基于探地雷达的顶板绿化乔木根系探测研究——以朴树为例

Tree Root System Detection of Roof-Greening Tree Based on Ground Penetrating Radar

利用探地雷达测量顶板绿化乔木(朴树)根系,分别采用网格状、环状和射线状3种放线测量方式和900 MHz、1.5 GHz两种天线频率进行探测.结果显示:(1)1.5 GHz天线、网格状测量方式得到的疑似点最多效果最好,而射线状测量未得到任何数据;(2)通过分析计算得到根疑似点的空间坐标,并生成了空间分布图;(3)探测到的根系最深处为25 cm,表明顶板绿化植被的根系粗根分布浅;(4)探地雷达可用于探测根系的位置、相对分布面积,但由疑似点的散点生成根系的三维实体结构还缺乏研究基础和模型验证,因此研究认为,仅用探地雷达技术而不结合其他方法反演根系空间结构具有一定的局限性.

In this study,ground penetrating radar is used to detect the root system of the roof-greening tree(Celtis sinesis Pers). Three setting out patterns,namely grid,ring and ray,and two antenna frequencies of 900 MHz and 1.5 GHz,were used respectively. The results showed that:(1)The measurement of 1.5 GHz antenna and grid setting out is most effective,while no data is obtained from radial setting-out;(2)The three-dimensional distribution mapping of suspected points is generated by calculating the spatial coordinates of the root suspected points;(3)The deepest depth of the detected root system is 25 cm,indicating that the thick root distribution of the roof greening vegetation is shallow;(4)The ground penetrating radar is effective in detecting the location and distribution area of root system,however,judging the three-dimensional spatial structure of the whole root system and generating three-dimensional solid structure from the scattered distribution of suspected points of the root system still lacks research basis and model verification. It has limitations to use only the ground penetrating radar technology without combining other methods.