Takeshi Takemura

STUDY ON ESTIMATION METHOD OF VEGETATED AREA OF ULVA SPP. BY USING NDVI

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.

Survey of Disaster Preparedness in Municipalities in Chiba Prefecture and Study on Ability to Respond to Disasters

In this study, a survey by questionnaire was conducted on the realities of disaster preparedness in 54 municipalities in Chiba Prefecture and six municipalities on the coast of Ibaraki Prefecture. In the study, the knowledge and ability to respond smoothly to a disaster were also examined based on the survey results. There was a significant difference between municipalities in Chiba Prefecture in 2013 in terms of whether they had the standards and process for issuing evacuation orders or not. The ability to respond to a disaster is an important ability for implementing appropriate disaster preparedness for challenges relating to disasters. The ability to respond to a disaster is defined as consisting of specialized knowledge and skills in civil engineering.