Detection and feature analysis of groundwater discharge points in coastal regions around Mt Chokaisan, Japan using ALOS AVNIR-2 data

摘要

Submarine groundwater discharges exist in the Japan Sea around Mt Chokaisan, Japan. However, in the coastal regions, the details regarding their properties have not yet been clarified. In our previous study, we detected groundwater discharge points arising due to the differences in freshwater and seawater by using the Landsat ETM+ signals. This study detected the groundwater discharge points by using the ALOS AVNIR-2 data with 10-m spatial resolution, and the details of seawater surface information regarding the submarine groundwater discharge were analysed. The AVNIR-2 results were also compared with the estimation map of the salinity and the ETM+ results.