Urban forest are influenced by urban environment, what has a negative effect on the vital activities of the trees. Growth environment of trees on urban territories and in natural areas are completely different. Research data was collected in urban forest stands of Kyiv city during thinnings. Special methodological characteristics of the measuring of main biometrical tree parameters in urban area are explained in this work. Importantly, chestnut trees have morphological feature which stems are branching on the certain height leading to occurrence of the several main branches. Modelling tree stem volume, the most important pa
diameter, height, the volume of the stem, mathematical model, form factor