分析了射阳河口海域实测光谱反射率与DIN、DIP浓度间的相关性,发现DIN、DIP浓度与水体浊度间呈强烈的正相关,说明在该海域DIN和DIP主要来源于沉积物再悬浮过程中的释放.在此基础上以实测光谱模拟MODIS前四个波段的反射率,建立了基于MODIS影像的DIN、DIP浓度定量反演模型,模型的相对预测精度达到60％以上,将模型应用于影像反演所得的结果与实际情况相当吻合,证明了模型的实际应用价值和业务化潜力.%In this paper, the correlations between the in-siiu spectrum and the synchronous concentration of DIN and DIP collected in Sheyang Estuary were calculated. The results showed that DIN and DIP concentration had strong positive correlation with the turbidity of water in this sea area. It indicated that DIN and DIP in this sea area were mainly originated from the sediment resuspension in normal status. The spectrums of MODIS simulated from the in-situ spectrums were used to establish the retrieving model. The relative accuracy of the model was exceeding 60 %. The distribution of DIN and DIP concentration retrieved by the model was consistent well with the real conditions. These prove the applicable and operable value of the model.
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