HomeMy WebLinkAboutCopy of infiltrator designStorm Water Retention, JSM Construction Apartment Complex, Rexburg, ID
Given
Storm Intensity (in/hr)
Percolation rate (in/hr)
Dome System Volume per unit (ft^3)
Piping Length (ft)
Piping Diameter (in)
Dome Trench Length (ft)
Dome Trench Width (ft)
Dome Trench Height (ft)
Trench surface area
Area 1
Description
Roof area (ft^2)
Calculated 1-hr volume (ft^3)
Retention area (ft^2)
Calculated average depression depth (in)
Area 2
Description
Roof area (ft^2)
Calculated 1-hr volume (ft^3)
Retention area (ft^2)
Calculated average depression depth (in)
Area 3
Description
Roof area (ft^2)
Calculated 1-hr volume (ft^3)
Retention area (ft^2)
Calculated average depression depth (in)
Area 4
Description
Roof area (ft^2)
Pavement Area (ft^2)
Calculated 1-hr volume (ft^3)
Calculated Piping Storage Volume
Calculated 1-hr volume minus piping storage (ft^3)
Calculated 1-hr infiltration /dome (ft^3)
Calculated Number of Domes Required
0.9
2
88.4
260
6
8
6
4.5
174
1/2 of roof area on one side of one 11-plex
To be retained in grassy area behind this 11-plex
2520
189
840
2.7
1/2 of roof area on both 11-plex buildings
To be retained in grassy area between buildings
5040
378
1560
2.90769230769231
1/2 of 12-plex roof (same at both ends)
To be retained in grassy areas @ building ends
2520
189
900
2.52
Paved Areas plus 1/2 of one 11-plex roof
To be retained in infiltrator systems
2520
15800
1374
204.1
1169.9
29
9.96507666098807
Where: Nd =Required Number of Domes
Vr = Volume of water from runoff
Vd = Volume available per dome
Vi = 1-hr Volume of water infiltrated per dome
Solving for Nd: