title: [Research on the spectral characteristics of grassland in arid regions based on hyperspectral image].
abstract: The grassland spectrum was got from Hyperion images of Shiyang River Basin using PPI, after FLAASH atmosphere correction, to understand the spectral characteristics quantitatively. The results show that red edge moves left, slope reduced, blue and yellow edge feature is abated, reflectance is higher in visible bands, and lower near-infrared bands when grassland is at decline stage relative to the spectrum characteristics of grassland at well growth. The red edge, green peaks, absorption valley location of blue and red light keep consistent for different coverage grassland, and spectrum absorption characteristics (band depth, width, area, symmetry) in visual bands change regularly as coverage increases, so it can be a basis for extraction or judgment of vegetation coverage.
authors.affiliation: College of Earth & Environmental Sciences, Research Center for Hydrologic Cycle and Water Resources in Arid Region, Lanzhou University, Lanzhou 730000, China. 495240584@qq.com
authors.forename: Chun-mei
authors.initials: CM
authors.lastname: Zhang
authors.forename: Jian-ming
authors.initials: JM
authors.lastname: Zhang
mesh_terms: D003889:Desert Climate; D004777:Environment; D065948:Grassland; D012106:Research; D045483:Rivers; D013057:Spectrum Analysis