1887

Abstract

In the context of landfill mining, we conducted electrical resistivity tomography (ERT), borehole electromagnetics (EM39), and magnetometry campaigns to characterise the subsurface of a waste deposit. The electrical resistivity structures in the landfill appear tabular with a first layer (12-15 m) characterised by higher resistivities (> 10 ohm.m; with spots > 30 ohm.m) whereas the saturated zone (below 15 m) presents lower resistivities (< 4 ohm.m). Based on ERT images, we positioned 6 drillings, collected waste samples, and recorded in-situ measurements (distributed temperature and EM39) to confirm the ERT interpretation and bring out some limitations of the method. Magnetic field data were recorded in the same area. We noticed a clear distinction between the inside (high magnetic field gradient) and the outside (low variation) of the landfill. The large scale variation of the total magnetic field is compatible with the existence of a clinker dam below the landfill bottom membrane (known from historical information). Therefore, magnetometry could be used to detect variation in the waste composition (clinker, metallic drums, or municipal waste) but is also a cheap and powerful tool to map unknown landfill boundaries. Both aspects are crucial in the context of landfill mining.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20131420
2013-09-09
2024-03-29
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20131420
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error