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实测光谱及模拟Hyperion光谱数据与表层水体无机氮磷营养盐浓度进行相关性分析,以及氮磷与悬沙浓度的光谱相关性分析,构建定量模型,实现了射阳河口水体无机氮磷浓度的定量反演。结果表明:现场实测光谱反射率与氮、磷浓度以及悬沙浓度间的相关性具有很强的相似性,相关系数曲线的变化趋势几乎完全一致。对Hyperion的各波段与896nm间进行了9种波段组合与氮磷浓度进行相关性分析,相关系数最大的因子为中心波长为428nm波段与896nm波段光谱反射率的归一化差值指数因子(F3(428,896)),分别为0.80与0.79。以F3(428,896)因子构建线性模型,模型检验的相对RMSE分别为36.63%和47.33%,反映了模型具有良好的预测精度。同时,模型充分显示了河口氮磷含量与悬沙浓度的高度相关性以及氮磷含量本身的高相关性。 更多还原

【Abstract】 In this study,the correlations between experimental hyperspectral data or hyperion reflectance and total inorganic nitrogen(TIN),total inorganic phosphorus(TIP) concentration,as well as the relationship between TIN,TIP and suspended sediment concentration(SSC),were analyzed to establish the quantitative models on TIN and TIP concentration in Sheyang estuary.The results showed that:the relationship between measured spectral reflectance and TIN,TIP,SSC were performed strong similarity with almost ... 更多还原