水土保持通报2017，Vol.37Issue(2)：177-182,6.DOI:10.13961/j.cnki.stbctb.2017.02.027
绿洲—荒漠交错带典型裸露地表的光谱特征
Spectral Signature of Typical Bare Surface in Oasis-desert Crisscross
摘要
Abstract
[Objective] The measured spectra data of several typical bare surfaces were analyzed such to provide references for desertification prevention and control.[Methods] Methods of spectral analysis as moving average,reciprocal take logarithm(RLR) reflectance,first derivative transformation(FDR) and continuum removal(CR) were used to identity the sensitive band range of each ground feature.The paper aimed to explore the application of GF-1 and other extended use of that.The spectral indexes,such as normalized difference index(NDSI),simple ratio index(SR),spectral difference entropy index(SDI) were used to separate each other.[Results] Differences of the original spectral signatures among several bare surfaces were small.Spectral reflectance transited slowly from invisible value to near-infrared one,but the rate of increasing was different among each ground feature.The differences among bare surfaces could be magnified by first order derivative transformation,reciprocal logarithm transformation and continuum removal spectra.The effectiveness of transformation was all better than original spectrum.[Conclusion] Because the calculated difference was magnified between the original and the transformed spectral index,the first order derivative transformed SDI can distinguish the surface features much better.关键词
裸露地表/盐结皮/绿洲—荒漠交错带/光谱反射率/包络线去除Key words
bare surface/salt crust/oasis-desert crisscross/spectral reflectance/continuum removal分类
资源环境引用本文复制引用
张微,姚琪,张波,房世峰..绿洲—荒漠交错带典型裸露地表的光谱特征[J].水土保持通报,2017,37(2):177-182,6.基金项目
中国地震局星火计划项目“大凉山次级块体孕震机制及强震预测”(xh16044) （xh16044）
中国地震局震情跟踪定向工作任务项目(2016010103) （2016010103）
国家自然科学基金新疆联合基金项目(U1503184) （U1503184）
