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HomeMy WebLinkAboutWPO202200038 Calculations 2022-09-14 (18)C19S > Existing POA #7 Subcat Reach Aon Llnk 2OS) Post POA #7 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) 1.150 78 (19S) 1.110 79 (20S) 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 19S: Existing POA #7 Runoff Area=1.150 ac 0.00% Impervious Runoff Depth>0.06" Tc=5.0 min CN=78 Runoff=0.04 cfs 0.006 of Subcatchment 20S: Post POA #7 Runoff Area=1.110 ac 0.00% Impervious Runoff Depth>0.07" Tc=5.0 min CN=79 Runoff=0.06 cfs 0.006 of Total Runoff Area = 2.260 ac Runoff Volume = 0.012 of Average Runoff Depth = 0.06" 100.00% Pervious = 2.260 ac 0.00% Impervious = 0.000 ac Breezy Poa's Prepared by HP Inc. Type/1 24-hr 1 inch Rainfall= 1. 00 " Printed 9/6/2022 Summary for Subcatchment 19S: Existing POA #7 [49] Hint: Tc<2dt may require smaller dt Runoff = 0.04 cfs @ 12.02 hrs, Volume= 0.006 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 1.150 78 1.150 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 19S: Existing POA #7 Hydrograph �I■I♦�I■�I■I♦�I■I♦ • -� II II 1 inch IRn Runoff A, Runoff • • . Runoff• • 1 .. . .---.I■-.-.-. MMMMMMMMMMMM 1 II,I■I■I■I♦I■I♦I♦I■EME E---.-OMMM-. 1 M---.-MMMMM. J II,I■I♦I♦I♦.I♦I♦I■I♦I♦I♦ I♦MMMMMMMMM-. MMMMMMMMMM ■I■I■I■ I■ ■I■I■I■I■I■I■I■ IMMMMMMMMMMM ___________ IMMMMMMMMMMI MMMMMMMMMMI \MMMMMMMMMMM I��i/�j�iiiiiiiii��� MM I I MMMMMMMMM MMMMMMM 0,. ,,), ,. ,2 .,3..4,. ,, 5 6,,78 9,.,10„1, ,.1,2„1,3„1,4., 15,. 1'6 1,7„1,8.,1,9„20 21„z....,....4 2 23 24 Time (hours) ■ Rurwff Breezy Poa's Prepared by HP Inc. Type Il 24-hr 1 inch Rainfall= 1. 00 " Printed 9/6/2022 Summary for Subcatchment 20S: Post POA #7 [49] Hint: Tc<2dt may require smaller dt Runoff = 0.06 cfs @ 12.01 hrs, Volume= 0.006 af, Depth> 0.07" 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 1.110 79 1.110 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, 0.065 0.06 0.055 0.05 0.045 0.04 w `. 0.035 3 LL 0.03 0.025 0.02 0.015 0.01 0.005 0 Subcatchment 20S: Post POA #7 Hydrograph e • - , • • • iMOMMOMM■MEN I ■■■■■■■■■■■■ .■.■■■■.■.■. ■■.■■.■.■. ■■.■■.■.■. 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) ■ Rurwff 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 19S: Existing POA #7 Runoff Area=1.150 ac 0.00% Impervious Runoff Depth>1.11" Tc=5.0 min CN=78 Runoff=2.29 cfs 0.106 of Subcatchment 20S: Post POA #7 Runoff Area=1.110 ac 0.00% Impervious Runoff Depth>1.17" Tc=5.0 min CN=79 Runoff=2.33 cfs 0.108 of Total Runoff Area = 2.260 ac Runoff Volume = 0.214 of Average Runoff Depth = 1.14" 100.00% Pervious = 2.260 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 19S: Existing POA #7 [49] Hint: Tc<2dt may require smaller dt Runoff = 2.29 cfs @ 11.96 hrs, Volume= 0.106 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 1.150 78 1.150 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 19S: Existing POA #7 Hydrograph ❑ RunoH 9 1 2 3 4 5 6 7 8 9 19 11 12 13 14 15 16 17 18 19 29 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 20S: Post POA #7 [49] Hint: Tc<2dt may require smaller dt Runoff = 2.33 cfs @ 11.96 hrs, Volume= 0.108 af, Depth> 1.17" 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 1.110 79 1.110 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 20S: Post POA #7 Hydrograph 233 cfs Type II 24-hr 2 1-yr Rainfall=2.97" Runoff Area=1.110 ac Runoff Volume=0.108 of Runoff Depth>1.17" - Tc=5.0 min LL CN=79 9 1 2 3 4 5 6 7 8 9 19 11 12 13 14 15 16 17 18 19 29 21 22 23 24 Time (hours) ❑ RunoH Breezy Poa's Type 1124-hr 2-yr Rainfall=3.59 " Prepared by HP Inc. Printed 9/6/2022 HVdroCAD® 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 19S: Existing POA #7 Runoff Area=1.150 ac 0.00% Impervious Runoff Depth>1.56" Tc=5.0 min CN=78 Runoff=3.25 cfs 0.150 of Subcatchment 20S: Post POA #7 Runoff Area=1.110 ac 0.00% Impervious Runoff Depth>1.63" Tc=5.0 min CN=79 Runoff=3.27 cfs 0.151 of Total Runoff Area = 2.260 ac Runoff Volume = 0.301 of Average Runoff Depth = 1.60" 100.00% Pervious = 2.260 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 19S: Existing POA #7 [49] Hint: Tc<2dt may require smaller dt Runoff = 3.25 cfs @ 11.96 hrs, Volume= 0.150 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 1.150 78 1.150 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 19S: Existing POA #7 Hydrograph ❑ Runoff 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 20S: Post POA #7 [49] Hint: Tc<2dt may require smaller dt Runoff = 3.27 cfs @ 11.96 hrs, Volume= 0.151 af, Depth> 1.63" 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 1.110 79 1.110 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 20S: Post POA #7 Hydrograph ❑ Runoff Time (hours) 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 19S: Existing POA #7 Runoff Area=1.150 ac 0.00% Impervious Runoff Depth>3.08" Tc=5.0 min CN=78 Runoff=6.32 cfs 0.295 of Subcatchment 20S: Post POA #7 Runoff Area=1.110 ac 0.00% Impervious Runoff Depth>3.17" Tc=5.0 min CN=79 Runoff=6.27 cfs 0.293 of Total Runoff Area = 2.260 ac Runoff Volume = 0.588 of Average Runoff Depth = 3.12" 100.00% Pervious = 2.260 ac 0.00% Impervious = 0.000 ac Breezy Poa's Prepared by HP Inc. Type/1 24-hr 10-yr Rainfall=5.43" Printed 9/6/2022 Summary for Subcatchment 19S: Existing POA #7 [49] Hint: Tc<2dt may require smaller dt Runoff = 6.32 cfs @ 11.96 hrs, Volume= 0.295 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 1.150 78 1.150 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 19S: Existing POA #7 Hydrograph ■ Rurwff Time (hours) Breezy Poa's Prepared by HP Inc. Type/1 24-hr 10-yr Rainfall=5.43" Printed 9/6/2022 Summary for Subcatchment 20S: Post POA #7 [49] Hint: Tc<2dt may require smaller dt Runoff = 6.27 cfs @ 11.96 hrs, Volume= 0.293 af, Depth> 3.17" 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 1.110 79 1.110 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Subcatchment 20S: Post POA #7 Hydrograph a 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) i • _ 'Runoff Volume=0.293 a.] Runoff Depth>3.17 111,1111,11, , 111,1111 111'111 I / 1�' , min 111,1111 111„111,11 Al ❑ RunoH