金沙滩近岸水体叶绿素a和悬浮物遥感反演研究  

Remote sensing retrieval of chlorophyll-a and suspended matter in coastal waters of Golden Beach

作　　者：盖颖颖 王章军 杨雷 周燕 龚金龙 GAI Yingying;WANG Zhangjun;YANG Lei;ZHOU Yan;GONG Jinlong(Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Marine Monitoring Instrument Equipment Technology, National Engineering and Technological Research Center of Marine Monitoring Equipment, Qingdao 266061, China)

机构地区：[1]齐鲁工业大学(山东省科学院),山东省科学院海洋仪器仪表研究所,山东省海洋监测仪器装备技术重点实验室,国家海洋监测设备工程技术研究中心,青岛266061

出　　处：《国土资源遥感》2020年第3期129-135,共7页Remote Sensing for Land & Resources

基　　金：国家重点研发计划项目“极区大气钠荧光多普勒激光雷达探测系统研发”(编号:2016YFC1400301);海洋公益性行业科研专项项目“海洋高光谱仪和机载激光测量系统产品化关键技术研究及应用示范”(编号:201505031);国家重点研发计划项目“面向气候变化的极区大气与空间环境业务化监测与研究”(编号:2018YFC1407300);国家自然科学基金项目“GFRP层板缺陷线性调频红外热波成像检测概率和特征图像融合算法研究”(编号:61701287);山东省重点研发计划项目“基于无人机的微型大气气溶胶垂直廓线探测仪关键技术研究”(编号:2019GGX104004)共同资助。

摘　　要：针对现有的水质要素反演模型应用于金沙滩近岸水体的水质要素反演精度低的问题,根据机载海洋高光谱仪光谱数据,借鉴已有黄海、东海二类水体水质要素的统计反演模式,建立了基于机载高光谱仪的金沙滩近岸水体叶绿素a和总悬浮物的反演模型,获得了研究区叶绿素a和总悬浮物浓度空间分布,并分析了机载海洋高光谱仪增益对模型反演精度的影响。模型改进后,光谱仪测量数据反演结果与水体取样实测结果的拟合决定系数和平均相对误差分别为:叶绿素a 0.65,4.41%,总悬浮物0.80,3.55%。通过对高光谱仪在同一海域相近时间段,但不同增益下获得的光谱数据进行叶绿素a和总悬浮物的反演对比,证明增益变化后,改进模型的反演平均相对误差和均方根误差均有所增加,反演精度降低,但误差仍在可接受范围内,模型稳定性整体良好。In view of the low precision of existing water quality element retrieval models applied to the coastal waters of Golden Beach,the authors,based on the statistical retrieval models of water color for caseⅡwater body in Yellow Sea and East China Sea by Tang Junwu,established the retrieval models of chlorophyll-a and total suspended matter concentration for coastal waters of Golden Beach by using the spectral data obtained from airborne marine hyper-spectrometer.The spatial distribution of chlorophyll-a and total suspended matter concentration in the study area was obtained and the influence of hyper-spectrometer gain on model retrieval accuracy was analyzed.After the models were improved,the determination coefficients and average relative errors between the retrieval results from spectrometer measurements and the sampling measurements were respectively chlorophyll-a 0.65,4.41%,and total suspended matter 0.80,3.55%.Retrieval results from the same spectrometer at the same coordinates and approximate time but under different gains were compared.It is proved that retrieval average relative errors and root mean square errors of improved models are all increased and the retrieval accuracy is reduced if gain changes.However,the error is in the allowable range and the model stability is good overall.

关 键 词：机载高光谱仪 金沙滩 近岸水体 叶绿素A 总悬浮物 增益 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]