AN AUTOMATIC AND CONTINUOUS MONITARING SYSTEM FOR FLOATING-LITTER TRANSPORT IN RIVER AND ITS APPLICATION TO FIELD SURVEY IN MOGAMI RIVER

Abstract

Most of marine debris are mainly supplied from inland area, however there is no monitoring data for floating-litter transport from river to ocean due to no appropriate monitoring methods. In this study, we developed an automatic and continuous monitoring technique for floating-litter transport L in rivers by using an image monitoring and an image processing technique in which a scatter- and mass-type of litters are separately analyzed. The results indicated that L evaluated by the present methods were in good agreement with the observed data in the Mogamigawa River, demonstrating the fundamental performance of the present monitoring method.