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%.
出处
《国土资源遥感》
CSCD
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)
关键词
Ⅱ类水体
光谱测量
悬浮泥沙
相关分析
曹妃甸
Case Ⅱ water
Spectral measurement
Suspended particulate matter
Correlative analysis
Caofeidian
