Original source · versioned page text
Revised SWMP
Attached to the e-mail RAL23_0002 - LATE Response to Information Request - 35 Pavilion Street_ Pomona.
Site Catchment Areas for DRAINS Modelling
Project number: 20220217 Calculations: B. Parry
Street Address: 35 Pavillion St
Locality: Pomona, NSC Date: 5/09/2022
Existing Site
Existing Site Directly connected (m²) Indirectly connected (m²)
35 Pavillion St Roof 431.7 431.7 -
Impervious Ground 99.4 - 99.4
Driveway 205.6 - 205.6
Total Imp 736.7 431.7 305.0
Total Per 1,838.0 - 1,838.0
Site Area 2,574.7 431.7 305.0
% impervious Effective DCIA = 75% DCIA ICIA +25% ineffective DCIA
323.8 412.9
Impervious 28.6% 12.6% 16.0%
Pervious 71.4%
Proposed Site
Assume Low Density Urban Residential - 40% impervious (QUDM Table 4.5.1.)
2 Lots
Proposed Directly connected (m²) Indirectly connected (m²)
35 Pavillion St Roof (70%) 720.9 720.9 -
Impervious Ground (10%) 103.0 - 103.0
Driveway (20%) 206.0 - 206.0
Total Imp 1,029.9 720.9 309.0
Total Per 1,544.8 - 1,544.8
Site Area 2,574.7 720.9 1,853.8
% impervious Effective DCIA = 75% DCIA ICIA +25% ineffective DCIA
540.7 489.2
Impervious 40.0% 21.0% 19.0%
Pervious 60.0%
See the original
The page text is free to read. Viewing or downloading an original file needs an account.
Log in to see the originalLog in to download the original file
The download may take up to a minute.