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Landfill Hydrology and Leachate Production
Article · January 1989
DOI: 10.1016/B978-0-12-174255-3.50017-7
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2 authors:
Roberto Canziani
Raffaello Cossu
Politecnico di Milano
University of Padova
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4.1
Landfill Hydrology and Leachate Production
R. CANZIANI* and R. COSSU**
* Institute of Sanitary Engineering, Polytechnic of Milan, Via Fratelli
Gorlini 1, 20151 Milano, Italy
**Institute of Hydraulics, University of Cagliari, Piazza d'Armi,
09100 Cagliari, Italy
INTRODUCTION
The effect of uncontrolled infiltration of leachate into the environment is the
biggest environmental impact that a sanitary landfill can have. For this reason
legislation, at both the local or national level, tends to define methods to
restrict leachate contamination of either surface or ground waters. More
frequently landfills are sited in areas that are naturally impermeable or areas
which have been rendered impermeable by artificial means. It is evident that,
under these conditions, the management of leachate during its percolation,
collection and disposal assumes a critical part in the design of the landfill both
from the technical and from the economic standpoint. In this chapter, factors
governing the production of leachate in controlled landfill sites are examined
and discussed.
HYDROLOGICAL BALANCE AND LEACHATE PRODUCTION
Figure 1 gives an overall summary of the components which make up the
hydrological balance of a controlled landfill (Cossu, 1982). It is immediately
obvious that whatever the methodology adopted for the design of the landfill,
only some of the components of the hydrological balance can be influenced.
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