Abstract
Aerial photogrammetry for tidal flat was carried out at about 5 m high with a camera attached with an APS-C digital camera at the end of a pole with a total length of 7.5 m. It became clear that it was distributed. We can estimate the suction distribution of the sandbar occurred on the tidal flats from the relation between the specific height of the ground and suction by photogrammetry and this very close agreement with the distribution of Scopimera globosa depending on suction did. As a result of one-dimensional flow calculation of groundwater, we could explain the suction observed at the site. It was thought that it is possible to estimate the habitable range of suction-dependent benthos on sandy tidal flats in a wider range by aerial photogrammetry by drone and groundwater flow calculation.
