2016 Volume 36 Issue 2 Pages 126-130
Red tide of eutrophic lake (Togo-ike) in Tottori prefecture were observed by an UAV (Unmanned Aerial Vehicle) observation system in order to establish a monitoring method for simply and speedy evaluation of water quality of the lakes. From the relationship between color information contained in reflected light from the lake and the water qualities of the lake such as Chlorophyll-a, the distribution map of the water quality was able to be displayed. The method would be able to be applied to the easily water quality evaluation of the lake.