野鸭湖湿地牛鞭草不同覆盖度的光谱特征分析

采用导数法和包络线去除法,分析了不同覆盖度牛鞭草的光谱特征.结果表明,不同覆盖度的牛鞭草在绿光波段出现反射峰,在红光波段出现吸收谷,近红外波段处具有"红边效应".不同盖度的牛鞭草光谱反射率的差异主要体现在绿光(520～600 nm)和近红外波段(760～900 nm).在近红外波段范围内,反射率随覆盖度的增加而增大,两者呈极显著正相关(P<0.01).此外,红光波段比蓝光波段有更为强烈的吸收效应.我们的研究表明,高光谱遥感可以有效地应用于湿地植物覆盖度或与之相关的生长情况的监测之中.

Analysis of Spectral Characteristics on Different Coverage of Hemarthria altissima in Yeyahu Wetland

We analyzed the spectral characteristics of different coverage of Hemarthria altissima by the derivative and continuum-removal methods in the Yeyahu wetlands.The results show that the spectral curves of Hemarthria altissima in different coverage have a reflection peak in the green band,absorption valley in the red band and Red edge effect in near infrared band.The differences of spectral reflectance in different coverage are mainly reflected in the green（520 ～ 600 nm） and near infrared bands（760 ～ 900 nm）.In the near infrared band,the reflectance increases with the increase of the coverage and the two variables show a very significant positive correlation（P ＆lt; 0.01）.In addition,the absorption effect of the red band is stronger than that of the blue band.Our study shows that hyperspectral remote sensing technology can be effectively applied in the monitoring of coverage or corresponding growth condition of wetland plant.