Development Application Part 2 - Environmental & Stormwater Management Plans · OPW11/0335

SC:ANLON PR O PER r? GROUP

F-re Management Plan- Per-g01 Beac"
                                                                                               natural Solutions

3.4         VEGETATION

The SPP1/03 nominates 9 different categories of vegetation with varying hazard ratings under
which site vegetation can be classified. Each of these categories and its respective hazard
rating are listed in Table 1.              Considering the proposed development and vegetation to be
retained, the site contains areas of wallum heath (hazard rating 6). The low wet femland
adjacent to the proposed development is considered to be a lesser risk.


TABLE I          SPP1/03 VEGETATION CATEGORIES AND HAZARD RATINGS


      VEGETATION COMMUNITIES                                      FIRE BEHAVIOUR HAZARD                                  SCORE

 Wet sclerophyll forest, tall eucalypts                Infrequent fires under severe conditions, flame                    10
 (>30m), with grass and mixed shrub                    lengths may exceed 40m, floating embers
 understorey.                                          attack structures for 1 hour, radiant heat and
                                                       direct flame are destructive for 30 minutes.
 Paperbark heath and swamps. eucalypt                  Fire intensity depends on fuel accumulation, but                    8
 forest with dry-shrub ladder fuels.                   can be severe, with flame lengths to 20m, spot
                                                       fires frequent across firebreaks, radiant heat
                                                       and direct flame for 15 minutes.
 Grassy eucalypt and acacia forest,                    Fire intensity may be severe with flame lengths                     6
 exotic pine plantations, cypress pine                 to 20m, but less attack from embers.
 forests, wallum heath.
 Native grasslands (ungrazed), open                    Fast moving fires, available to fire annually to 4                  5
 woodlands, cane fields.                               years. Usually no ember attack, radiant heat for
                                                       >10m, duration <2 minutes.
 Intact acacia forests, with light grass to            Fires infrequent usually burn only under severe                     4
 leaf litter, disturbed rainforest.                    conditions, relatively slow fires, usually little
                                                      ember attack.

 Orchards, farmlands, kikuyu pastures.                 Fires very infrequent, slow moving may be                           2
                                                       difficult to extinguish, frequent firebreaks.
 Grazed grasslands, slashed grass.                    Grazing reduces intensity and rate of spread of                      2
                                                      fire, duration <2 minutes.
 Desert lands (sparse fuels), mowed                    Gaps in fuel usually slow fire spread.                              1
 grass.
 Intact rainforest, mangrove forest, intact            Virtually fireproof.                                                0
 riverine rainforest.



3.5         SLOPE
The slopes within each area have been determined using 'Mapview' aerial photography and
topographic layer. Slopes on the site were generally less than 1% and thus the topography is
best described as a plain presenting a low degree of bushfire hazard.


3.6         ASPECT

The site generally has slopes less than 5% and thus aspect does not become a significant
factor that determines bushfire hazard with an SPP rating of 0.




November 2007                                                                                                                  (8)
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