基于Landsat8数据的舟山群岛海域悬浮泥沙浓度遥感研究  

Remote Sensing Research of Suspended Sediment Concentration in Zhoushan Archipelago Sea Area Based on Landsat8 Data

作　　者：潘磊剑 郭碧云 PAN Leijian;GUO Biyun(Zhejiang Ocean University Marine Science and Technology College,Zhoushan 316022,China)

机构地区：[1]浙江海洋大学海洋科学与技术学院,舟山316022

出　　处：《海洋开发与管理》2020年第9期82-90,共9页Ocean Development and Management

基　　金：国家自然科学基金项目(51479179);浙江海洋大学科研配套经费项目(21109004614P);浙江海洋大学科研启动经费项目(21105011713)。

摘　　要：文章利用舟山近岸海域实测水体光谱及泥沙浓度数据,分析光谱反射率与悬浮泥沙浓度的相关性,并结合Landsat8遥感数据进行该海域的悬浮泥沙浓度遥感反演。研究表明:随着水体悬浮泥沙浓度的增加,各波段的反射率相应增加,且不同波段的增幅有明显不同,水体光谱曲线存在"双峰"现象;Landsat8遥感数据的波段4与波段3的比值与悬浮泥沙浓度的相关性较好;舟山群岛海域总体处于高泥沙浓度的状态,岛屿近岸悬浮泥沙浓度明显高于开阔水域,岛屿周围的悬浮泥沙浓度呈现"西高东低"的格局;一元二次方程模型(二次模型)对舟山海域水体的悬浮泥沙浓度反演精度较其他模型(线性模型,对数模型,指数模型,幂指数模型)高;Landsat8遥感数据可用于舟山海域悬浮泥沙浓度的监测。本研究成果能为近岸海域港口建设、航道安全、环境监测等研究提供数据支持。In this paper,the retrieval of suspended sediment concentration in Zhoushan sea area was studied by using the measured spectrum data,suspended sediment concentration data and Landsat8 remote sensing data.Research showed that with the increase of suspended sediment concentration,the reflectance of different wavebands increased correspondingly,and the increase was obviously different,the spectral curve of water showed"double peak"phenomenon.The ratio of band 4 and band 3 of Landsat 8 remote sensing data had a great correlation with suspended sediment concentration.Zhoushan archipelago was in a state of high sediment concentration generally,the concentration of suspended sediment near the islands was higher than that in the open water area significantly and suspended sediment concentration around the islands presented a pattern of"higher in the west and lower in the east".The accuracy that retrieval of suspended sediment concentration in Zhoushan coastal area by the model of one variable quadratic equation model(quadratic model)was higher than others(linear model,logarithmic model,exponential model,power exponential model).The remote sensing data of Landsat8 could be used to monitor the concentration of suspended sediment concentration in Zhoushan sea area.The results of this study could provide data support for the research of port construction,channel safety,environmental monitoring and so on.

关 键 词：悬浮泥沙 舟山海域 模型构建 Landsat8 遥感反演 

分 类 号：P733.3[天文地球—物理海洋学] P734.23[天文地球—海洋科学]