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以辽东湾海水与辽河油田原油为材料,利用ASD全谱段地物光谱仪,针对海洋石油污染中的海面较薄油膜为研究对象,设计海面油膜光谱响应室内实验,模拟海面油膜厚度连续变化过程,测量并分析油膜光谱的变化特征及其与油膜厚度的相关关系.研究表明:在1150~2500nm短波红外谱段范围内,油膜的反射率随油膜厚度变化很小,但高于本底水体光谱反射率,此范围中有效遥感谱段具有探测较薄油膜有无的能力;在400~1150nm可见光-近红外谱段范围内,油膜光谱反射率明显低于本底水体,并随着表面油膜厚度的增加而逐步降低,油膜光谱反射率与油膜的厚度呈很强的幂函数负相关关系,以550和645nm为中心的绿光、红光波段的油膜光谱响应表现最优,可作为海面油膜多/高光谱遥感探测与评估的最佳选择波段.
Taking the oil from Liaodong Bay and Liaohe Oilfield as materials, this paper studied the thin film of sea surface oil in sea oil pollution by using the ASD full spectrum spectrometer, and designed the experiment of spectral response of sea oil film to simulate the continuous change of sea oil film thickness. The changes of the oil film spectra and the correlation with the oil film thickness were measured and analyzed.The results showed that the reflectivity of the oil film changed little with the thickness of the oil film in the shortwave IR range from 1150 to 2500 nm but higher than that of the background water body The effective remote sensing bands in this range have the ability to detect the presence or absence of thin oil films. The spectral reflectance of oil films is significantly lower than that of the background water in the visible-near-infrared spectral range from 400 to 1150 nm. With the increase of surface oil film thickness The spectral reflectance of the oil film has a strong power function negative correlation with the thickness of the oil film. The spectral response of the green and red light bands centered at 550 and 645 nm is the best, Hyperspectral remote sensing detection and evaluation of the best choice band.