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Long-term oberservation of the performance of a mineral landfill cover

The water balance of a landfill cover consisting of compacted sandy loam was monitored in a test-field on the municipal landfill at Aurach (Bavaria/Germany). Results of the 4-years monitoring period are presented. During summer months almost no liner leakage occurrs. Precipitation is stored temporarily in the soil cover and subsequently leaves the system via evapotranspiration.

In dry summers soil water reduction is recorded down to a depth of 1.2 m in the soil cover. At the start of winter season rainfall is absorbed by the soil. Subsequent rainfalls lead almost instantaneously to substantial leakage. The annual amount of leakage through the mineral cover is mainly dependant on the amount of precipitation during winter months. The results show the limitations of a low-cost landfill cover consisting of only a thick layer of sandy loam. Substantial amounts of the precipitation during winter season percolate through the cover seal into the landfill. The amount of leakage could be reduced by introducing a drainage layer into the capping system and by designing the restoration profile to act as water balance layer.

Autoren:
Dr. Wolf Ulrich Henken-Mellies
Dr.-Ing. Erwin Gartung
Dipl.-Ing. Ministerialrat Franz Defregger

Copyright:	© LGA Bautechnik GmbH
Quelle:	Fachtagungen (Februar 2004)
Seiten:	9
Preis:	€ 0,00
Autor:	Dr. Wolf Ulrich Henken-Mellies Dr.-Ing. Erwin Gartung
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