基于高分一号与Landsat-8影像的水体浊度反演比较

Comparison of Lake Turbidity Inversion Based on GF-1 and Landsat-8 Satellite Images

为分析高分一号WFV传感器16 m遥感影像在水质反演方面的能力,本文选取南四湖为研究区,以高分一号卫星影像与Landsat-8卫星OLI影像为数据源,结合地面同步实测水体浊度数据,建立反演水体浊度的原始光谱反射率模型、归一化反射率模型和波段比值模型,并对各模型进行精度评价,分别比较两个传感器在浊度反演能力方面的差异。结果表明:利用高分一号WFV 16m遥感影像进行水质反演具有较高的精度,且具备更高的空间分辨率和更短的重访周期,可以替代Landsat-8多光谱数据。

With the wide use of GF - 1 data, the ability of water quality parameter retrieval model of the data needs to be further ana-lyzed. Based On the data of satellite GF - 1 and OLI data of Landsat - 8 as well as the simultaneous field survey of Turbidity measure-ment data, with a typical reservoir of Nansi Lake as research area, the original spectral reflectance model, the normalized spectral re-flectance model, and band ratio model were built, in which abilities of two sensors to retrieval water quality parameters in desertifica-tion areas were compared with each other. It was shown that,GF - 1 has a relatively high data quality, and it has a higher resolution, shorter revisit cycle, it can replace Landsat - 8 data in lake turbidity inversion.