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.

Estimating degradation-related settlement in two landfill-reclaimed soils by sand-salt analogues (2018)
Journal Article
McDougall, J., Fleming, I., Thiel, R., Dewaele, P., Parker, D., & Kelly, D. (2018). Estimating degradation-related settlement in two landfill-reclaimed soils by sand-salt analogues. Waste Management, https://doi.org/10.1016/j.wasman.2018.04.013

Landfill reclaimed soil here refers to largely degraded materials excavated from old landfill sites, which after processing can be reinstated as more competent fill, thereby restoring the former landfill space. The success of the process depends on... Read More about Estimating degradation-related settlement in two landfill-reclaimed soils by sand-salt analogues.

Experimental Assessment and Modelling of Coupled Biochemical-Physical-Mechanical Biodegradation Process of a Municipal Solid Waste Sample from Michigan (2017)
Conference Proceeding
Datta, S., Zekkos, D., Fei, X., & McDougall, J. (2017). Experimental Assessment and Modelling of Coupled Biochemical-Physical-Mechanical Biodegradation Process of a Municipal Solid Waste Sample from Michigan. In Proceedings of the 2nd Symposium on Coupled Phenomena in Environmental Geotechnics (CPEG2), Leeds, UK 2017

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)
Conference Proceeding
McDougall, J. (2011). Settlement-The Short and the Long of it. In D. Zekkos (Ed.), Geotechnical Characterization, Field Measurement, and Laboratory Testing of Municipal Solid Waste (76-111). https://doi.org/10.1061/41146%28395%293

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.

Waste heterogeneity: an obstacle to models? (2009)
Conference Proceeding
McDougall, J. (2009). Waste heterogeneity: an obstacle to models?. In Sardinia 2009, 12th International Waste Management and Landfill Symposium

No abstract available.

Mass loss and landfilled waste mechanics. (2009)
Conference Proceeding
McDougall, J. (2009). Mass loss and landfilled waste mechanics.

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..

Predicting long-term settlement of landfills using a fundamental model of waste behaviour. (2008)
Conference Proceeding
Needham, A., Fownes, G. J., McDougall, J., & Braithwaite, P. (2008). Predicting long-term settlement of landfills using a fundamental model of waste behaviour.

Fail-safe engineering for landfill aftercare: towards sustainable waste management? (2008)
Journal Article
Hall, D. H., Drury, D., & McDougall, J. (2008). Fail-safe engineering for landfill aftercare: towards sustainable waste management?. Geological Society Special Publications,

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)
Conference Proceeding
McDougall, J. (2008). Geomechanics and Long-Term Landfill Settlement. In GeoCongress 2008: Geotechnics of Waste Management and Remediation Proceedings of sessions of GeoCongress 2008 (482-490). https://doi.org/10.1061/40970%28309%2924

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.

Assessment of landfill settlement data for evaluation of a hydro-bio-mechanical settlement model. (2007)
Conference Proceeding
Needham, A., Jones, D. R. V., McDougall, J., Dixon, N., Braithwaite, P., & Rosevear, A. (2007). Assessment of landfill settlement data for evaluation of a hydro-bio-mechanical settlement model.

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..

Sustainable landfill: the role of fail-safe engineering for landfill aftercare. (2007)
Conference Proceeding
Hall, D. H., McDougall, J., Drury, D., Blakey, N., Braithwaite, P., & Rosevear, A. (2007). Sustainable landfill: the role of fail-safe engineering for landfill aftercare.

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..

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, 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..

Hydro-bio-mechanical modelling of landfilled waste: decomposition, density and moisture retention (2006)
Conference Proceeding
McDougall, J. (2006). Hydro-bio-mechanical modelling of landfilled waste: decomposition, density and moisture retention. In Numerical Methods in Geotechnical Engineering (167-171). https://doi.org/10.1201/9781439833766.ch25

Unsaturated hydraulic conductivity of landfilled waste. (2006)
Conference Proceeding
Kazimoglu, Y. K., McDougall, J., & Pyrah, I. (2006). Unsaturated hydraulic conductivity of landfilled waste. . https://doi.org/10.1061/40802%28189%29127

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..

Hydro-bio-mechanical modelling of landfilled waste: formulation and testing. (2005)
Conference Proceeding
McDougall, J., & Hay, J. (2005). Hydro-bio-mechanical modelling of landfilled waste: formulation and testing.

Moisture retention and movement in landfilled waste (2005)
Conference Proceeding
Kazimoglu, Y. K., McDougall, J., & Pyrah, I. (2005). Moisture retention and movement in landfilled waste. In Proceedings of the International Conference on Problematic Soils: GEOPRPOB 2005 (307-314)

No abstract available.

Options for modelling hydraulic hysteresis (2004)
Conference Proceeding
Kazimoglu, Y. K., McDougall, J., & Pyrah, I. (2004). Options for modelling hydraulic hysteresis. In A. Tarantino, & C. Mancuso (Eds.), Unsaturated Soils - Advances in Testing, Modelling and Engineering Applications (71-82). https://doi.org/10.1201/9780203970805.ch6

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.