森林火灾林木烧毁株数统计方法研究

摘要

林木损失株数调查是森林火灾损失评估中的一项重要内容.以某起森林火灾为例,采用样圆抽样调查法,随机抽取3％典型样圆,并用GPS记录每个样圆的中心点坐标,利用autocad软件求算过火林地总面积、过火人工造林地面积和林木烧毁面积.根据相关计算公式测算出林木烧毁株数为27 722株,估算精度为95.08％.%The investigation of forest trees losses is one of the most important contents of forest fire loss assessment.By taking random forest fire as an example,according to the sampling survey method,this study random selected 3％ typical sample,used GPS to record each sample coordinates of the center circle,and finally calculated the total burned forestland area,artificial planting area and forest fire burned area by autocad software.The results showed that the burned plants were accounted for 27722 strains;the estimate accuracy was of 95.08％.