Reference Documents - MCU23 0070

3.5       POST-DEVELOPMENT SITE XP-STORM
3.5.1     CATCHMENT DATA

Table 6 presents the post-development catchment details. Drawing No. M3024E_DA1_SK02 in
Appendix D presents the catchment delineation.

                                  Table 6 – Post-Development Catchment Data
                                                                   Fraction       Vectored Slope
                 Catchment               Area (ha)
                                                                  Impervious           (%)
                     D1                   0.0335                    100%               10%
                     D2                   0.0121                     66%                10%
                     D3                   0.0030                    100%                10%
                    Total                 0.0486                     92%                10%

The following catchment arrangements have been modelled:
     5% AEP from catchment D1 has been modelled to enter the detention tank. Larger flows bypass
      detention.
     1% AEP from catchment D2 has been modelled to enter the detention tank.
     Catchment D3 bypasses the detention tank.

Figure 5 presents the XP-STORM layout for the post-development site.




                                 Figure 5 – Post-Development XP-STORM Layout


3.5.2     RAINFALL DATA, HYDROLOGICAL LOSSES & BX FACTOR

As per the pre-development scenario.




SITE BASED STORMWATER MANAGEMENT PLAN – Revision B                             36 & 38 DUKE STREET, SUNSHINE BEACH
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