Estimation of Suspended Sediment Concentration Along the Pao River using Sentinel-2 Imagery
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Abstract
Monitoring and quantifying suspended sediment concentration (SSC) along the rivers provide important information for reservoir management. Traditional monitoring based on in situ measurements of SSC through in-situ sampling in rivers is expensive and time-consuming to perform. The objective of this study was to use spectral information provided by remote sensing from Sentinel-2 images in combination with machine learning to estimate SSC in the pao river. Three machine-learning regression algorithms (multiple linear regression, deep learning, and Support Vector Machine : SVM) were evaluated and a suitable model created to estimate SSC of the pao river. The results show that the Support Vector Machine model gave the most balanced results, with the lowest RMSE values and a high statistical correlation (R2=0.863 ; RMSE = 11.9) for the whole range of SSC (0 to 90 mg/l) measured at this station during the studied period. The methodology presented in this study can be used as a guideline for the combination of machine learning with Sentinel-2 images for estimating
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