シラス漁船を利用した広域・高頻度海底地形図の作成とその応用に関する研究

抄録

The bathymetry data with high precision are derived from multi-beam echo sounder, but this survey is unsustainable for of bathymetry monitoring because of high cost. In this study, we suggest the method to get changes of the bathymetry in a wide area using fish finder data of whitebait fishing boats. This method is low-cost, but possible to operate frequent monitoring. The depth differences of several ten centimeters are shown between fish finder and multi-beam sonar. However, it is confirmed that increasing the data density in space makes the differences smaller and the trend of sea bottom both the bathymetry is pretty similar.