ABSTRACT
The oldest of the dumping fields (commissioned in 1982) – the A dumping field – is not fitted with a leachate drainage. Its bottom is proofed with a 50 cm layer of clay. The dumping field scarps have been formed from a layer of construction debris covered with a layer of cultivable soil of 1 m in thickness, seeded with a mixture of grass. Because the B and C dumping fields had been full, municipal waste was temporarily placed in the A field again. While the A dumping field was functioning, liquid outflows (leachates) from the scarps, sometimes forming small streams, were observed. In order to limit the leachate migration, circumferential drainage around the scarp foot of the A field was built. This drainage collects:
– leachates flowing out from the scarp of the A field landfill
– precipitation water or meltwater flowing down the waste hill surface
– surface run-off.
