Effect of Gas on Pore Pressures in Wet Landfills
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 132, Issue 5
Abstract
The waste in a landfill may become saturated due to many reasons, including leachate recirculation or extreme precipitation. As high saturation levels in waste are achieved, the permeability of the waste to landfill gas decreases. This may result in pore pressures that are greater than what would be predicted by fluid statics. A theoretical model for estimating the excess pore pressure at the bottom of saturated waste is derived. A finite difference procedure is then presented as an approximate solution to the model. It was found that below the level of saturation, the steady-state excess pore pressure distribution increases linearly similar to a hydrostatic distribution. Combining its effect with the static water pressure, the excess pore pressure may be accounted for by using an equivalent unit weight of fluid that is artificially higher than water. A parametric study of the input parameters showed that the equivalent unit weight of the pore fluid was highly dependent on the hydraulic conductivity of the waste, particularly if the hydraulic conductivity of the waste is lower than about .
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Acknowledgments
The work presented in this paper is a direct result of funding by the National Science Foundation under Grant 0092700, NCS Consultants, LLC, Tucson, Arizona, and from GeoSyntec Consulting, Inc., Huntington Beach, California. This support is gratefully acknowledged.
References
Barlaz, M. A., Ham, R. K., and Schaefer, D. M. (1989). “Mass-balance analysis of anaerobically decomposed refuse.” J. Environ. Eng., 115(6), 1088–1102.
Beaven, R. P. (2000). “The hydrogeological and geotechnical properties of household waste in relation to sustainable landfilling.” Ph.D. dissertation, Queen Mary and Westfield College, Univ. of London, London.
Brooks, R. H., and Corey, A. T. (1966). “Properties of porous media affecting fluid flow.” J. of Irrigation and Drainage Division, 92(2), 61–90.
DeWalle, F. B., Chian, E. S. K., and Hammerberg, E. (1978). “Gas production from solid waste in landfills.” J. Environ. Eng. Div. (Am. Soc. Civ. Eng.), 104(3), 415–432.
Fredlund, D. G., and Rahardjo, H. (1993). Soil mechanics for unsaturated soils, Wiley, New York, 111–121.
Freeze, R. A., and Cherry, J. A. (1979). Groundwater, Prentice-Hall, Englewood Cliffs, N.J.
Fritz, W. U. (2003). “The effect of gas on pore pressures in wet landfills.” Ph.D. dissertation, Univ. of Arizona, Tucson, Ariz.
Fungaroli, A. A., and Steiner, R. L. (1979). “Investigation of sanitary landfill behavior.” Final Rep., USEPA Rep. EPA-600/2-79-053, Vol. 1, Municipal Environmental Research Laboratory, Cincinnati.
Gonzalez-Garcia, A. J., and Espinosa-Silva, A. (2003). “Doña Juana sanitary landfill catastrophic failure in 1997—Bogotá, Colombia.” Proc., 12th Panamerican Conf. on Soil Mechanics and Geotechnical Engineering, VGE, Essen, Germany, Vol. 2, 1353–1360.
Hendron, D. M., Fernandes, G., Prommer, P. J., Giroud, J. P., and Orozco, L. F. (1999). “Investigation of the cause of the 27September, 1997 slope failure at the Doña Juana landfill.” Proc., Sardinia 1999: 7th Int. Waste Management and Landfill Symp., CISA, Cagliari, Italy, 545–554.
Hornbeck, R. (1975). Numerical methods, Prentice-Hall, Englewood Cliffs, N.J., 185–194.
Hudson, A., Beaven, R. P., and Powrie, W. (2001). “Interaction of water and saturated household waste in a large scale compression cell.” Proc., Sardinia 2001: 8th Int. Waste Management and Landfill Symp., CISA, Cagliari, Italy, Vol. 3, 585–594.
Kavazanjian, E. K. Jr., Hendron, D., and Corcoran, G. T. (2001). “Strength and stability of bioreactor landfills.” Proc., 6th Annual Landfill Symp., Omni Press, Madison, Wis., Solid Waste Association of North America, Silver Spring, Md.
Koerner, G. R., and Koerner, R. M. (1995). “Temperature behavior of field deployed HDPE geomembranes.” Proc., Geosynthetics ’95 Conf., Nashville, Tenn., Industrial Fabrics Association International, St. Paul, Minn., Vol. 3, 921–937.
Koerner, R. M., and Soong, T.-Y. (2000). “Leachate in landfills: The stability issues.” Geotext. Geomembr., 18(5), 293–309.
Korfiatis, G. P., Demetracopoulos, A. C., Bourodimos, E. L., and Nawy, E. G. (1984). “Moisture transport in a solid waste column.” J. Environ. Eng., 110(4), 780–796.
McBean, E. A., Rovers, F. A., and Farquhar, G. J. (1995). Solid waste landfill engineering and design, Prentice-Hall, Englewood Cliffs, N.J., 90–102.
McCreanor, P. T., and Reinhart, D. R. (2000). “Mathematical modeling of leachate routing in a leachate recirculating landfill.” Water Res., 34(4), 1285–1295.
Merry, S. M., Kavazanjian, E. Jr., and Fritz, W. U. (2004). “Reconnaissance of the July 10, 2000, Payatas landfill failure.” J. Perform. Constr. Facil.19(2), 100–107.
Murphy, G. M. (1960). Ordinary differential equations and their solutions, D. Van Nostrand, New York, 25.
Oweis, I., and Khera, R. (1986). “Criteria for geotechnical construction of sanitary landfills.” Int. Symp. on Environmental Geotechnics, H. Y. Fang, ed., Lehigh University Press, Bethlehem, Pa, Vol. 1, 205–222.
Oweis, I. S., Smith, D. A., Ellwood, R. B., and Greene, D. S. (1990). “Hydraulic characteristics of municipal refuse.” 116(4), 539–553.
Reinhart, D. R., and Townsend, T. G. (1998). Landfill bioreactor design and operation, CRC Press, Boca Raton, Fla.
Roberson, J. A., and Crowe, C. T. (1985). Engineering fluid mechanics, 3rd Ed., Houghton Mifflin, Boston, 694–699.
Schroeder, P. R., Dozier, T. S., Zappi, P. A., McEnroe, B. M., Sjostrom, J. W., and Peyton, R. L. (1994). “The hydrologic evaluation of landfill(HELP) model—Engineering documentation for version 3.” Rep., EPA/600/9-94/168b, U.S. Environmental Protection Agency Risk Reduction Engineering Laboratory, Cincinnati.
Thiel, R. (1999). “Design of a gas pressure relief layer below a geomembrane cover to improve slope stability.” Proc., Geosynthetics ’99 Conf., Boston, Industrial Fabrics Association International, St. Paul, Minn., Vol. 1, 235–251.
Wright, S. G. (1996). UTEXASED—Software for slope stability calculations.” Shinoak Software, Austin, Tex.
Zwillinger, D. (1989). Handbook of differential equations, Academic, New York, 120.
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© 2006 ASCE.
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Received: Mar 1, 2004
Accepted: Nov 23, 2004
Published online: May 1, 2006
Published in print: May 2006
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