曹妃甸近海Ⅱ类水体光谱反射率与悬浮泥沙浓度相关性研究  

THE CORRELATION BETWEEN THE AVERAGE REFLECTANCE OF CASE Ⅱ WATER IN CAOFEIDIAN OFFING AND THE CONCENTRATIONS OF SURFACE SUSPENDED PARTICULATE MATTER

作　　者：李建国[1] 孙晓明[1] 康慧[1] 田丰[2] 杜东[1] 方成[1] 

机构地区：[1]天津地质调查中心,天津300170 [2]中国国土资源航空物探遥感中心,北京100083

出　　处：《国土资源遥感》2009年第3期54-58,共5页Remote Sensing for Land & Resources

基　　金：河北曹妃甸滨海地区海岸带环境地质调查评价项目(1212010814005)

摘　　要：利用水面以上法对曹妃甸近海Ⅱ类水体进行现场光谱测量,对获取的数据与同步采集的水体悬浮泥沙浓度进行相关分析,初步建立了水体悬浮泥沙浓度与TM数据对应的可见光至近红外波段遥感反射率的经验模型。研究结果表明:该地区近海Ⅱ类水体的反射率随悬浮泥沙浓度的增加而增加,在泥沙浓度小于20 mg/L时,570 nm处的反射率随泥沙浓度增加而增大的特征优于670 nm处的,但当泥沙浓度大于20 mg/L时,后者反射率的增幅明显优于前者;TM 3中心波段处的反射率与表层悬浮泥沙浓度(SPM)呈显著的指数相关,利用模型计算的悬浮泥沙浓度平均相对误差低于±28%。Numerous spectroradiometric measurements were carried out in the Caofeidian offing and, on such a basis, correlation was made between the average reflectance and the concentrations of surface suspended particulate matter （SPM）. The empirical relationships were established between remote - sensing reflectance （ Rrs ） in TM - HRV bands and SPM concentrations. The results show that the remote - sensing reflectance increases with SPM concentrations. When the SPM concentrations are lower than 20 mg/L, the amplitudes of remote - sensing are wider in the 570 nm than in the 670 nm, but when the SPM concentrations are higher than 20 mg/L, things are just the opposite. The best correlations are obtained for Rrs （TM3） and SPM concentrations, which show remarkable exponential correlations. As a result, SPM concentrations within the surface waters in Caofeidian offing are estimated with an average accuracy better than ± 28%.

关 键 词：Ⅱ类水体 光谱测量 悬浮泥沙 相关分析 曹妃甸 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]