Investigative strategies and risk assessment of old unlined municipal solid waste landfills

摘要: A case study was carried out at an old landfill site (Riet site) located in Winterthur, northern Switzerland. The Riet contains mainly municipal solid wastes (MSW) comprising four discrete unlined compartments, the oldest of which dates back to 1918. One goal assess investigative techniques used determine risk groundwater contamination. Waste compartments and leachate plumes were delineated with electromagnetic method EM31 tracer methods. most efficient methods for a assessment flow modelling based on reliable hydraulic head conductivity measurements, chemical analyses. Chemical analyses samples showed that older pose only small groundwater. other long-term contamination posed by MSW landfills different ages. To this end, concentrations from compared those various than about 1960 can be considered general considerably smaller younger ones. Age compartment could correlated.