地下水・雪氷

[II-50] Effectiveness of preliminary survey contributing to selection of optimum groundwater drainage method in development of "Yachi" under the influence of shallow groundwater

*柏木 流音¹、吉川 慎平¹、小田 幸子¹、杉原 弘恭¹ (1. 自由学園最高学部（大学部）)

Keywords:Yachi, Shallow groundwater, Observation wells, Underground water observation, Field survey

"Yachi" is generally wet and not suitable for land use due to the effect of shallow groundwater. When using such land, consider a method for lowering groundwater such as culvert drainage. However, "Yachi" is suspected of uneven groundwater distribution affected by topography.
In this study, observation wells were installed at high density in the study stage of groundwater drainage measures in the survey area. As a result, the detailed undulation of the groundwater level was caught. This has made it possible to provide data that contributes to the selection of the optimal drainage method.