Reference Document - MCU24 0155 (As Published)

DCM BUILDING DESIGN

18 SHEARWATER STREET, PEREGIAN BEACH – STORMWATER MANAGEMENT PLAN
Calculated catchment discharges for events from AEP 1% (ARI 100year) to AEP 63.21% (ARI 1year)
events are shown in Table 2 below.



Table 2: Pre Development Catchment Discharges Q

               ARI          AEP(%)          FY          CY          Iy
                                                                    T
                                                                             DISCHARGE (Q)
                                                                 (mm/h)       m3/s       L/s
                       1       63.21             0.80    0.56      125.0      0.0109     10.88
                       2       50.00             0.85    0.60      139.6      0.0129     12.91
                       5       20.00             0.95    0.67      187.2      0.0194     19.35
                      10       10.00             1.00    0.70      219.6      0.0239     23.90
                      20        5.00             1.05    0.74      251.2      0.0287     28.70
                      50        2.00             1.15    0.81      294.4      0.0368     36.84
                     100        1.00             1.20    0.84      327.4      0.0428     42.75


3.3      Post Deve lopmen t
The soft landscaping pervious areas of the proposed allotment configuration are shown below in
Figure 6 below, the total catchment area for the site is 546.5m2 and the total pervious area is 272m2.




Figure 6: Post Development Pervious Area




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