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Waste-composition-dependent HBM model parameters based on degradation experiments (2018)
Journal Article
Datta, S., Zekkos, D., Fei, X., & McDougall, J. (2021). Waste-composition-dependent HBM model parameters based on degradation experiments. Environmental Geotechnics, 8(2), 124-133. https://doi.org/10.1680/jenge.18.00014

Municipal solid waste (MSW) is biodegradable in landfills under anaerobic conditions. The evolution of the hydro-biochemical-mechanical (HBM) processes during degradation is investigated first through experiments and subsequently via modelling. Thr... Read More about Waste-composition-dependent HBM model parameters based on degradation experiments.

Experimental Assessment and Modelling of Coupled Biochemical-Physical-Mechanical Biodegradation Process of a Municipal Solid Waste Sample from Michigan (2017)
Presentation / Conference Contribution
Datta, S., Zekkos, D., Fei, X., & McDougall, J. (2017, September). Experimental Assessment and Modelling of Coupled Biochemical-Physical-Mechanical Biodegradation Process of a Municipal Solid Waste Sample from Michigan. Presented at Coupled Phenomena in Environmental Geotechnics, Leeds

Municipal solid waste (MSW) is biodegradable in landfills under anaerobic conditions. The evolution of the biochemical, physical and mechanical characteristics of MSW are interdependent and is investigated first through an experiment and subsequently... Read More about Experimental Assessment and Modelling of Coupled Biochemical-Physical-Mechanical Biodegradation Process of a Municipal Solid Waste Sample from Michigan.

Settlement-The Short and the Long of it (2011)
Presentation / Conference Contribution
McDougall, J. (2008, March). Settlement-The Short and the Long of it. Presented at International Symposium on Waste Mechanics

Total settlement in municipal solid waste (MSW) landfills can be considerable, from 25% to 50% of original fill thickness (Bjarngard and Edgers, 1990). Some occurs very quickly, i.e. during the filling phase (or short term), but there remains a signi... Read More about Settlement-The Short and the Long of it.

Mass loss and landfilled waste mechanics. (2009)
Presentation / Conference Contribution
McDougall, J. (2009, March). Mass loss and landfilled waste mechanics. Presented at Third International Workshop "Hydro-Physico-Mechanics of Landfills"

The impact of mass loss on a particulate medium is investigated. Through a series of laboratory tests on a partly soluble sand, the quantitative impact of mass loss is measured at different applied loads. It is shown that for the material in question... Read More about Mass loss and landfilled waste mechanics..

Landfill modelling challenge: HBM modelling predictions (2008)
Journal Article
McDougall, J. (2008). Landfill modelling challenge: HBM modelling predictions. Proceedings of the ICE - Waste and Resource Management, 161, 147-153. https://doi.org/10.1680/warm.2008.161.4.147

Two laboratory-scale consolidating anaerobic reactors were commissioned, constructed and monitored by Southampton University's waste research group to investigate the long-term behaviour of decomposing waste. The reactor tests were run for 919 days w... Read More about Landfill modelling challenge: HBM modelling predictions.

Geomechanics and Long-Term Landfill Settlement (2008)
Presentation / Conference Contribution
McDougall, J. (2008, March). Geomechanics and Long-Term Landfill Settlement. Presented at GeoCongress 2008

Long term landfill settlement is commonly attributed to two phenomena: creep and biodegradation. Biodegradation, which may contribute the greater proportion of long‐term settlement, is a function of a range of factors, many of which are not easily as... Read More about Geomechanics and Long-Term Landfill Settlement.

Sustainable landfill: the role of fail-safe engineering for landfill aftercare. (2007)
Presentation / Conference Contribution
Hall, D. H., McDougall, J., Drury, D., Blakey, N., Braithwaite, P., & Rosevear, A. (2007, October). Sustainable landfill: the role of fail-safe engineering for landfill aftercare. Presented at Eleventh International Waste Management and Landfill Symposium,

The route to sustainable landfill while adhering to the Landfill Directive requires that ultimately, the waste site will reach equilibrium status. Chemical equilibrium is part of the requirements, but hydraulic equilibrium must also play a role. The... Read More about Sustainable landfill: the role of fail-safe engineering for landfill aftercare..

Assessment of landfill settlement data for evaluation of a hydro-bio-mechanical settlement model. (2007)
Presentation / Conference Contribution
Needham, A., Jones, D. R. V., McDougall, J., Dixon, N., Braithwaite, P., & Rosevear, A. (2007, October). Assessment of landfill settlement data for evaluation of a hydro-bio-mechanical settlement model. Presented at Eleventh International Waste Management and Landfill Symposium,

A hydro-bio-mechanical (HBM) model of waste degradation has been under development for several years to simulate the actual processes involved in the settlement of landfilled wastes. The objective of this current research is the further development o... Read More about Assessment of landfill settlement data for evaluation of a hydro-bio-mechanical settlement model..

A hydro-bio-mechanical model for settlement and other behaviour in landfilled waste (2007)
Journal Article
McDougall, J. (2007). A hydro-bio-mechanical model for settlement and other behaviour in landfilled waste. Computers and Geotechnics, 34(4), 229-246. https://doi.org/10.1016/j.compgeo.2007.02.004

A conceptual framework for the analysis of settlement and other processes in landfilled waste in relation to coupled hydraulic, biodegradation and mechanical behaviour is presented. The hydraulic model is an unsaturated flow model. The biodegradation... Read More about A hydro-bio-mechanical model for settlement and other behaviour in landfilled waste.

Unsaturated hydraulic conductivity of landfilled waste. (2006)
Presentation / Conference Contribution
Kazimoglu, Y. K., McDougall, J., & Pyrah, I. (2006, April). Unsaturated hydraulic conductivity of landfilled waste. Presented at Fourth International Conference on Unsaturated Soils, Carefree, Arizona, USA

Unsaturated flow modelling of landfill hydraulics is a potentially valuable tool for the prediction of leachate discharge rates, design of leachate control systems and simulation of biodegradation in engineered landfills. Such an approach requires in... Read More about Unsaturated hydraulic conductivity of landfilled waste..

Moisture retention and movement in landfilled waste (2005)
Presentation / Conference Contribution
Kazimoglu, Y. K., McDougall, J., & Pyrah, I. (2005, May). Moisture retention and movement in landfilled waste. Presented at International Conference on Problematic Soils, GEOPRPOB 2005

No abstract available.

Options for modelling hydraulic hysteresis (2004)
Presentation / Conference Contribution
Kazimoglu, Y. K., McDougall, J., & Pyrah, I. (2004, June). Options for modelling hydraulic hysteresis. Presented at Second International Workshop on Unsaturated Soils, Anacapri, Italy

Decomposition and settlement in landfilled waste and other soil-like materials (2004)
Journal Article
McDougall, J. R., Pyrah, I. C., Yuen, S. T. S., Monteiro, V. E. D., Melo, M. C., & Jucá, J. F. T. (2004). Decomposition and settlement in landfilled waste and other soil-like materials. Géotechnique, 54(9), 605-609. https://doi.org/10.1680/geot.54.9.605.56937

The term ‘soil-like materials’ is used to refer to particulate materials that contain organic or other non-inert solids. When these materials decompose, there is a reduction in solid phase volume and an induced change in void phase volume, the combin... Read More about Decomposition and settlement in landfilled waste and other soil-like materials.

Extended phase relations and load effects in MSW (2004)
Journal Article
McDougall, J., Pyrah, I., & Yuen, S. T. S. (2004). Extended phase relations and load effects in MSW. Waste Management, 24(3), 251-257. https://doi.org/10.1016/j.wasman.2003.10.009

The moisture retention and compression characteristics of municipal solid waste under self-weight are likened to those of an unsaturated soil. By assuming that the solid organic fraction in waste retains a relatively immobile micropore moisture and t... Read More about Extended phase relations and load effects in MSW.