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Stormwater Management Plan
Attached to the e-mail MCU16/0081 Geotechnical report, Landscape Plan, SMP, Traffic report - Email 3 of 3.
Plans and drawings
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A concept drainage layout plan has been included as Appendix A of this report.
4.4 Modelling Results
A node layout plan is included in Appendix C of this report and the resultant peak flow rates are displayed
in Table 4.3 & 4.4.
ARI Design Storm (min) Peak Flow (m3/s)
1 90 0.101
2 60 0.150
5 60 0.208
10 60 0.247
20 60 0.289
50 60 0.335
100 60 0.383
Table 4.3 – Pre-Development Peak Flow Rate Results
3
ARI Design Storm (min) Peak Flow (m /s)
1 60 0.101
2 60 0.118
5 60 0.133
10 60 0.158
20 60 0.249
50 60 0.324
100 60 0.382
Table 4.4 – Post-Development (mitigated) Peak Flow Rate Results
As can be seen in Tables 4.3 & 4.4 the post-development peak flow rates to the existing drainage system
compare well to that of the existing pre-development site discharges. This is due to the large volumes of
on-site detention proposed to be included as part of the development.
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