Author(s): Takeshi Takemura, Yuki Uchida, Tomoaki Nakamura, Hirokazu Sumi, Akira Oda, Minoru Ochiai
Keywords: UAV; NDVI; Lansat;
Abstract: Field observation and Aerial photography have been widely used for grasping seaweed growth. In recent years, the utilization of remote sensing is expected to grasp it. It can be observed in a wide area at once, but it is not used to grasp the situation of vegetation growth in the coastal zone. In this study, we investigated to measure the vegetated area of Ulva spp. in Yastsu tidal flat by UAV (Unmanned Aerial Vehicle) and satellite data. Therefore, the NDVI value was corrected for each observation day so as to match the value of the vegetated area at the field. Then, the relationship between the corrected value and the water depth of Yatsu tidal flat was examined. As a result, it was clearly confirmed that the NDVI correction value increases with increasing of water depth. From the result, it was shown that it is possible to grasp the vegetated area by Landsat 7/8 based on the modified NDVI.