estimating height and diameter growth of some street trees in urban green spaces

Estimating urban trees growth, especially tree height is very importantin urban landscape management. the aim of the study was to predict of treeheight base on tree diameter. to achieve this goal, 921 trees from five specieswere measured in five areas of mashhad city in 2014. the evaluated treeswere ash tree (fraxinusspecies), plane tree (platanus hybrida), white mulberry(morus alba), ailanthustree (ailanthus altissima) and false acacia tree (robiniapseudoacacia). regression analysis of tree height versustree diameter revealedseveral models (linear, logarithmic, exponential and power) that could beused for estimating the tree height of these five species. the logarithmic,power and exponential functions provided a good fit to the data on tree heightagainst tree diameter for ash tree (r2 = 0.9 and rmse = 0.74), ailanthus tree(r2 = 0.92 and rmse = 0.44) and plane tree (r2 = 0.72 and rmse = 0.72),respectively.