青岛近海浒苔光谱特征研究

针对从2008年以来,每年夏季我国黄海南部暴发大面积的浒苔(Enteromorpha)灾害,对海洋环境及经济造成不利影响的状况,为了进一步研究浒苔特性,为利用遥感手段监测浒苔提供一定的理论依据,通过实地测量不同条件下浒苔的光谱反射率曲线,定性分析了浒苔的光谱特征。结果表明,浒苔的基本光谱特征表现为在蓝光波段和红光波段形成反射谷,在绿光波段形成反射峰,而在近红外波段反射率明显增大,形成高反射峰。因此将红光波段和近红外波段作为敏感波段,利用NDVI(归一化植被指数)提取遥感图像上的浒苔信息,可取得较好效果,有利于浒苔监测。

Research of spectrum characteristics of Enteromorpha in Qingdao offshore

Since 2008, large scales of Enteromorpha disaster broke out every summer in the southern Yellow Sea, resulting in negative influence on the marine environment and economy. In order to further study the characteristics of Enteromorpha, and provide certain theoretical basis of Enteromorpha monitoring by means of remote sensing, in this paper, we obtained spectral reflectance curves through the field measurements for different conditionsand analyzed the basic spectral characteristics of Enteromorpha qualitatively. It formed reflection valley in blue and red band and formed reflection peak in green band. The reflectance increased obviously and formed high reflection peak in the near infrared band. Therefore using red band and near-infrared band as sensitive wave bands and to extract Enteromorpha information of remote sensing image based on NDVI, good results can be obtained, which is beneficial to Enteromorpha monitoring.