典型红树林反射光谱特征分析研究  

Analysis of Typical Mangrove Spectral Reflectance Characteristics

作　　者：于祥[1] 张丰收[2] 刘庆[1] 李德一[1] 赵冬至[2] 

机构地区：[1]滨州学院山东省黄河三角洲生态环境重点实验室,山东滨州256603 [2]国家海洋环境监测中心,辽宁大连116023

出　　处：《光谱学与光谱分析》2013年第2期454-458,共5页Spectroscopy and Spectral Analysis

基　　金：国家海洋公益性行业科研专项经费项目(201005011);山东省自然科学基金项目(ZR2011DL013;ZR2011DQ018);滨州学院重大招标课题(2011ZDL04)资助

摘　　要：获取红树林的反射光谱属性,探测其反射光谱特征波段,可为红树林各种指标的遥感反演模拟和估算提供技术依据。以广西山口红树林保护区典型红树林为研究对象,对美国ASD FieldSpec 2光谱仪实测的反射光谱曲线进行去噪平滑处理,获得木榄、红海榄、秋茄、白骨壤、桐花树、大米草和泥滩的标准反射光谱曲线并分析其反射光谱特征。结果表明:典型红树林反射光谱与大米草和泥滩的反射光谱区分明显,红树林类内反射光谱曲线走向大致相同,峰谷值出现波段基本一致,差异主要表现在特征波段反射峰值和谷值。采用空间距离法、相关系数法和光谱角度制图法来定量描述红树林类内反射光谱差异性和相关性,通过样本验证区分方法精度,相关系数法>光谱角度制图法>空间距离法,发现红树林类内和大米草的反射光谱相关系数均>0.995,反射光谱夹角余弦值均>0.95,相似性强,差异小。Acquisition of mangrove spectrum properties and detecting the sensitive bands provide technology basxs for mverse modeling and estimation by remote sensing for various indexes of mangrove. The typical mangroves of Guangxi Shankou Mangrove Reserve were taken for study objects, the standard spectrum curves of Bruguiera gyrnnorrhiza （Linn.） Savigny, Rhi- zophora stylosa, Kandelia candel, Avicennia marina, Aegiceras cornieulatum, Spartina anglica and mudflat were gained by de-noising analysis of field-measured spectrum curves acquired by ASD FieldSpec 2. Analyzing the spectral characteristics and their differences, the authors found that the spectrum curves for various kinds of mangrove are coincident, the bands that appeared with reflection peaks and reflection valleys are basically identical, the within-class differentiated characteristics are comparatively small, the spectrum characteristics of mangroves are obviously different with Spartina angliea and mudflat. In order to gain the quantitative description for within-class differentiated characteristics of mangrove, space distance method, correlation coefficient method and spectral angle mapping method were used to calculate the withirrclass differentiated characteristics. The division ac-curacy of correlation coefficient method is higher than spectral angle mapping method which is higher than space distance meth-od, and the result indicates that the spectrum differences of within-class mangrove and Spartina anglica are relatively small with correlation coefficients more than 0. 995, and spectrum curve angle cosine values more than 0. 95.

关 键 词：红树林 反射光谱特征 特征波段 高光谱 

分 类 号：S712[农业科学—林学]