关键词: 湿地, 植被类型, 光谱特征, 光谱反射率

Abstract: The hyperspectral characteristics of the typical representative of wetland vegetation moss grass,reeds,south should realize,Yi grass,water smartweed, artemisia selengensis and bermudagrass of Poyang Lake south Los Angeles wetland national nature reserve,based on the analysis of spectral reflectance data, using first-order derivative,the second derivative method to analyze the reflection spectrum band characteristic diversity of vegetation types. The results show that the spectral reflectance of these seven species in the visible band is lower than 15%. In "red edge" position the absorption rate of size of artemisia selengensis>bermudagrass>carex>water smartweed reeds>the national south Yi grass,reed,red edge slope. First derivative method can't get the best characteristics of vegetation spectral bands, but the second derivative effect is very good, according to seven kinds of typical vegetation type in 685.8 nm,692.4 nm,698.6 nm,704.3 nm,737.5 nm and 746.2 nm, which have obvious difference. The establishment of typical vegetation spectral library will provide basic data for wetland vegetation classification.

Key words: wetland, vegetation types, spectral characteristics, spectral reflectance