In urban areas, trees provide aesthetic and comfort value, as well as a part of the history of the city and human civilization. The environmental stresses have led to a hazard trees. It can be harmful to humans due to falling or collapse suddenly. In other things, healthy living trees at plantation forest have been greatly impact on wood productivity. This article reports the results of a study using NDT technology based on ultrasonic wave propagation combining visual observation in urban trees and plantation forest. Most of tree planted as shade trees in urban area of Bogor and district of south Jakarta were mahagony (mahoni) mahogany (Swietenia sp.) and pterocarpus (angsana) angsana (Pterocarpus sp). The deterioration symptoms that appear in trees were open hollow, lianas and epiphytes attack, decay and death of bark, as well as termite attack. The healthy living trees in Bogor reached 50% with the ultrasonic wave velocity above 1200 m/sec. In opposite, more than 50% trees were in unhealthy condition with ultrasonic wave speeds below 800 m/sec at south Jakarta district. At plantation forest, more than 90% trees were in healthy standing trees as indicted with ultrasonic wave velocity value of above 1200 m/sec.
Keywords: living tree, urban trees, ultrasonic velocity, visual assessment, NDT
Karlinasari, L, IL Maryanti, HN Batubara, RM Dhani, D Nandika. 2012. Evaluasi Visual dan Karakteristik Kecepatan Gelombang Ultrasonik Pohon Peneduh Di Perkotaan dan Hutan Tanaman (Visual Evaluation and Ultrasonic Wave Velocity Characteristics of Shade Trees in Urban Area and Plantation Forest). Jurnal Ilmu dan Teknologi Hasil Hutan. Vol. 5 (2): 40-46.