抄録
In this study, we propose a saving, economic and safe measurement on the topography change and the spatial distribution of water temperature and salinity at urban river mouth. Study site is Akashi river mouth in Hyogo prefecture, JAPAN. From the observation by camera monitoring and portable GPS survey, it was clarified the shape of river mouth bar was drastically changed by the flood. The results of observation by the radio control boat show that the existence of water-route at the site of right bank and deposition trend of river bed after the flooding. In addition, the relationship between salinity behavior and river mouth closure was confirmed by continuous monitoring at the right bank.
