Hikaru Shirai

Feature analysis of groundwater discharge points in coastal regions around Mt. Chokaisan, Japan by using alos palsar data

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 have detected groundwater discharge points arising due to the difference in freshwater and seawater by using the Landsat ETM+ and the ALOS AVNIR-2 signals. The ETM+ and AVNIR-2 are passive sensors, and the data taken by the above sensors will be affected by clouds, the limited data are available. In order to understand features of the groundwater discharge points regardless of the weather conditions, this paper analyzes textures obtained from the ALOS PALSAR data. Our experimental results were in considerable agreement with the results obtained from the AVNIR-2 data, and the realities in the study area.