论文部分内容阅读
地物光谱特征是遥感机理的重要内容,也是遥感应用研究的重要依据。盐碱土的反射光谱特性反映了盐碱土的理化特征。以干旱区3种典型的盐碱土为研究对象,测量了不同含盐量和含水率的土壤反射率光谱,并分析了其光谱特征。结果表明,3种盐碱土的光谱反射率在干燥状态下有明显的高低规律。经过去包络线处理后,3种盐碱土在干燥状态下具有明显不同的光谱特征,且在干湿两种状态下,两个水分吸收谷处的吸收深度的深浅均具有明显的深浅差异。根据这些特征可以将3种类型的盐碱土区分出来。研究结果可为今后进一步研究盐碱化土壤参数反演和分类,以及盐碱土监测等遥感应用服务。
The spectral features of terrestrial objects are an important part of remote sensing mechanism and an important basis for the study of remote sensing applications. The reflection spectrum of saline-alkali soil reflects the physical and chemical characteristics of saline-alkali soil. Taking the three kinds of typical saline-alkali soils in arid area as the research object, the soil reflectance spectra with different salt content and water content were measured and their spectral characteristics were analyzed. The results show that the spectral reflectance of the three kinds of saline-alkali soil is obviously high and low in the dry state. After de-enveloping, the three kinds of saline-alkali soil show distinct spectral characteristics under the dry state, and the depth of absorption depth of the two moisture absorption valleys has obvious difference in both wet and dry conditions. Based on these characteristics, three types of saline-alkali soil can be distinguished. The results of this study can be used to further study the retrieval and classification of salinized soil parameters and remote sensing application services such as saline-alkali soil monitoring in the future.