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近20年廉江红树林分布及变化的遥感分析
刘大召, 付东洋, 沈春燕
广东海洋大学 湛江 524088
摘要:
红树林有重要的社会和经济价值,1997年在廉江市设立了国家红树林自然保护区。为了评估红树林自然保护区的功能,利用1991年的1景TM遥感数据,2000年的ETM+遥感数据和2011年HJ遥感数据进行廉江红树林信息的提取。结果表明:1991,2000和2011年廉江的红树林分布面积分别为131.6ha, 628.7ha,和1056.2ha。自1991年至2011年红树林呈增加的趋势,共增加924.6ha,20年间研究区域的红树林约增加了7倍。湛江红树林国家自然保护区的建立对于红树林湿地生态系统的保护和恢复起到极大的促进作用,研究区域红树林造林恢复成果显著,种植了大量的人工红树林。
关键词:  红树林  NDVI  非监督分类
DOI:10.11759/hykx20180625001
分类号:
基金项目:
Remote sensing of distribution and change of mangrove forest in Lianjiang over the past 20 years
ldz, Fu Dongyang, Shen Chunyan
Guang Dong Ocea University
Abstract:
Mangrove forests provide valuable societal and ecological services and goods. The National Mangrove Forest Nature Reserve has been established for mangrove protection since 1997 In Lianjiang. In order to evaluate the function of the Mangrove Nature Reserve,there are three remote sensing data , one TM in 1991, one ETM+ in 2000 and one HJ in 2011,were used to analyze the mangrove distribution and change in the study area. The results showed the area of mangrove in Lianjiang in 1991, 2000, and 2011 are 131.6 ha, 628.7 ha,and 1056.2 ha, respectively. Between 1991 and 2011, the area of mangrove presents a continuous increase trend, with an increase of about 924.6 ha, and mangrove forests in the study area increased about 7 times over 20 years. The establishment of Zhanjiang Mangrove Forest National Nature Reserve has promoted the protection and restoration of mangrove in the study areas and many mangroves were planted artificially.
Key words:  mangrove  NDVI  Unsupervised classification
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