RCFC & WCD RATIONAL METHOD CALCULATION FORM

Size: px

Start display at page:

Download "RCFC & WCD RATIONAL METHOD CALCULATION FORM"

Clarissa Watson
6 years ago
Views:

1 RCFC & WCD RATIONAL METHOD CALCULATION FORM HYDROLOGY MANUAL PROJECT: Tentative Tract Map No Calculated by: TL Group Corp. Date: 7/2/2015 FREQUENCY: EXISTING 2 - YR STORM Checked by: Date: Drainage Area Soil & Development A I C Q Sum of Q SLOPE SECTION V L Tn Sum of T Volume Acres in/hr cfs cfs fps ft min min cf A-1 Undeveloped ' Street Initial Area 3, B-1 Undeveloped " RCP Initial Area 6, C-1 Undeveloped ' Street Initial Area 5, D-1 Undeveloped Initial Area 7, E-1 Undeveloped Initial Area 4, F-1 Undeveloped Initial Area 2, TOTAL , Type AMC Soil Group Ai Area RI Fp F Fm Ap decimal percent Plate E-6.1 inches/hr Fp*(1-0.9*Ai) 0.50*F 1-Ai (F-Fm)/54 A-1 II D B-1 II D C-1 II D D-1 II D E-1 II D F-1 II D C [Ai+((I-Fp)/I)*Ap]

2 RCFC & WCD RATIONAL METHOD CALCULATION FORM HYDROLOGY MANUAL PROJECT: Tentative Tract Map No Calculated by: TL Group Corp. Date: 7/2/2015 FREQUENCY: EXISTING 10 - YR STORM Checked by: Date: Drainage Area Soil & Development A I C Q Sum of Q SLOPE SECTION V L Tn Sum of T Volume Acres in/hr cfs cfs fps ft min min cf A-1 Undeveloped ' Street Initial Area 7, B-1 Undeveloped " RCP Initial Area 15, C-1 Undeveloped ' Street Initial Area 12, D-1 Undeveloped Initial Area 19, E-1 Undeveloped Initial Area 10, F-1 Undeveloped Initial Area 5, TOTAL , Type AMC Soil Group Ai Area RI Fp F Fm Ap decimal percent Plate E-6.1 inches/hr Fp*(1-0.9*Ai) 0.50*F 1-Ai (F-Fm)/54 A-1 II D B-1 II D C-1 II D D-1 II D E-1 II D F-1 II D C 0.9[Ai+((I-Fp)/I)*Ap]

5 RCFC & WCD RATIONAL METHOD CALCULATION FORM HYDROLOGY MANUAL PROJECT: Tentative Tract Map No Calculated by: TL Group Corp. Date: FREQUENCY: PROPOSED 2 - YR STORM Checked by: Date: 7/2/2015 Drainage Area Soil & Development A I C Q Sum of Q SLOPE SECTION V L Tn Sum of T Volume Acres in/hr cfs cfs fps ft min min cf A-1 Single Family Housing ' Street Initial Area 17, A-2 Single Family Housing " RCP " RCP 17, A-3 Single Family Housing ' Street Initial Area 18, B-1 Landscaping Vegetated Swale Initial Area TOTAL , Confluence (Qp) Qa=10.0 cfs, Ta=12, Ia=2.12 in/hr Qb=5.20 cfs, Tb=10.5, Ib=2.27 in/hr Qp = Qa + Qb*(Ia/Ib) Qp = Type AMC Soil Group Ai Area RI Fp F Fm Ap decimal percent Plate E-6.1 inches/hr Fp*(1-0.9*Ai) 0.5*F 1-Ai (F-Fm)/54 A-1 II D A-2 II D A-3 II D B-1 II D C 0.9[Ai+((I-Fp)/I)*Ap]

6 RCFC & WCD RATIONAL METHOD CALCULATION FORM HYDROLOGY MANUAL PROJECT: Tentative Tract Map No Calculated by: TL Group Corp. Date: 7/2/2015 FREQUENCY: PROPOSED 10 - YR STORM Checked by: Date: Drainage Area Soil & Development A I C Q Sum of Q SLOPE SECTION V L Tn Sum of T Volume Acres in/hr cfs cfs fps ft min min cf A-1 Single Family Housing ' Street Initial Area 34, A-2 Single Family Housing " RCP " RCP 34, A-3 Single Family Housing ' Street Initial Area 35, B-1 Landscaping Vegetated Swale Initial Area 1, TOTAL , Confluence (Qp) Qa=10.0 cfs, Ta=12, Ia=2.12 in/hr Qb=5.20 cfs, Tb=10.5, Ib=2.27 in/hr Qp = Qa + Qb*(Ia/Ib) Qp = Type AMC Soil Group Ai Area RI Fp F Fm Ap decimal percent Plate E-6.1 inches/hr Fp*(1-0.9*Ai) 0.5*F 1-Ai (F-Fm)/54 A-1 II D A-2 II D A-3 II D B-1 II D C 0.9[Ai+((I-Fp)/I)*Ap]

Precipitation Frequency Data Server Page 1 of 4 NOAA Atlas 14, Volume 6, Version 2 Location name: Wildomar, California, US* Latitude: 33.5954, Longitude: -117.

Roy, Carl Trypaluk, Dale Unruh, Fenglin Yan, Michael Yekta, Tan Zhao, Geoffrey Bonnin, Daniel Brewer, Li-Chuan Chen, Tye Parzybok, John Yarchoan NOAA, National Weather Service, Silver Spring,

13 Precipitation Frequency Data Server Page 1 of 4 NOAA Atlas 14, Volume 6, Version 2 Location name: Wildomar, California, US* Latitude: , Longitude: Elevation: 1290 ft* * source: Google Maps POINT PRECIPITATION FREQUENCY ESTIMATES Sanja Perica, Sarah Dietz, Sarah Heim, Lillian Hiner, Kazungu Maitaria, Deborah Martin, Sandra Pavlovic, Ishani Roy, Carl Trypaluk, Dale Unruh, Fenglin Yan, Michael Yekta, Tan Zhao, Geoffrey Bonnin, Daniel Brewer, Li-Chuan Chen, Tye Parzybok, John Yarchoan NOAA, National Weather Service, Silver Spring, Maryland PF_tabular PF_graphical Maps_&_aerials Duration 5-min 10-min 15-min 30-min 60-min 2-hr 3-hr 6-hr 12-hr 24-hr 2-day 3-day 4-day 7-day 10-day 20-day 30-day 45-day 60-day PF tabular PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches) 1 Average recurrence interval (years) ( ) ( ) ( ) ( ) ( ) ( ) ( ) 1.03 ( ) 1.36 ( ) 1.79 ( ) 2.15 ( ) 2.32 ( ) 2.49 ( ) 2.84 ( ) 3.02 ( ) 3.61 ( ) 4.24 ( ) 4.93 ( ) 5.66 ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) 1.35 ( ) 1.80 ( ) 2.44 ( ) 3.02 ( ) 3.31 ( ) 3.60 ( ) 4.13 ( ) 4.39 ( ) 5.30 ( ) 6.24 ( ) 7.22 ( ) 8.22 ( ) ( ) ( ) ( ) ( ) ( ) 1.02 ( ) 1.25 ( ) 1.77 ( ) 2.39 ( ) 3.30 ( ) 4.18 ( ) 4.64 ( ) 5.08 ( ) 5.87 ( ) 6.28 ( ) 7.67 ( ) 9.05 ( ) 10.5 ( ) 11.9 ( ) ( ) ( ) ( ) ( ) ( ) 1.22 ( ) 1.50 ( ) 2.11 ( ) 2.87 ( ) 4.00 ( ) 5.12 ( ) 5.74 ( ) 6.31 ( ) 7.34 ( ) 7.87 ( ) 9.70 ( ) 11.5 ( ) 13.3 ( ) 15.2 ( ) ( ) ( ) ( ) ( ) 1.08 ( ) 1.51 ( ) 1.85 ( ) 2.60 ( ) 3.53 ( ) 4.94 ( ) 6.41 ( ) 7.25 ( ) 8.02 ( ) 9.39 ( ) 10.1 ( ) 12.6 ( ) 15.0 ( ) 17.6 ( ) 19.9 ( ) ( ) ( ) ( ) ( ) 1.25 ( ) 1.75 ( ) 2.12 ( ) 2.98 ( ) 4.05 ( ) 5.67 ( ) 7.41 ( ) 8.43 ( ) 9.36 ( ) 11.0 ( ) 11.9 ( ) 15.0 ( ) 17.9 ( ) 21.0 ( ) 23.9 ( ) ( ) ( ) ( ) ( ) 1.43 ( ) 1.98 ( ) 2.41 ( ) 3.37 ( ) 4.57 ( ) 6.41 ( ) 8.43 ( ) 9.65 ( ) 10.8 ( ) 12.7 ( ) 13.8 ( ) 17.5 ( ) 21.0 ( ) 24.8 ( ) 28.3 ( ) 1 Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS) ( ) ( ) ( ) 1.05 ( ) 1.61 ( ) 2.24 ( ) 2.71 ( ) 3.79 ( ) 5.11 ( ) 7.16 ( ) 9.49 ( ) 10.9 ( ) 12.2 ( ) 14.5 ( ) 15.9 ( ) 20.3 ( ) 24.4 ( ) 28.8 ( ) 33.0 ( ) ( ) ( ) ( ) 1.22 ( ) 1.87 ( ) 2.58 ( ) 3.13 ( ) 4.35 ( ) 5.85 ( ) 8.19 ( ) 10.9 ( ) 12.7 ( ) 14.3 ( ) 17.1 ( ) 18.7 ( ) 24.1 ( ) 29.3 ( ) 34.7 ( ) 39.8 ( ) ( ) ( ) ( ) 1.36 ( ) 2.07 ( ) 2.86 ( ) 3.45 ( ) 4.80 ( ) 6.42 ( ) 8.98 ( ) 12.1 ( ) 14.1 ( ) 15.9 ( ) 19.2 ( ) 21.0 ( ) 27.3 ( ) 33.2 ( ) 39.5 ( ) 45.4 ( ) Numbers in parenthesis are PF estimates at lower and upper bounds of the 90% confidence interval. The probability that precipitation frequency estimates (for a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5%. Estimates at upper bounds are not checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PMP values. Please refer to NOAA Atlas 14 document for more information. Back to Top PF graphical 7/11/2015

14 Precipitation Frequency Data Server Page 2 of 4 Back to Top Maps & aerials Small scale terrain Map 50 km data 2015 Google, INEGI 7/11/2015

15 Precipitation Frequency Data Server Page 3 of 4 7/11/ km Map data 2015 Google Large scale map 2 km Map data 2015 Google Large scale aerial Back to Top 2 km Imagery 2015 TerraMetrics US Department of Commerce National Oceanic and Atmospheric Administration National Weather Service Office of Hydrologic Development 1325 East West Highway Silver Spring, MD 20910

16 Precipitation Frequency Data Server Page 4 of 4 7/11/2015 Questions?: HDSC.Questions@noaa.gov Disclaimer

Circular Pipe Flow Project: Wildomar Pipe ID: Outlet Design Information (Input) Pipe Invert Slope So = 0.0200 ft/ft Pipe Manning's n-value n = 0.0130 Pipe Diameter D = 24.

17 Circular Pipe Flow Project: Wildomar Pipe ID: Outlet Design Information (Input) Pipe Invert Slope So = ft/ft Pipe Manning's n-value n = Pipe Diameter D = inches Design discharge Q = 18.9 cfs Full-flow Capacity (Calculated) Full-flow area Af = 3.14 sq ft Full-flow wetted perimeter Pf = 6.28 ft Half Central Angle Theta = 3.14 rad Full-flow capacity Qf = 32.1 cfs Calculation of Normal Flow Condition Half Central Angle (0<Theta<3.14) Theta = 1.68 rad Flow area An = 1.78 sq ft Top width Tn = 1.99 ft Wetted perimeter Pn = 3.35 ft Flow depth Yn = 1.10 ft Flow velocity Vn = fps Discharge Qn = 18.9 cfs Normal Depth Froude Number Fr n = 1.98 Calculation of Critical Flow Condition Half Central Angle (0<Theta-c<3.14) Theta-c = 2.17 rad Critical flow area Ac = 2.64 sq ft Critical top width Tc = 1.65 ft Critical flow depth Yc = 1.56 ft Critical flow velocity Vc = 7.17 fps Critical Depth Froude Number Fr c = 1.00 Outlet-pipe, Pipe 8/3/2015, 9:59 PM

Swale Storage/ Length Between Ditch Blocks

Swale Storage/ Length Between Ditch Blocks Input: Roadway Grade 1.00 % Front Slope 4 :1 Bottom Width 0 ft Back Slope 3 :1 Swale Depth 1.50 ft Calculations: Cross-Sectional Swale Area = 7.88 ft 2 DITCH