“山竹”台风对深圳前湾片区 5 个公园园林树木的影响

The Impact of Typhoon Mangkhut on Garden Trees in Five Parks in Qianwan District, Shenzhen

摘要:

以深圳前湾片区5个公园中的50种园林树木为调查研究对象，选取6个风害受损特征指标，采用层次分析法和模糊综合评价法对园林树木进行风灾后抗风性的调研分析与评价。结果发现，园林树木风害受损率与树高、冠高、冠幅、根系状况、抗弯强度和支撑条件均呈极显著相关性，与顺纹抗压强度和病虫害情况呈显著相关性；新建项目中，抗风表型良好的园林树木多为小乔木，而抗风表现较差的多为存在树木“头重脚轻”现象的树木。最后，总结降低园林树木台风损害的对策和树木配置优化措施。

Abstract:

Taking 50 kinds of garden trees in 5 parks in Qianwan District of Shenzhen as the research object, this paper selects 6 wind damage characteristic indicators, and uses analytic hierarchy process (AHP) and fuzzy comprehensive evaluation method to investigate and evaluate the wind resistance of garden trees after wind disaster. The results show that the wind damage rate of garden trees is significantly correlated with the tree height, crown height, crown width, root system, flexural strength and support conditions, and is significantly correlated with compressive strength along the grain and pest and disease conditions. In new projects, garden trees with good wind resistance phenotype are mostly small trees, while those with poor wind resistance are mostly trees with a "top-heavy" phenomenon. Finally, the paper summarizes the countermeasures to reduce the typhoon damage to garden trees and the optimization measures of tree allocation.