Fig. 6 | Scientific Reports

Fig. 6

From: High precision water quality retrieval in Dianchi Lake using Gaofen 5 data and machine learning methods

Fig. 6

Correlation diagram of original spectral. The black line represents the correlation between pH and the spectral bands after preprocessing. The red line represents the correlation between CODcr and the spectral bands after preprocessing. The blue line represents the correlation between TP and the spectral bands after preprocessing. The orange line represents the correlation between NH3-N and the spectral bands after preprocessing. The purple line represents the correlation between TN and the spectral bands after preprocessing. The green line represents the correlation between Chl and the spectral bands after preprocessing. Values above the solid line indicate a strong correlation between the band and the WQI. Values above the dashed line indicate a stronger correlation between the band and the WQI.

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