Evaluasi Kesehatan Pohon Peneduh Jenis Angsana (Pterocarpus indicus Willd.) secara Sonic Tomography di Kota Surabaya

Abstract

Shade trees in urban areas have very important roles for social, economic, ecological and aesthetics benefits. The health of shade trees could be detected by visual assessment as well as by non-destructive method. The internal condition of trunk is assessed by Sonic Tomography which is based on sound waves propagation in the wood. The objective of this research was to understand the health of shade trees in median street of Surabaya city. Ten street samples were chosen by purposive sampling according to the median paths. The result of this research shows that angsana (Pterocarpus indicus Willd.) was the dominant species found in Surabaya city. The results of sonic tomograph found that 75 trees were healthy trees with more than 75% of solid wood with sound wave propagation above 900 m / sec. Meanwhile there were four trees which suffered severe damage below 50% of solid wood.Visual observation showed that 44% healthy trees and 56% unhealthy conditions