|
MSE 24-hr 3 10-Year Rainfall=4.26"24021_Idyllvale_PR
<br /> Printed 10/23/2024Prepared by Civil Methods, Inc.
<br />Page 11HydroCAD® 10.10-5a s/n 07283 © 2020 HydroCAD Software Solutions LLC
<br />Summary for Subcatchment P1: Proposed to Basin
<br />Runoff =12.80 cfs @ 12.27 hrs, Volume=0.969 af, Depth= 2.18"
<br />Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-96.00 hrs, dt= 0.01 hrs
<br />MSE 24-hr 3 10-Year Rainfall=4.26"
<br />Area (ac) CN Description
<br />*1.429 98
<br />0.344 74 >75% Grass cover, Good, HSG C
<br />3.556 70 Woods, Good, HSG C
<br />5.329 78 Weighted Average
<br />3.900 70 73.18% Pervious Area
<br />1.429 98 26.82% Impervious Area
<br />Tc Length Slope Velocity Capacity Description
<br />(min) (feet)(ft/ft) (ft/sec)(cfs)
<br />10.4 100 0.0200 0.16 Sheet Flow,
<br />Grass: Short n= 0.150 P2= 2.86"
<br />7.3 650 0.0880 1.48 Shallow Concentrated Flow,
<br />Woodland Kv= 5.0 fps
<br />17.7 750 Total
<br />Summary for Subcatchment P2: Proposed to Basin
<br />Runoff =2.00 cfs @ 12.15 hrs, Volume=0.107 af, Depth= 2.63"
<br />Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-96.00 hrs, dt= 0.01 hrs
<br />MSE 24-hr 3 10-Year Rainfall=4.26"
<br />Area (ac) CN Description
<br />*0.184 98
<br />0.304 74 >75% Grass cover, Good, HSG C
<br />0.488 83 Weighted Average
<br />0.304 74 62.30% Pervious Area
<br />0.184 98 37.70% Impervious Area
<br />Tc Length Slope Velocity Capacity Description
<br />(min) (feet)(ft/ft) (ft/sec)(cfs)
<br />8.0 Direct Entry,
<br />Summary for Subcatchment P2A: Direct
<br />Runoff =6.37 cfs @ 12.20 hrs, Volume=0.378 af, Depth= 1.55"
<br />Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-96.00 hrs, dt= 0.01 hrs
<br />MSE 24-hr 3 10-Year Rainfall=4.26"
<br />MSE 24-hr 3 10-Year Rainfall=4.26"24021_Idyllvale_PR
<br /> Printed 10/23/2024Prepared by Civil Methods, Inc.
<br />Page 12HydroCAD® 10.10-5a s/n 07283 © 2020 HydroCAD Software Solutions LLC
<br />Area (ac) CN Description
<br />*0.054 98
<br />2.869 70 Woods, Good, HSG C
<br />2.923 71 Weighted Average
<br />2.869 70 98.15% Pervious Area
<br />0.054 98 1.85% Impervious Area
<br />Tc Length Slope Velocity Capacity Description
<br />(min) (feet)(ft/ft) (ft/sec)(cfs)
<br />12.0 Direct Entry,
<br />Summary for Subcatchment P3: Proposed to Basin
<br />Runoff =2.76 cfs @ 12.15 hrs, Volume=0.142 af, Depth= 2.19"
<br />Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-96.00 hrs, dt= 0.01 hrs
<br />MSE 24-hr 3 10-Year Rainfall=4.26"
<br />Area (ac) CN Description
<br />*0.140 98
<br />0.638 74 >75% Grass cover, Good, HSG C
<br />0.778 78 Weighted Average
<br />0.638 74 82.01% Pervious Area
<br />0.140 98 17.99% Impervious Area
<br />Tc Length Slope Velocity Capacity Description
<br />(min) (feet)(ft/ft) (ft/sec)(cfs)
<br />8.0 Direct Entry,
<br />Summary for Subcatchment P3A: Proposed to Basin
<br />Runoff =1.23 cfs @ 12.15 hrs, Volume=0.064 af, Depth= 2.28"
<br />Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-96.00 hrs, dt= 0.01 hrs
<br />MSE 24-hr 3 10-Year Rainfall=4.26"
<br />Area (ac) CN Description
<br />*0.073 98
<br />0.263 74 >75% Grass cover, Good, HSG C
<br />0.336 79 Weighted Average
<br />0.263 74 78.27% Pervious Area
<br />0.073 98 21.73% Impervious Area
<br />Tc Length Slope Velocity Capacity Description
<br />(min) (feet)(ft/ft) (ft/sec)(cfs)
<br />8.0 Direct Entry,
<br />163
|