Landfill cap models under simulated climate change precipitation : assessing long-term infiltration using the HELP model
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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12
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Environmental Earth Sciences, Volume 83, issue 10, pp. 1-12
Abstract
The Hydrologic Evaluation of Landfill Performance (HELP) model (v 3.04) was used to assess the hydrological performance of two large-scale (~ 80 × 80 × 90 cm) laboratory-based landfill cap models. Desiccation cracking under simulated climate change precipitation (CCP) events was modelled to predict the performance of landfill caps over a 50-year period in Cumbria England, UK. Cumulative infiltration values under different climate conditions were highly sensitive to macro-pore development in the clay liner which is represented by the changing hydraulic conductivity in HELP simulations. Simulation results of cap design 1 (a clay barrier layer only) show that cumulative annual infiltration under normal precipitation (NP) and CCP events, with the initial hydraulic conductivity, ranged between 1 and 2% of the annual precipitation; however, cumulative annual infiltration was 10 to 68% when maximum (degraded) hydraulic conductivity values were used in simulations. A geosynthetic clay liner (GCL) included in cap design 2 significantly reduce cumulative infiltration.Description
Publisher Copyright: © The Author(s) 2024.
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Sinnathamby, G, Phillips, D H, Paksy, A & Halim, M 2024, 'Landfill cap models under simulated climate change precipitation : assessing long-term infiltration using the HELP model', Environmental Earth Sciences, vol. 83, no. 10, 311, pp. 1-12. https://doi.org/10.1007/s12665-024-11604-3