A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Improved facility management at landfills and waste disposal sites by cover system design analysis
Abstract The cover system is a key factor in the management of waste disposal sites. Traditional methods of cover design based on empirical and semi-quantitative analysis have been improved upon by the effective use of models to assess the evapotranspiration, runoff, and infiltration volumes associated with different cover configurations. The Hydrologic Evaluation of Landfill Performance (HELP) model developed for the United States Environmental Protection Agency allows cover performance prediction with a sound technical basis. The HELP model was used to assess four alternative cover designs ranging from simple, two-layer systems to more complex systems incorporating multiple drainage layers and synthetic membrane barriers. A sensitivity study was performed to determine the relative imcorporating cover design parameters such as clay barrier thickness and hydraulic conductivity, synthetic membrane leakage factor, and the length and slope of drainage layers. The results of the study can be used to identify cover designs that reduce infiltration, increase evapotranspiration, and provide manageable volumes of surface runoff within the site vicinity. The modelling indicated that more complex cover systems are not necessarily superior to simpler ones. Efficient cover systems can be achieved by concentrating the engineering design effort on several critical parameters such as the hydraulic conductivity of clay barriers and the leakage factor of synthetic membranes. Other factors, commonly considered important, such as clay barrier thickness and drainage layer design, appear to be less significant.
Improved facility management at landfills and waste disposal sites by cover system design analysis
Abstract The cover system is a key factor in the management of waste disposal sites. Traditional methods of cover design based on empirical and semi-quantitative analysis have been improved upon by the effective use of models to assess the evapotranspiration, runoff, and infiltration volumes associated with different cover configurations. The Hydrologic Evaluation of Landfill Performance (HELP) model developed for the United States Environmental Protection Agency allows cover performance prediction with a sound technical basis. The HELP model was used to assess four alternative cover designs ranging from simple, two-layer systems to more complex systems incorporating multiple drainage layers and synthetic membrane barriers. A sensitivity study was performed to determine the relative imcorporating cover design parameters such as clay barrier thickness and hydraulic conductivity, synthetic membrane leakage factor, and the length and slope of drainage layers. The results of the study can be used to identify cover designs that reduce infiltration, increase evapotranspiration, and provide manageable volumes of surface runoff within the site vicinity. The modelling indicated that more complex cover systems are not necessarily superior to simpler ones. Efficient cover systems can be achieved by concentrating the engineering design effort on several critical parameters such as the hydraulic conductivity of clay barriers and the leakage factor of synthetic membranes. Other factors, commonly considered important, such as clay barrier thickness and drainage layer design, appear to be less significant.
Improved facility management at landfills and waste disposal sites by cover system design analysis
Hollingshead, S. C. (author) / Kennedy, K. G. (author) / Anderson, E. G. (author)
1988
Article (Journal)
English
Improved facility management at landfills and waste disposal sites by cover system design analysis
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