Swmp

65-67 Elanda Street, Sunshine Beach
Site Based Stormwater Management Plan
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Indicative location of the detention tank can be found in Appendix E. Flow hydrographs and
the water levels inside the tank of each detention tank for various AEPs are obtained through
the XPSTORM model. The results are presented in Appendix F.

Table 3.6 lists the key parameters of the above-ground detention tank.

Table 3.6 Specification of each roof water detention tank

                                                             Tank base area (m²)                  3.795 (1.15 x
               Underground Detention tank




                                                                                                      3.30)
                                                           Tank internal height (m)                   2.02
                                                              Tank Volume (m3)                        7.67
                                                 First orifice Invert RL from ground level (mm)        10
                                                          First orifice diameter (mm)                  40
                                                Second orifice Invert RL from ground level (mm)       1000
                                                         Second orifice diameter (mm)                  50
                                                        Tank outlet pipe diameter (mm)                150



A schematic plot is presented in Figure 3.3, the location of the orifices are illustrated.




                                            Figure 3.3 Illustration of the proposed 7 KL detention tank



File Name:                                  WCD-22936 – 65-67 Elanda_SWMP.docx
Revision:                                   A                                                                     15