Modeling of settlement in saturated and unsaturated municipal landfills

Date

2006-07-01

Author

Durmusoglu, Ertan
Corapcioglu, M.Yavuz
Tuncay, Kağan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

300
views

0
downloads

Municipal solid waste (MSW) landfills are not only used to dispose the refuse in most economical way but also utilized as a viable land in today’s waste management strategy. Settlement prediction is an important issue in order to guarantee the integrity of any postclosure structure on landfills. In this study, landfill settlement in saturated and unsaturated landfills is investigated by developing a one-dimensional mathematical model and performing numerical experiments. Under the saturated conditions, the landfill is considered to be completely liquid saturated by preventing gas generation at all times. On the other hand, for the unsaturated case, we assume that a gas mixture comprised of methane and carbon dioxide is generated as a result of microbial decomposition of MSW deposited. The gas generation is assumed to follow a first-order kinetic approach. The liquid phase and gas mixture are considered compressible as well as the solid matrix (landfill body). After the governing equations were discretized using the Galerkin finite-element method, the Gaussian elimination technique is employed for a solution. In saturated landfills, the settlement is mainly caused by the overburden weight of the waste deposited. Further, the mass loss due to waste decomposition contributes for an additional settlement in unsaturated landfills. The predicted settlements are within the range reported in the literature. The model developed can simulate porosity, pressures, saturations, and stress profiles in settling landfills as well as to predict the transient and ultimate settlements in saturated and unsaturated landfills.

Subject Keywords

Soil Science

URI

https://hdl.handle.net/11511/41022

Journal

International Journal of Geomechanics

DOI

https://doi.org/10.1061/(asce)1532-3641(2006)6:4(269)

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Nitrogen fertilizer leaching from cropped and irrigated sandy soil in Central Turkey Ünlü, Kahraman; Yurteri, C (Wiley, 1999-12-01) Pollution of ground water caused by excessive and uncontrolled use of nitrogen fertilizer is worrying. A recent example of such pollution has been observed in an agricultural basin in the province of Nevsehir, Turkey, where up to 900 kg ha(-1) nitrogen fertilizer is used for growing potatoes in sandy soils under irrigation. Using nitrogen fertilizer in amounts that guarantee large yields without polluting ground water is essential. We present results of field experiments and numerical simulations involving ...
Development of risk based soil quality standards for Turkey İpek, Hatice Meltem; Ünlü, Kahraman; Department of Environmental Engineering (2011) Soil quality standards (SQSs) are one of the most important elements of management system for contaminated sites. In order to manage risks associated with soil contamination, risk based SQSs are used worldwide. However, in Turkey, the Soil Pollution Control Regulation in force was focusing mainly on the use of stabilized sludge on soil and was including standards for a limited number of parameters, mainly metals and some organic chemicals. Thus, existing SQSs were far away from providing common criteria for...
Prediction of swelling behavior of expansive soils using modified free swell index, methylene blue and swell oedometer tests Jaleh Forouzan, Amir; Çokça, Erdal; Department of Civil Engineering (2016) Expansive soils are recognized as problematic soils that impose several challenges for civil engineers. Such soils undergo significant volume change in case water penetrates into them, and they shrink as they lose moisture. Lightly-loaded engineering structures such as pavements, single story buildings, railways and walkways may experience severe damages when they are founded on such soils. Determination of expansive soils and quantifying their swelling potential and pressure caused by their expansion are e...
Development of human health risk-based Soil Quality Standards for Turkey: Conceptual framework İpek, Meltem; Ünlü, Kahraman (2020-09-01) Soil Quality Standards (SQSs) are considered as an important tool for management of contaminated sites. In order to manage adverse effects associated with soil contamination, risk-based SQSs are used worldwide. However, developing health risk-based SQSs is a challenging task. It involves comprehensive assessment of nationwide site characteristics (e.g. soil, hydrogeological, climatic properties), understanding of social behaviors that determine human exposure to soil pollutants (e.g. exposure scenarios and ...
Assessing the influence of sewage sludge and derived-biochar in immobilization and transformation of heavy metals in polluted soil: Impact on intracellular free radical formation in maize Rashid, Muhammad Saqib; Liu, Guijian; Yousaf, Balal; Hamid, Yasir; Rehman, Abdul; Munir, Mehr Ahmed Mujtaba; Arif, Muhammad; Ahmed, Rafay; Song, Yu (2022-09-15) © 2022 Elsevier LtdAs one of the most common ways to get rid of municipal waste, landfill leachate, waste with complicated compositions and high levels of contaminants, has become a significant threat to the world's environment. Here, the impact of sewage sludge (SS) and derived-biochar (SSB) amendments on the immobilization and potential mobility of heavy metals in a contaminated soil-plant system was investigated. The sequential fractionation findings showed that using SS-2%, SSB-2%, and SSBC-1% reduced t...

Citation Formats

E. Durmusoglu, M. Y. Corapcioglu, and K. Tuncay, “Modeling of settlement in saturated and unsaturated municipal landfills,” International Journal of Geomechanics, pp. 269–278, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41022.