2008/0169 Response to information request - 71 Seaview Tce Sunshine Beach · 132008.169

 APPENDIX B


 TREE VOLUME CALCULATOR V1.1

 STEP 1
 PLANTING BED VOLUME (m3)                                                                         4.65
 Planting Bed Cross Sectional Area (m2)                                                           1.55
 Length of Garden Bed per tree (m)                                                                   3

 STEP 2
 VOLUME OF WATER HELD IN SOIL (m3)                                                               0.837
 Volume of Available Soil per Tree (m3)
 Ave Water Holding Capacity (%)*                                                                  0.18


 STEP 3
 ONE DAY VOLUME OF WATER                                                                      0.119571
 Interval of Irrigation or Precipitation#                                                            7
 Evaporation Ratio                                                                                 0.2
 Evaporation Rate                                                                               0.0167
 Nominal Leaf Area Index                                                                             4
 Crown Projection m3                                                                          8.949957
 TREE CANOPY RADIUS (m)                                                                       1.688285


 * based on soil type
 # indicates period in days between rain or irrigation events




Concern was expressed by Council that
the grout injected sand in the vicinity of
the western boundary would provide
insufficient growing media for the
establishment of effective screen                                                                   Select Tree Species
                                                                                                    Sygium leuhmannii
planting.

This issue was investigated and it was
determined that the soil volume
provided in the drawings by TOD
Engineers and the spacing of the trees
at 3m centres along the boundary could                                  to
                                                                        a
support a theoretical tree with a crown                                 Ir
volume of 8.94m3 which equates to a
tree radius of 1.688m.

                                                                                                    Imported Topsoll to
Trees planted at 3m centres could                                                                         AS4419
therefore form interlocking canopies                                                                Cross Section Area
therefore providing an efficient screen to                                                            equals 1.55sqm

the neighbouring premises on lot 5.                             Lot 5

                                                                                                          Slotted 100mm
The calculation was based on the use of                                                                  Agricultural Pipe
loamy soil as per AS4419 and a rain /                                                                      for drainage
irrigation interval of 7 days (once a
week). The driest month in Noosa (Sep)
has a mean number of rainy days of 8.4
days per month. Rainfall for growing of
screen planting could be supplemented
                                                                                                  Footing to
by an irrigation system connected to
                                                                                                  Eng. Spec.
rainwater harvesting tanks to be                                             Grout Injected
provided on site. In this regard the                                         Sand to Eng.
                                                                                 Spec.
adopted rain interval of once per week
is conservative.




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