TURBIDITY EVALUATION METHOD FOR MONITORING PLANAR DISTRIBUTION OF TURBIDITY USING AERIAL PHOTOGRAPHS

Abstract

 In marine construction projects where turbidity is generated by reclamation, dredging, etc., it is necessary to monitor the turbidity from the perspective of environmental preservation. In a general monitoring, the turbidity and SS are measured at monitoring points, but these point measurements cannot adequately identify the actual turbidity, which is spread over a wide area. In this study, a method to quantify the planar distribution of turbidity from aerial images is considered, for the purpose of monitoring turbidity in marine construction projects and predicting its diffusion. In this paper, aerial photographs of turbidity generated in a marine construction was acquired. Then, a method to evaluate the turbidity by the color difference was examined, where the relative value of turbidity between turbid and non-turbid water was calculated using the RGB values of the images. The results showed that the method is capable of indicating the boundary between non-turbid water and low-turbid water among the planar distribution.