Groundwater table response to sea level rise and its impact on pavement structure

Roshani, Atena, Mirfenderesk, Hamid, Rajapakse, Jay, & Gallage, Chaminda (2015) Groundwater table response to sea level rise and its impact on pavement structure. In Barnes, Paul H. (Ed.) 9th Annual International Conference of the International Institute for Infrastructure Renewal and Reconstruction (8-10 July 2013)., Queensland University of Technology, Brisbane, Australia, pp. 531-538.

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Abstract

It has been predicted that sea level will rise about 0.8 m by 2100. Consequently, seawater can intrude into the coastal aquifers and change the level of groundwater table. A raise in groundwater table due to seawater intrusion threats the coastal infrastructure such as road pavements. The mechanical properties of subgrade materials will change due to elevated rise of groundwater table, leading to pavement weakening and decreasing the subgrade strength and stiffness.

This paper presents an assessment of the vulnerability of subgrade in coastal areas to change in groundwater table due to sea-level rise. A simple bathtub approach is applied for estimating the groundwater level changes according to sea-level rise. Then the effect of groundwater level changes on the soil water content (SWC) of a single column of fine-sand soil is simulated using MIKE SHE. The impact of an increase in moisture content on subgrade strength/stiffness is assessed for a number of scenarios.

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ID Code: 70990
Item Type: Conference Paper
Refereed: Yes
Additional Information: Conference held July 2013. Proceedings published online March 2015.
Keywords: Seawater Intrusion, Bathtub Approach, Groundwater, Subgrade Performance, Resilient Modulus, CEDM
ISBN: 9781921897733
Divisions: Current > Research Centres > Centre for Emergency & Disaster Management
Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Faculty of Health
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Current > Schools > School of Public Health & Social Work
Copyright Owner: Copyright 2013 Queensland University of Technology
Deposited On: 05 May 2014 04:09
Last Modified: 09 Apr 2015 20:05

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