The RiskPoint project “aims to develop a complete risk assessment methodology/tool that can be used to identify and prioritise the clean up and management of point sources of contamination to groundwater and surface water resources”.
The project encompasses five work packages to address the key aspects of the problem. It is also based on a collaboration between academics (DTU, Århus University), and several industrial partners.
HGG is included in the workpackage 1, “Instrumentation and Monitoring”. For all workpackages, the area of interest, Risby, is located in the vicinity of Copenhagen, and consists in a former landfill, active from 1959 to 1981 (household waste).
The group provides its expertise in different geophysical methods, including DC/IP, TEM and MRS. With DC/IP, we aim at delineating the spatial boundaries of the landfill itself. In that purpose, the group tries to have a full control and understanding of the method, ranging from data acquisition to data inversion: we dig into instrumentation, but we also explore some measuring techniques in order to get the best data quality, taking advantage of the group experience in transient EM. An inversion code is currently being developed by researchers of the group for the IP data. At the end, one of the goal is to provide an efficient tool for the characterization of landfills in general.
In parallel, we use TEM data, jointly inverted with DC and IP, to provide an input for the hydrogeological models; the MRS technique is currently used to characterize the hydraulic properties of subsurface.
Thanks to strong joint efforts between the Aarhus University, DTU and industrial partners, some geophysical workshops are often organized in order to mingle the different field expertise and evaluate the advances.