Reconsidering Landfill Monitoring With The
Aid Of Multivariate Data Analysis
Author(s)
M. van Praagh & K. M. Persson
Abstract
Leachate constitutes the main potential long-term environmental risk of landfill
emissions. The EU landfill directive 1999/31/EC requires minimum monitoring
during the active landfill life and the after-care phase. Due to time and resource
limitations, monitoring of leachate quality is a compromise between information
density and applicability. Samples from passively collected leachate are suspect
to mixing with groundwater and surface water. This is especially true for the
widely used parameter conductivity. The objective of this work is to identify the
extent of major external influences on conductivity monitoring data and its
implications for future monitoring programs. A complete eight year conductivity
monitoring data set from a municipal solid waste landfill in Southern Sweden is
analysed with the help of multivariate data analysis. With the aid of a principle
component analysis (PCA) the influences of surface water, groundwater and
recycled leachate on the complete measurements’ variability is investigated. The
impact of final capping on the variability is clearly reflected. A primary model is
developed for the dependence of conductivity variability on water levels’
variability with the help of a canonical correlation analysis (CCA). On the one
hand, the results allow identification of surplus sampling points. On the other
hand, crucial sampling points are highlighted, which are intensively subject to
processes other than mixing with surface water. Consequently, these results
make way for tailor-made monitoring for comparable landfill situations.
Keywords: landfill monitoring, leachate analysis, multivariate data analysis,
electrical conductivity, final capping, leachate recirculation.
1 Introduction
Landfilling of waste is the major waste management option in the EU. The main
potential long-term environmental risk is posed by leachate emissions.
Keywords
landfill monitoring, leachate analysis, multivariate data analysis,
electrical conductivity, final capping, leachate recirculation.
Related Book
Other papers in this volume
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