水体氮磷高光谱遥感实验研究初探

水体中氮、磷含量是衡量水质的主要指标，遥感技术在环境监测中具有重要意义。利用高光谱遥感技术，通过测定实验室纯水条件下配比不同浓度氮、磷溶液的反射光谱，探索水体中有效态氮、磷的特征光谱。结果表明，氮在波长404和477 nm各有一反射峰，磷在350 nm处有一明显反射峰，且与浓度有很好的相关性，并以这些特征值建立了氮、磷浓度的遥感模型，为进一步遥感定量研究湖泊、水库和河流等大型内陆水体中的氮、磷奠定了基础。

Preliminary Exploring of Hyperspectral Remote Sensing Experiment for Nitrogen and Phosphorus in Water

The content of nitrogen and phosphorus in the waters is an important index to measure water quality,and the technique of remote sensing plays a large role in monitoring the change in environment.The reflectance spectra of nitrogen and phosphorus with different concentrations were measured to discover their special features under pure water condition in the laboratory by hyperspectral remote sensing technique.The result shows that nitrogen has reflectance peaks at 404 and 477 nm,and phosphorus at 350 nm,and these reflectance peaks have a good correlation with their concentrations,then a quantitative retrieval model was deduced for nitrogen and phosphorus based on that.These results will lay an important basis for further monitoring nitrogen and phosphorus by remote sensing technique in the big inland lakes,reservoirs and rivers.