基于GF-WFV的厦门海域水体悬浮物浓度反演

发布时间：2018-06-18 11:18

本文选题：海洋遥感学 + 厦门海域　；参考：《应用海洋学学报》2016年04期

【摘要】：为利用遥感技术快速、及时的掌握厦门近岸海域水体中悬浮颗粒物的总体分布情况,现场测量了厦门海域水体的下行入射辐射、天空光以及经过水气界面后反射回的辐射,计算了该海域水体表面的离水辐射获得了水体表面以上遥感反射率;同时采集了与光谱信息同步的水体样品,并分析了水体中的悬浮颗粒物质量浓度,获取了对应站位的水体反射波谱曲线和采集样品的浓度数据.通过研究不同站位水体的反射光谱数据,依据GF-WFV波段设置,对现场实测的光谱数据进行了拟合,并创建了基于GF-WFV拟合波段的悬浮颗粒物浓度经验反演算法.通过研究发现拟合(Rrs3+Rrs4)/Rrs2(其中Rrs1、Rrs2、Rrs3、Rrs4分别是GF-WFV第1、2、3、4波段的遥感反射率)同实测水体悬浮颗粒物质量浓度之间的决定系数为0.655,依据研究得出的反演算法反演该海域水体悬浮颗粒物质量浓度,其均方根误差为11.03 mg/dm3,相对误差为8.40 mg/dm3.利用同步的GF-WFV遥感数据对厦门近岸水体中总悬浮颗粒物质量浓度进行了研究,获取了研究区水体悬浮颗粒物的空间分布情况,结果表明GF-WFV遥感数据能很好的反映厦门近岸水体悬浮颗粒物浓度分布状况.
[Abstract]:In order to grasp the overall distribution of suspended particles in the coastal waters of Xiamen quickly and timely by using remote sensing technology, the downward incident radiation, sky light and the radiation reflected from the water and air interface in Xiamen sea area were measured in the field. The remote sensing reflectance above the water surface was obtained by the off-water radiation from the water surface of the sea area, and the water samples synchronized with the spectral information were collected, and the mass concentration of suspended particulates in the water was analyzed. The reflectance spectrum curve of the corresponding station and the concentration data of the collected samples were obtained. According to the setting of GF-WFV band, the field measured spectral data were fitted, and an empirical inversion algorithm of suspended particle concentration based on GF-WFV fitting band was established. It is found that the coefficient of determination between RRs3RRs4 / Rrs2 (where RRs1RRs2RRs2ORs4 is the remote sensing reflectance of GF-WFV band 1 / RRs4) and the measured mass concentration of suspended particulates in water body is 0.655. The inversion algorithm obtained from the study is used to retrieve the suspended water body in this sea area. Floating particle mass concentration, The root mean square error is 11.03 mg / d m 3, and the relative error is 8.40 mg / d m 3. Using synchronous GF-WFV remote sensing data, the mass concentration of total suspended particulates in Xiamen coastal waters was studied, and the spatial distribution of suspended particles in the study area was obtained. The results show that the GF-WFV remote sensing data can well reflect the concentration distribution of suspended particulates in Xiamen coastal waters.
【作者单位】：环境保护部卫星环境应用中心;国家海洋局第三海洋研究所;
【基金】：环保公益资助项目(201409100)
【分类号】：P734.23;P715.7

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