水利信息化Issue(3)：73-78,6.DOI:10.19364/j.1674-9405.2025.03.012
双波段光谱指数的中小河道水质参数反演研究
Retrieval of water quality parameters in small and medium-sized rivers based on dual-band spectral indices
崔玉莹 1赵细元 1储美华 1吕磊 1谢素娟1
作者信息
- 1. 上海盛图遥感工程技术有限公司,上海 201803
- 折叠
摘要
Abstract
To address the low correlation between single-band reflectance and water quality parameters in hyperspectral remote sensing data,as well as the low accuracy of inversion models,this study optimized and compared water quality parameter retrieval models by constructing three dual-band spectral indices including NDSI,RSI,and DSI.Based on the correlation analysis method,the characteristic bands with the highest correlation coefficient between the water quality parameter test data and the dual-band spectral indices were selected to construct the water quality parameter retrieval model.R2,RMSE,MAE and MAPE were used to evaluate the accuracy of the model.Results demonstrated that,compared to single-band reflectance,dual-band spectral indices exhibited significantly higher correlation coefficients with water quality parameters,thereby improving model accuracy.The index model constructed by NDSI(687,681)and CODMn achieved the highest accuracy(R2=0.709),and the lowest was DSI(669,690)constructed with quadratic polynomial model with NH3-N(R2=0.384).The constructed inversion model of water quality parameters has a good inversion effect in the hyperspectral UAV,enabling their direct application for monitoring water quality in small-scale aquatic systems such as urban rivers and tributaries when integrated with hyperspectral data.关键词
双波段光谱指数/归一化光谱指数/光谱比值指数/光谱差值指数/水质参数反演/无人机高光谱Key words
dual-band spectral indices/normalized difference spectral index/spectral ratio index/spectral difference index/water quality parameter retrieval/UAV hyperspectral分类
环境科学引用本文复制引用
崔玉莹,赵细元,储美华,吕磊,谢素娟..双波段光谱指数的中小河道水质参数反演研究[J].水利信息化,2025,(3):73-78,6.
