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * *
Rectangular open Channel
------------------------
Flowrate ..................
Velocity ..................
Depth of Flow.............
critical Depth.............
Bulk Depth ................
Total Depth ...............
Base width ................
Slope of Channel..........
X-sectional Area ..........
Wetted Perimeter ..........
AR^ (2/3) ..................
Mannings ' n' ..............
698.400
20.934
3.336
5.331
5.004
5.004
10.000
1. 330
33.363
16.673
52.979
0.013
Existing Concrete Double Box under Vallejo Avenue
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CFS
fps
feet
feet
feet
feet
feet
%
sq. ft.
feet
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T.E.C. Temecula Engineering Consultants
Land Planning, civil Engineering, Construction Consultants
43180 Business Park Drive, suite 103
Temecula, California 92590
Tel:(909)676-1018 Fax: (909)676-2294
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
******** ********
*** ***
*** 1<-------------( 34.99')-------------->1 ***
***^^^^^^^^ Water Depth ( 5.75')^^^^^^^^***
*** ***
*** ***
*** ***
***1<-----( 12.00')---->1***
************************
********************
Trapezoidal Channel
Trapezoidal Channel
Flowrate ..................
Velocity ..................
Depth of Flow.............
critical Depth ............
Freeboard .................
Total Depth ...............
width at Water Surface ....
Top Width .................
Slope of Channel..........
Left Side Slope ...........
Right Side Slope ..........
Base width ................
x-sectional Area ..........
wetted Perimeter ..........
AR^ (2/3) ..................
Mannings 'n' ..............
1,400.000
10.370
5.747
5.535
0.000
5.747
34.986
34.986
0.800
2.000
2.00.Q
12.000
135.004
37.699
316.000
0.030
Proposed Channel w/Rip-Rap
CFS
fps
feet
feet
feet
feet
feet
feet
%
: 1
: 1
feet
sq. ft.
feet
13
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