浅谈植被指数的分类与应用
2017-01-14沈夏炯韩道军侯柏成马瑞
沈夏炯+韩道军++侯柏成+马瑞
摘 要: 随着遥感技术的发展,植被指数(vegetation index,VI)作为地表植被覆盖和植被生长状况的度量参数,被广泛应用于环境、生态、农业等领域。现有的科学文献中发布的植被指数种类超过了150种,这些缺乏科学分类的植被指数,使研究者在具体应用时不能够做出快速准确的选择。因此本文在分析了影响植被指数的诸多因素的基础上,对多种典型的植被指数进行概括分类,进而讨论各自的优势和应用局限性,这将有助于不同的植被指数能够更精确的应用在不同的研究和应用领域,从而在一定程度上给相关领域的研究者提供参考。
关键词: 植被指数; 植被覆盖; 度量参数; 分类
中图分类号:TP393 文献标志码:A 文章编号:1006-8228(2016)12-17-04
Abstract: With the development of remote sensing, vegetation index (VI) acts as the status metrics of vegetation cover and vegetation growth, it has been widely used in the field of environment, ecology and agriculture and so on. There are more than 150 kinds of vegetation indices published in the current scientific literature, these vegetation indices lack of scientific classification, so that the researchers cannot make a rapid and accurate choice in the specific application. Based on the analysis of the many factors that affect VI, this paper classifies the typical VIs, and then points their own advantages and limitations, which will help the different VI to be more accurately applied in different fields, and to a certain extent, to provide guidance to researchers in related fields.
Key words: vegetation index; vegetation cover; status metrics; classify
0 引言
在遥感领域中,植被指数一直以来都是用来量化地表植被覆盖情况和生长状况的一个简单而又直接的参考指标。随着遥感技术的发展和领域探索不断扩大化,植被指数在环境、生态、农业等领域有了广泛的应用[1]。在环境领域,植被指数被用来反演土地利用和覆盖的变化,逐渐成为全球环境变化的评价指标[2];在生态领域,利用植被指数实现土壤退化、水土流失、土地荒漠化、土地盐渍化、草原退化、森林破坏等状态的监测;在农业领域,植被指数广泛应用在农作物分布及长势监测、产量估算、农田灾害监测及预警、区域环境评价以及各种生物参数的提取。因此研究植被指数的分类和应用十分有必要。……
