Enmore Park Plan of Management - Land
Enmore Park Plan of Management - Land Enmore Park Plan of Management - Land
URBAN FORESTRY AUSTRALIA - TREE MANAGEMENT & CONSULTING ARBORICULTURISTSSelf corrected Lean which has naturally corrected to a vertical orientation by the development ofreaction wood.Suppressed In crown class, trees which have been overtopped and whose crown developmentis restricted from above.Taper Relative change in diameter with length; reflects the ability of the stem or branch to evenlydistribute stress along its length.Topping or heading is a pruning practice that results in removal of terminal growth leaving a cutstub end. Topping causes serious damage to the tree.Tree Protection Zone (TPZ), generally the minimum distance from the center of the tree trunkwhere protective fencing or barriers are to be installed to create an exclusion zone. The TPZsurrounding a tree aids the tree’s ability to cope with disturbances associated with constructionworks. Tree protection involves minimising root damage that is caused by activities such asconstruction. Tree protection also reduces the chance of a tree’s decline in health or death andthe possibly damage to structural stability of the tree from root damage.To limit damage to the tree, protection within a specified distance of the tree’s trunk must bemaintained throughout the proposed development works. No excavation, stockpiling of buildingmaterials or the use of machinery is permitted within the TPZ.The methodology adopted by Urban Forestry Australia for determining a tree’s TPZ is based onMatheny & Clark’s guidelines, as modified from the British Standards Institute 1991. It refers tothe optimal tree protection zones for trees of ‘average to excellent vigour’.o All calculations for TPZ’s using the Matheny and Clark guidelines have been converted tometric figures.ooTrees of poor vigour are generally not considered for retention under this guideline.Canopy spreads displayed on the survey are not accurately shown in many cases. Wherea TPZ is displayed as a smaller diameter than the crown dripline, it is to be given that theTPZ is to be extended to the crown dripline.SAFE USEFUL LIFE EXPECTANCY (SULE)In a planning context, the time a tree can expect to be usefully retained is the most importantlong-term consideration. SULE i.e. a system designed to classify trees into a number ofcategories so that information regarding tree retention can be concisely communicated in a nontechnicalmanner.SULE categories are easily verifiable by experienced personnel without great disparity.A tree’s SULE category is the life expectancy of the tree modified first by its age, health,condition, safety and location (to give safe life expectancy); then by economics (i.e. cost ofmaintenance - retaining trees at an excessive management cost is not normally acceptable); andfinally, effects on better trees, and sustained amenity (i.e. establishing a range of age classes in alocal population).SULE assessments are not static but may be modified as dictated by changes in tree health andenvironment. Trees with a short ULE may at present be making a contribution to the landscape,but their value to the local amenity will decrease rapidly towards the end of this period, prior tothem being removed for safety or aesthetic reasons.For details of SULE categories see Appendix B, modified from Barrell 2001.Arboricultural Audit and Assessment– Enmore Park, Marrickville. January, 2008 10 of 42
URBAN FORESTRY AUSTRALIA - TREE MANAGEMENT & CONSULTING ARBORICULTURISTSAPPENDIX BSULE CATEGORIESArboricultural Audit and Assessment– Enmore Park, Marrickville. January, 2008 11 of 42
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URBAN FORESTRY AUSTRALIA - TREE MANAGEMENT & CONSULTING ARBORICULTURISTSAPPENDIX BSULE CATEGORIESArboricultural Audit and Assessment– <strong>Enmore</strong> <strong>Park</strong>, Marrickville. January, 2008 11 <strong>of</strong> 42