Landfill Base Liners: Assessment of Material Equivalency and Impact to Groundwater |
| |
Authors: | Kyriakos Kandris Marina Pantazidou |
| |
Institution: | (1) Faculty of Civil Engineering, Geotechnical Department, National Technical University of Athens, Iroon Polytechniou 9, Zografou, 157 80, Greece; |
| |
Abstract: | This paper gathered available flow and transport solutions and used them for two composite liners, consisting of geomembrane
(GM) overlying either a compacted clay liner (CCL) or a geosynthetic clay liner (GCL). Its aim is to provide a guiding framework
for the possible choices of (a) approaches to bottom liner design, (b) respective analytical solutions to flow and transport
equations, as well as (c) parameters required for each type of solution. On the basis of the obtained results, the following
recommendations are made. When the goal of analysis is to determine material equivalency, leachate flow rate is an adequate
key parameter for GM-CCL composite liners. For GM-GCL composite liners, it is necessary to compute contaminant concentration
or mass flux, considering (a) transport through defects for inorganic contaminants and (b) diffusion and the contribution
of any available attenuation layer for organic contaminants. When the goal of analysis is to assess impact to groundwater,
it is advised to calculate both discharge rate and contaminant mass flux regardless of liner type. The critical parameter
for the transport calculations is the retardation factor of the contaminant, for the case of CCLs, while the results for GCLs
are much less sensitive to this parameter. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|