ACCURACY STUDIES OF SONIC TOMOGRAPHY FOR THE DETECTION OF EUROPEAN BEECH STEM ROT

Abstract

The aim of the work is to investigate the accuracy of sonic tomography in detecting European beech (Fagus sylvatica L.) stem rots. The object of the research is 96 beech stem cuttings, collected after random fellings in the Kalveliai and Jūrava forests of the Jurbarkas regional unit. During the research, with the ImageJ software, the real rots of the beech trunk cuttings and the Arbotom3D sonic tomograph data obtained according to the scales recommended by the manufacturer are compared.

It has been established that the most suitable measurement scale for detecting European beech rots is 500 - 2300 m/s. In the study, it was observed that when detecting rots in cuttings from pure stand forests, the sonic tomograph works most accurately on the scale recommended by the manufacturer. A wide range of usable sonic tomographic measurement scales can be used to detect core-bacterial rots.