黄壁庄水库水质参数遥感反演研究

Hyperspectral Characteristics and Retrieval of Water Quality Parameters for Huangbizhuang Reservoir

以石家庄市黄壁庄水库为研究对象,利用ASD FieldSpec Pro野外光谱辐射计进行反射光谱测量和同步水质采样分析,应用高光谱技术阐释了水质参数(SS、COD、TN、TP)与光谱反射率的关系,为今后利用星载高光谱传感器对黄壁庄水库乃至我国北方内陆水体水质参数进行大面积反演提供理论基础。在分析水库水体反射光谱特征的基础上,运用微分光谱技术和统计相关方法直接分析、诊断各水质参数的敏感波段,并建立线性估算模型,确定研究区SS、COD、TN、TP的敏感波段分别为715 nm7、04 nm、595 nm8、73 nm。

The choice of sensitive wave bands to retrieve water quality parameters is the prerequisite and basis as using remote sensing technology to monitor the water quality. The study area of this paper is Huangbizhuang reservoir in Shijiazhuang city. Spectral reflectance measurement and synchronous water quality sampling and analysis have been done using ASD FieldSpec Pro spectral radiometer. On the basis of analyzing the reservoir water reflectance spectral characteristics, the sensitive wave band of water quality parameters is diagnosed with the methods of differential spectroscopy and statistical analysis, and simple linear models to estimate have been established. The result shows that the differential spectroscopy technology has important sense for diagnosing the water quality parameters of sensitive wave band, and provides the theoretical basis for the future study of large- area water quality parameters in Huangbizhuang reservoir and even inland body of water in northern China.