Abstract
Tidal flats environment of the Yatsushiro Sea is a habitat of various rare species such as Black-faced spoonbill (Platalea minor). In the recent years, this tidal flats environment was getting threatened due to an increase in garbage disposal, dam and other factors. To deal with this problem a number of nature restoration projects were conducted by Yatsushiro River and National Highway Office in the Kumagawa river estuary of Yatsushiro city. One of such projects and its finding are presented in this paper. In the presented study we investigated topographic changes in the tidal flats using small UAV. Then the 3D modelling of the tidal flats topography was performed from the image taken by the drone.
As the result, no significant changes in the topography around small island was detected. However, in 2017, the place tends to be deposited especially on the water-route. In the future, adaptive management will be necessary.
