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HomeMy WebLinkAboutWPO202200038 Calculations 2022-09-14 (16)24S Existing POA #4 25s, Post POA #4 Subcat Reach Aon Llnk Breezy Poa's Prepared by HP Inc. Project Notes Defined 5 rainfall events from Albemarle Rainfall OF Printed 9/6/2022 Breezy Poa's Prepared by HP Inc. Area Listing (selected nodes) Area CN Description (acres) (subcatchment-numbers) 7.950 78 (24S) 7.550 80 (25S) 15.500 79 TOTAL AREA Printed 9/6/2022 Breezy Poa's Type Il 24-hr 1 inch Rainfall= 1. 00 " Prepared by HP Inc. Printed 9/6/2022 HVdroCADO 10.10-7c s/n 08126 © 2022 HVdroCAD Software Solutions LLC Paae 4 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 24S: Existing POA #4 Runoff Area=7.950 ac 0.00% Impervious Runoff Depth>0.06" Tc=8.0 min CN=78 Runoff=0.20 cfs 0.038 of Subcatchment 25S: Post POA #4 Runoff Area=7.550 ac 0.00% Impervious Runoff Depth>0.08" Tc=12.0 min CN=80 Runoff=0.39 cfs 0.052 of Total Runoff Area = 15.500 ac Runoff Volume = 0.091 of Average Runoff Depth = 0.07" 100.00% Pervious = 15.500 ac 0.00% Impervious = 0.000 ac Breezy Poa's Prepared by HP Inc. Type Il 24-hr 1 inch Rainfall= 1. 00 " Printed 9/6/2022 Summary for Subcatchment 245: Existing POA #4 Runoff = 0.20 cfs @ 12.07 hrs, Volume= 0.038 af, Depth> 0.06" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 inch Rainfall=1.00" Area (ac) CN Description 7.950 78 7.950 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 24S: Existing POA #4 Hydrograph ■ Rurwff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Breezy Poa's Prepared by HP Inc. Type Il 24-hr 1 inch Rainfall= 1. 00 " Printed 9/6/2022 Summary for Subcatchment 25S: Post POA #4 Runoff = 0.39 cfs @ 12.10 hrs, Volume= 0.052 af, Depth> 0.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1 inch Rainfall=1.00" Area (ac) CN Description 7.550 80 7.550 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, Subcatchment 25S: Post POA #4 Hydrograph ■ Runofi 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Breezy Poa's Type // 24-hr 1-yr Rainfall=2.97" Prepared by HP Inc. Printed 9/6/2022 HVdroCADO 10.10-7c s/n 08126 © 2022 HVdroCAD Software Solutions LLC Paae 7 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 24S: Existing POA #4 Runoff Area=7.950 ac 0.00% Impervious Runoff Depth>1.11" Tc=8.0 min CN=78 Runoff=14.33 cfs 0.732 of Subcatchment 25S: Post POA #4 Runoff Area=7.550 ac 0.00% Impervious Runoff Depth>1.22" Tc=12.0 min CN=80 Runoff=13.09 cfs 0.770 of Total Runoff Area = 15.500 ac Runoff Volume = 1.502 of Average Runoff Depth = 1.16" 100.00% Pervious = 15.500 ac 0.00% Impervious = 0.000 ac Breezy Poa's Prepared by HP Inc. Type // 24-hr 1-yr Rainfall=2.97" Printed 9/6/2022 Summary for Subcatchment 245: Existing POA #4 Runoff = 14.33 cfs @ 12.00 hrs, Volume= 0.732 af, Depth> 1.11" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr Rainfall=2.97" Area (ac) CN Description 7.950 78 7.950 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 24S: Existing POA #4 Hydrograph ❑ Runoff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Breezy Poa's Prepared by HP Inc. Type // 24-hr 1-yr Rainfall=2.97" Printed 9/6/2022 Summary for Subcatchment 255: Post POA #4 Runoff = 13.09 cfs @ 12.04 hrs, Volume= 0.770 af, Depth> 1.22" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 1-yr Rainfall=2.97" Area (ac) CN Description 7.550 80 7.550 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, 0 LL Subcatchment 25S: Post POA #4 Hydrograph ■■■ W■■■■■■■■■■■ • -A I/ • • ♦ .. IiliJ■■■ I/ ■■■■■■■■■■ ■■■■■■■■■■ MEMEMEMEME ■■■■■■■■■■ ■■■■■■■■■■ ■■■■■■■■■■ , ■■■■■■■■■ .......... ■■■■■■■■ ■■■■■■ME ■■■■■■■■■■ EMOME o . 1 . 2. 3 .4 . 5 . 5 . 7 . a. 9 10 . 11. 12 .73 ..1,4 .15 ..10. 17 ..18 .. 19 .20 21 22 23 24 Time (hours) ■ Rurwff Breezy Poa's Type 1124-hr 2-yr Rainfall=3.59 " Prepared by HP Inc. Printed 9/6/2022 HVdroCADO 10.10-7c s/n 08126 © 2022 HVdroCAD Software Solutions LLC Paoe 10 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 24S: Existing POA #4 Runoff Area=7.950 ac 0.00% Impervious Runoff Depth>1.56" Tc=8.0 min CN=78 Runoff=20.39 cfs 1.036 of Subcatchment 25S: Post POA #4 Runoff Area=7.550 ac 0.00% Impervious Runoff Depth>1.70" Tc=12.0 min CN=80 Runoff=18.31 cfs 1.071 of Total Runoff Area = 15.500 ac Runoff Volume = 2.107 of Average Runoff Depth = 1.63" 100.00% Pervious = 15.500 ac 0.00% Impervious = 0.000 ac Breezy Poa's Prepared by HP Inc. Type 11 24-hr 2-yr Rainfall=3.59" Printed 9/6/2022 Summary for Subcatchment 245: Existing POA #4 Runoff = 20.39 cfs @ 12.00 hrs, Volume= 1.036 af, Depth> 1.56" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2-yr Rainfall=3.59" Area (ac) CN Description 7.950 78 7.950 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 24S: Existing POA #4 Hydrograph ■ Rurwff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Breezy Poa's Prepared by HP Inc. Type 11 24-hr 2-yr Rainfall=3.59" Printed 9/6/2022 Summary for Subcatchment 255: Post POA #4 Runoff = 18.31 cfs @ 12.04 hrs, Volume= 1.071 af, Depth> 1.70" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 2-yr Rainfall=3.59" Area (ac) CN Description 7.550 80 7.550 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, 9 0 1 Subcatchment 25S: Post POA #4 Hydrograph ! Ii ! • 1 �lii� EMMMMMMMMMMM MIMMMMMMMMMMMM MIMMMMMMMMMMMM 1 MI MMMMMMMMMMMM 1 I ■MMMMMMMMMMM MOMM mom MMMMMMMMM MMMMMMMMMM MMMMMMMMMM MMMMMMMMMM MMMMMMMMM. MMMMMMMMMM _I ■ ___________ __�____ MMMMMMMMMMM ■___________ �� ■MM ______ '�2' 3 .4�.�� 55��. �7..8 . �9� 1i0 .1'1.12� 13 �. 1�4 1�5 1iW 1i7.�1819 �. 20 21 22 23 24 Time (hours) ■ Rurwff Breezy Poa's Type // 24-hr 10-yr Rainfall=5.43" Prepared by HP Inc. Printed 9/6/2022 HvdroCADO 10.10-7c s/n 08126 © 2022 HvdroCAD Software Solutions LLC Paoe 13 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 24S: Existing POA #4 Runoff Area=7.950 ac 0.00% Impervious Runoff Depth>3.08" Tc=8.0 min CN=78 Runoff=39.80 cfs 2.037 of Subcatchment 25S: Post POA #4 Runoff Area=7.550 ac 0.00% Impervious Runoff Depth>3.26" Tc=12.0 min CN=80 Runoff=34.82 cfs 2.053 of Total Runoff Area = 15.500 ac Runoff Volume = 4.090 of Average Runoff Depth = 3.17" 100.00% Pervious = 15.500 ac 0.00% Impervious = 0.000 ac Breezy Poa's Prepared by HP Inc. Type II 24-hr 10-yr Rainfall=5.43" Printed 9/6/2022 Summary for Subcatchment 245: Existing POA #4 Runoff = 39.80 cfs @ 11.99 hrs, Volume= 2.037 af, Depth> 3.08" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr Rainfall=5.43" Area (ac) CN Description 7.950 78 7.950 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.0 Direct Entry, Subcatchment 24S: Existing POA #4 Hydrograph ■ Rurwff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours) Breezy Poa's Prepared by HP Inc. Type II 24-hr 10-yr Rainfall=5.43" Printed 9/6/2022 Summary for Subcatchment 255: Post POA #4 Runoff = 34.82 cfs @ 12.04 hrs, Volume= 2.053 af, Depth> 3.26" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type II 24-hr 10-yr Rainfall=5.43" Area (ac) CN Description 7.550 80 7.550 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 12.0 Direct Entry, Subcatchment 25S: Post POA #4 Hydrograph ■ Rurwff 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)