Bushfire Management Report

                           Ecological Natural Area Management

Patch and corridor filtering
Leonard et al (2014) specify a filtering process to
remove or downgrade hazard levels of small
patches and narrow corridors of hazardous
vegetation as fire-line intensity in these small
patches is unlikely to reach the level predicted for
large contiguous patches of vegetation (Leonard
et al (2014), page 5). Using the map below, patch
and corridor filtering was conducted.




                                                                 Figure 9: Map of vegetation patches used for
                                                                 assessment of patch and corridor filtering


Patch filtering tabulation
Patch      Initial class            Merge class               Reason for merge                                Potential load
Patch 1    Moist to dry eucalypt    Moist to dry eucalypt     No merge as patch is large. Remains as            24.1 t/ha
           open forests on          open forests on           Moist to dry eucalypt open forests on
           coastal lowlands         coastal lowlands          coastal lowlands and ranges
Patch 2    Low grass or tree        Moist to dry eucalypt     Allocated to Moist to dry eucalypt open           24.1 t/ha
           cover in rural areas     open forests on           forests on coastal lowlands through the
                                    coastal lowlands          “filtering process to remove or downgrade
                                                              hazard levels of vegetation less than 100m
                                                              wide through patch erosion and
                                                              dilation...allocating it to the class most
                                                              common to the patch boundary (Leonard et
                                                              al, 2014), page 5.
Patch 3    Low grass or tree        Low grass or tree         No merge as patch is large. Remains as              5 t/ha
           cover in rural areas     cover in rural areas      Low grass or tree cover in rural areas
Patch 4    Moist to dry eucalypt    Low grass or tree         Allocated to Low grass or tree cover in rural       5 t/ha
           open forests on          cover in rural areas      areas through the “filtering process
           coastal lowlands
Patch 5    Low grass or tree        Low grass or tree         No merge as patch is large. Remains as              5 t/ha
           cover in rural areas     cover in rural areas      Low grass or tree cover in rural areas
Patch 6    Moist to dry eucalypt    Moist to dry eucalypt     No merge as patch is large. Remains as            24.1 t/ha
           open forests on          open forests on           Moist to dry eucalypt open forests on
           coastal lowlands         coastal lowlands          coastal lowlands and ranges




Bushfire Risk Assessment and Management Plan for a house at 26 Little Springs Lane, Lake MacDonald              February 2021

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