基于生物光学模型的巢湖后向散射概率估算

后向散射概率是水面光谱的重要影响因素.利用2009年6月巢湖实测数据,基于生物光学模型在近红外波段的简化原理,通过2个近红外波段构建巢湖后向散射概率估算模型.结果表明,巢湖后向散射概率最大值为0.059,最小值为0.001 4,均值为0.023 6,巢湖西部后向散射概率总体上大于东部,并且西部的空间差异性要大干东部.此...

Estimating of Backscattering Rate in Lake Chaohu Based on Bio-optical Model

Backscattering rate is the important factor of above water spectra. A bio-optical model simplified in near-infrared bands was constructed to estimate backscattering rate in Lake Chaohu by using the in-situ data measured in June 2009. The results show that the maximum value of backscattering rate in Lake Chaohu is 0.059, the minimum value is 0.0014 and the mean value is 0.0236. Backscattering rate and spatial differences in the west of Lake Chaohu are all greater than that in the east. In addition, particle refractive index of each sampling site was calculated by using backscattering rate. The dominant factors of in-water particles were determined according to the change scopes of refractive index. The results show that 74% of all sampling sites are dominated by inorganic particles, 18.5% of all sampling sites are dominated by both phytoplankton and inorganic particles, and the rest of sampling sites which accounts only for 7.4% of all sampling sites are dominated by phytoplankton. This indicates that backscattering character of Chaohu Lake is mainly affected by inorganic particles, while the effect of algae particle is relatively small.