https://www.academia.edu/72622055/New_Index_for_Water_Quality_Estimation_with_Remote_Sensing
Degradation of water quality in dams or lakes and closed bays has been proceeding, and it may be a crucial problem.
Poor-oxygen or eutrophic polluted water are the main reasons of the vicious circle. In particular, the deterioration of water quality
in developing countries is a severe problem, and its effect on human drinking water is a cause for a matter of concern. Since
surveying with water quality measuring devices is extremely expensive, developing simple method would be better way. Thus,
satellite remote sensing is a meaningful method. Hidaka conducted a multivariate analysis program of three visible bands in Isahaya
Bay based on drone images, and then succeeded in mapping the area (Hidaka 2017). In addition, Shiraishi developed VWRI in the
laboratory based on the new visible-range remote sensing index. Then, Von tried to apply it to a real lake using a drone (Shiraishi,
2018, Von, 2021). However, the result of VWRI was evaluated as inferior to NDVI in terms of its accuracy. Therefore, in this study,
we developed VQRI (Visible Quality Reputation Index), which is an improved version of VWRI. In this study, VQRI was compared
with JAXA's MODIS chlorophyll-a algorithm. In conclusion, the accuracy of the VQRI was verified on a local scale using the
satellite, Himawari-8, and it was an extremely high accuracy.
Degradation of water quality in dams or lakes and closed bays has been proceeding, and it may be a crucial problem.
Poor-oxygen or eutrophic polluted water are the main reasons of the vicious circle. In particular, the deterioration of water quality
in developing countries is a severe problem, and its effect on human drinking water is a cause for a matter of concern. Since
surveying with water quality measuring devices is extremely expensive, developing simple method would be better way. Thus,
satellite remote sensing is a meaningful method. Hidaka conducted a multivariate analysis program of three visible bands in Isahaya
Bay based on drone images, and then succeeded in mapping the area (Hidaka 2017). In addition, Shiraishi developed VWRI in the
laboratory based on the new visible-range remote sensing index. Then, Von tried to apply it to a real lake using a drone (Shiraishi,
2018, Von, 2021). However, the result of VWRI was evaluated as inferior to NDVI in terms of its accuracy. Therefore, in this study,
we developed VQRI (Visible Quality Reputation Index), which is an improved version of VWRI. In this study, VQRI was compared
with JAXA's MODIS chlorophyll-a algorithm. In conclusion, the accuracy of the VQRI was verified on a local scale using the
satellite, Himawari-8, and it was an extremely high accuracy.
