a study of the damage datea and wind resistance of taipei street trees using typhoons herb, amber and zeb as case study

Autor: chen ging ging, 陳晶晶
Rok vydání: 1999
Druh dokumentu: 學位論文 ; thesis
Popis: 87
The purpose of this thesis is two-fold. Firstly, it is to collect and investigate the damage data caused by Typhoons Herb, Amber &Zeb in order to evaluate the wind resistance of the street tree species densely planted in Taipei. Secondly, based on the tree growth data of 1973-1980, the author is to select five species of low wind resistance for a field study. It is hoped that through the field study of these trees that have been planted in Taipei for 19-25 years, the author can evaluate their suitability and see if a replacement of high wind resistance trees is necessary. The results are summarized as follows：A. Obvious differences were found in wind resistance among the ten most densely planted street tree species in Taipei; they were ranked as follows in terms of easy wind knock-down, Rusty Shield-Bearer（30%）, Botree（19.6%）, Indian Rubber Tree（13.7%）, Queen Crape Myrtle（15.2%）, Fig（12.3%）, Camphor（7.1%）, Flame Goldrain Tree（5%）, Cajuput（4.1%）, Fragrant Maple（2.5%） and Red Cedar（2.1%）.B. The following five tree species were found to be less wind resistant - Rusty Shield-Bearer, Botree, Rubber Tree, Queen Crape Myrtle and Fig. Among these species, Botree, Rubber Tree and Fig are not aesthetic because of their brown masses of aerial roots. In addition, their ground roots are so invasive that they often destroy pavement surface. Those three species should be gradually phased out for other suitable high wind resistant species. In general, flowering street trees are most favorable in Taipei. Both Queen Crape Myrtle and Rusty Shield-Bearer are flowering trees and do not damage street surfaces. To increase their wind resistance, they should be planted on roads with less wind or with other high wind resistant tree species.
Databáze: Networked Digital Library of Theses & Dissertations
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