HomeMy WebLinkAboutParcel Map 31317 Hydrology Studyf1\/IL ENGINARS
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12188 Humboldt Place - Chino. CA 91710-2012
Ph: 909.465.0470 - Fax: 909.465.0674
Lncivil®earlhlink.net
HYDROLOGY STUDY
Project name and address: N.W-C Pala Road & Loma Linda Road
City of Temecula, California.
Design data: Soils group BC (use C for this project)
100 yr. frequency design storm
References: County of Riverside,
Hydrology Manual
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CIVIL ENGINEER:
DATE: 3�Z 6 Q3
R.C.E N0. 46771 EXP. DATE: June 30, 2003
HYDROLOGY STUDY (Determine run-off for sub -areas)
Use 100 year storm frequency with soil group C
For small area, use time concentration Tc = 5 minuntes
Rainfall intensity I= 5.10 in/hr (Plate D-4.1)
Use run-off coefficient C = 0.90 for parking lot
C= 0.85 for residence areas
C= 0.80 for landscape areas
Run-off Q = CIA
• Area Al (1.04 acres)
Area A5 (0.34 acre)
Q=0.85 x5.1 x 1.04 = 4.51 cfs
Q = 0.90 x 5.1 x 0.34 = 1.56 cfs
• Area A2 (0.87 acre)
Area A6 (1.47 acres)
0=0.85x5.1 x 0.87 = 3.77 cfs
Q=0.85x5.1 x1.47=6.37cfs
• Area A3 (0.56 acre)
Area A7 (0.34 acre)
Q=0.85x5.1 x 0.56 = 2.42 cfs
Q=0.85x5.1 x0.34=1.47cfs
• Area A4 (0.31 acre)
Area A8 (0.34 acre)
Q = 0.85 x 5.1 x 0.31 = 1.34 cfs
Q = 0.85 x 5.1 x 0.34 = 1.47 cfs
• Area B1 (1.20 acres)
Area B4 (0.32 acre)
Q = 0.90 x 5.1 x 1.20 = 5.51 cfs
Q = 0.80 x 5.1 x 0.32 = 1.31 cfs
• Area B2 (0.24 acre)
Area B5 (0.22 acre)
Q = 0.90 x 5.1 x 0,24 = 1.10 cfs
Q = 0,80 x 5.1 x 0.22 = 0.90 cfs
• Area B3 (0.22 acre)
Area B6 (0.61 acre)
Q = 0.90 x 5.1 x 0.22 = 1.01 cfs
Q = 0.90 x 5.1 x 0.61 = 2.80 cfs
• Area C1 (0.60 acre)
Area C4 (0.68 acre)
Q = 0.85 x 5.1 x 0.60 = 2.60 cfs
Q = 0.80 x 5.1 x 0.68 = 2.77 cfs
• Area C2 (0.61 acre)
Area C5 (0.79 acre)
Q=0.80x5.1x0.61=2.49cfs
Q = 0.80 x 5.1 x 0.79 = 3.22 cfs
• Area C3 (1.07 acres)
Area C6 (0.63 acre)
Q = 0.85 x 5.1 x 1.07 = 4.64 cfs
Q = 0.90 x 5.1 x 0.63 = 2.89 cfs
• Area D1 (1.02 acres)
Area D5 (1.28 acres)
Q = 0.85 x 5.1 x 1.02 = 1.01 cfs
Q = 0.90 x 5.1 x 1.28 = 2.87 cfs
• Area D2 (1.38 acres)
Area D6 (0.87 acre)
Q = 0.90 x 5.1 x 1.38 = 6.33 cfs
Q = 0.90 x 5.1 x 0.87 = 3.99 cfs
• Area D3 (0.46 acre)
Area D7 (1.19 acres)
Q = 0.90 x 5.1 x 0.46 = 2.11 cfs
Q = 0.80 x 5.1 x 1.19 = 4.86 cfs
• Area D4 (0.87 acre)
Q=0.90x5.1 x 0.87 = 3.99 cfs
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LEGEND HYDROLOGIC SOILS GROUP MAP
— SOILS GROUP BOUNDARY FOR
A SOILS GROUP DESIGNATION
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LEGEND HYDROLOGIC SOILS GROUP MAP
— SOILS GROUP BOUNDARY FOR
A SOILS GROUP DESIGNATION
R C F C 81 W C D PECHANGA
I"IYDROLOGY 1\/)A{YUAL 0 FEET 5000
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