3D RISK MAPPING OF HAZARD TREE IN CHANGDEOKGUNG PALACE

Abstract. This study aimed to draw up a risk map of predicting the potential failure zone and impulse that may occur due to the fall of trees in the palace. The main findings of the study are as follows. First, a formula for calculating a failure zone and impulse that would occur in the fall of trees was established. The potential failure zone was calculated with the internal range of a circle with a radius of 1.5 times the height, reflecting the possibility of a tree falling and slipping. Second, employing Rhino3D and Grasshopper algorithms for calculating the failure zone and impulse were developed. It was designed, considering rearing information, such as tree height and weight, and the adjacent trees and terrain. Third, tree risk maps were produced in the areas of Yeongyeongdang Hall and Aeryeonjeong Pavilion in Changdeokgung Palace. In the tree risk map, the impulse and failure zone were marked, expected for the buildings and terrain against which trees collide when fall. It was possible to understand the space and trees with great impulse and high possibility of risk in advance through this. This study has significance in that it proposed methods for quantifying and predicting the potential failure zone and impulse occurring in the fall of trees. Assessing the trees accompanied by a lot of damage since they have a wide failure zone would make efficient management possible. In addition, it can be utilized for the establishment of countermeasures for disaster prevention and as baseline data for the safety of the surrounding cultural heritage and visitors.