摘要
林地作为“山水林田湖草”之一,无论从生态价值还是经济价值上,都是自然资源的重要组成部分。山火作为林地主要灾害,对其具有严重的影响。通过植被指数对林地受灾情况进行分析以及对受灾后的林地恢复情况进行评估,对灾后重建与恢复工作具有较大意义。文章基于植被指数,利用遥感大范围覆盖、周期短、指数选择灵活性高、易于操作等特点,实现了对林地高效、准确的监测。对实验区数据进行分析后选取特定植被指数——归一化植被指数(NDVI)与比值植被指数(RVI),对实验区林地的状况以及灾后恢复情况进行分析。结果表明,利用植被指数对林地火灾情况以及灾后植被恢复情况分析可有效应用于林地监测以及灾后重建工作,可行性较高。
Forest land,as one of“mountains,rivers,forests,fields,lakes andgrasses”,is an important part of natural resources in terms of ecological value and economic value.As the main disaster of forest land,wildfire has a serious impact on forest land.It is of great significance for post-disaster reconstruction and restoration work to analyze the damage of forest land through vegetation index and to evaluate the restoration of forest land after disaster.Based on the vegetation index,this paper takes advantage of the characteristics of remote sensing,such as large-scale coverage,short period,high flexibility in index selection,and easy operation,to achieve efficient and accurate monitoring of forest land.After analyzing the data in the experimental area,select specific vegetation indices Normalized Difference Vegetation Index(NDVI)and Ratio Vegetation Index(RVI)to analyze the condition of forest land in the experimental area and post-disaster recovery.The experimental results show that the use of vegetation index to analyze forest fire conditions and post-disaster vegetation restoration can be effectively applied to forest land monitoring and post-disaster reconstruction,with high feasibility.
作者
孙世豪
符添玮
SUN Shi-hao;FU Tian-wei(Hainan GIS Center,Ministry of Natural Resources,Haikou Hainan 570203,China)
出处
《地矿测绘》
2022年第2期26-30,共5页
Surveying and Mapping of Geology and Mineral Resources
