Abstract
Existing leachate models over–or underestimates leachate generation by up to three orders of magnitude. Practical experiments show that channeled flow in waste leads to rapid discharge of large leachate volumes and heterogeneous moisture distribution. In order to more accurately predict leachate generation, leachate models must be improved. To predict moisture movement through waste, the two–domain PREFLO, are tested. Experimental waste and leachate flow values are compared with model predictions. When calibrated with experimental parameters, the PREFLO provides estimates of breakthrough time. In the short term, field capacity has to be reduced to 0.12 and effective storage and hydraulic conductivity of the waste must be increased to 0.12 and effective storage and hydraulic conductivity of the wasted must be increased to 0.2 and 2.2 cm/s respectively. In the long term, a new modeling approach must be developed to adequately describe the moisture movement mechanisms.
References
[2] Zeiss, C. and M. Uguccioni, 1995. Mechanisms and Patterns of Leachate Flow in Municipal solid Waste Landfills. Journal of Environmental Systems 23(3):247-270.
[3] Zeiss, C. and W. Major, 1993. Moisture flow Through Municipal Solid Waste: Patterns and Characteristics. Journal of Environ-mental Systems 22(3):211-230.
[4] Uguccioni, M., 1995. Moisture Movement through Municipal Solid Waste. Master of Science Thesis, Department of Civil Engineering 118:214-224.
[5] Tchobanoglous, G., H. Theisen, and S. Vigil, 1993. Integrated Solid Waste. Management: Engineering Principles and Management Issues. McGraw-Hill, Toronto, Ontario, Canada.
[6] Bagchi, A., 1989. Design, Construction and Monitoring of Sanitary Landfill. J. Wiley and Sons, New York, New York.
[7] Radix, H., 1993, Landfill Design and Operation Elseiver.
[8] Rao, J., 1998, Environmental Eng. Sharmma Pub., India.
[9] Warren, J., 1997, Sanitary Landfill Design Chartery University Pub.
[10] Environmental Protection Agency Web Site, www.EPA.com.
[11] Green, H., 1998, Leachate Treatment and Control, MC-grew Hill, Pub.
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