草地覆盖度测算方法研究进展  

Research progress in grassland fractional coverage estimation methods

作　　者：温庆可[1] 张增祥[1] 刘斌[1] 乔竹萍[1] 

机构地区：[1]中国科学院遥感应用研究所,北京100101

出　　处：《草业科学》2009年第12期30-36,共7页Pratacultural Science

基　　金：国家科技支撑计划"国家生态恢复重建的综合监测评估关键技术研发"项目(08z0150020)

摘　　要：草地覆盖度作为一个重要的生态学参数被用在许多气候模型和生态模型中,测算是否精准,很大程度上决定了相关科学研究的精度。归纳了草地覆盖度测算的多种方法,整合了众多学者对草地覆盖度测算方法分类的认识差异,重点针对广泛使用的遥感技术,按照遥感的基本原理对诸多遥感估算法重新归类,理清了遥感估算草地覆盖度的基本思路。同时,分析了各种草地覆盖度测算方法的机理、优缺点和适用范围,为草地覆盖度研究方法选择提供理论依据,最后指出了草地覆盖度测算的发展趋势和研究重点。As an important ecological variable, the grassland fractional coverage is used in meteorological and ecological analysis and modeling. The precision of the grassland fractional coverage estimation deeply affects the precision of related studies. A number of methods which are used to estimate the grassland fractional coverage and the different opinions were reviewed and analyzed. Focusing on the remote sensing technology, the existing remote sensing based estimating methods were reclassified in order to clear the basic thoughts for estimating the grassland fractional coverage. Moreover, the features, advantage and shortage of each method were analyzed as well.

关 键 词：草地覆盖度 经验模型 混合像元分解 亚像元 遥感 照相法 

分 类 号：S812[农业科学—草业科学]