Development and Implementation of Spectral Crust Index over Dune Sands 

作成者 Karnieli, Arnon
日本十進分類法 (NDC) 450
内容 研究概要:Advantage is taken of a unique spectral feature of soil biogenic crust containing cyanohacterm It has been shown that the special phycobilin pigment in cyanobacteria contributes in producing a relatively higher reflectance in the blue spectral region than the same type of substrate without the biogenic crust. A spectral crust index (CI) has been developed, based on the normalized difference between the RED and the BLUE spectral values: CI=1-(RED-BLUE)/(RED+BLUE). Applying the index to a sand dune environment, it has been shown that the CI can be used to detect and to map, from remote sensing imagery, different lithologic/morphologic units such as active sands, crusted interdune areas and playas, which are expressed in the topography. As a mapping tool the CI image is much more sensitive to the ground features than the original mage. The absence, existence, and distribution of soil crust are an important information for desertification and climate change studies. They are also highly valuable information for developing agricultural regions and/or infrastructures in arid environments since soil crusts contribute to soil stability, soil build-up, soil fertility, and to the soil water regime.
コンテンツの種類 研究報告書 Research Paper
DCMI資源タイプ text
ファイル形式 application/pdf
掲載誌情報 Proceedings of the international symposium on "The role of remote sensing for the environmental issues in arid and semi-arid regions" page.173-180 (1997)
言語 英語

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