钱佳,郭云开,蒋明,章琼

• 1:长沙理工大学交通运输工程学院
• 2:长沙理工大学测绘遥感应用技术研究所

摘要(Abstract)：

为探明不同类型土壤重金属Cu的敏感波段及构建普适性高光谱定量反演模型,该文以湖南省红壤、水稻土和潮土3种主要类型土壤为研究对象,在光谱预处理及组合变换基础上,采用相关性分析和逐步回归筛选重金属Cu敏感波段,并分别构建一元回归和逐步回归联合反演模型。结果表明,相较于原始光谱,组合变换光谱与土壤重金属相关性明显提高;通过逐步回归筛选重金属Cu的敏感波段位于400～850 nm和1 800～2 200 nm区域;相较于一元线性回归,逐步回归模型预测精度显著提升,应用对倒一阶微分光谱中400、590、620、670、790、850、1 790、2 270 nm波段反射率构建逐步回归模型反演精度达到最优,满足重金属Cu含量监测精度需求,同时为发展基于高光谱影像大面积反演不同土壤类型重金属Cu含量提供理论支撑。

关键词(KeyWords)： 重金属;土壤类型;高光谱;敏感波段;逐步回归

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(41671498,41471421)

作者(Author): 钱佳,郭云开,蒋明,章琼

DOI: 10.16251/j.cnki.1009-2307.2020.08.021

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