10:45 AM - 11:00 AM
[HCG31-07] Focus points of post-closure monitoring in geological disposal
Keywords:Groundwater, Closure of underground facility, monitoring
As the groundwater level declined due to the construction and operation of the Mizunami URL, mixing of deep high-salinity groundwater and shallow low-salinity groundwater occurred in the monitoring section of conglomerate layer. In this section, groundwater flow will change again as water pressure recovers after closure of the Mizunami URL. Therefore, we should extract hydrogeologically important sections such as the conglomerate layer and select it as the observation section of post-closure monitoring.