Estimation of impact of sea level rise on land and water resources when data is sparse - case of Colombo. Environment and ecology research
De Costa, Gregory; Dassanayake, Wajira
Citation:De Costa, G. S., & Dassanayake, W. (2016). Estimation of Impact of Sea Level Rise on Land and Water Resources When Data Is Sparse - Case of Colombo. Environment and Ecology Research, 4(5), pp.244-250. doi:10.13189/eer.2016.040502.
Permanent link to Research Bank record:http://hdl.handle.net/10652/3548
This paper highlights investigation and the impacts on the changes in groundwater table caused by sea level rise due to climate change in Wellington New Zealand and translates it to possible impacts in Colombo Sri Lanka. Similarly the possible loss of land due to elevated sea level rise has been investigated. In the past 100 years sea level raised on average by 0.2m in Wellington region and it is predicted that by the 2090 sea level will increase by 0.8 m and by 2115 almost 1m. Therefore an investigation has been carried out by developing a three-dimensional hydrodynamic numerical model. Numerical model was developed using comprehensive groundwater modelling package FEFLOW 6.1. Once the model was developed and calibrated, four scenarios were investigated. Scenario 1 assumed the increase of 0.5 m of the mean seawater level (MSL). Scenario 2, Scenario 3 and Scenario 4 assumed an increase of 1.0 m, 1.5 m and 2.0 m MSL respectively. The changes were compared in nine observation bores and the results are presented. Thereafter taking into consideration the variability of rainfall these estimations have been translated for Colombo. The loss of land is also analysed for those four cases. The loss of the land due to sea level rise was estimated by using ArcGIS (ESRI, 2012). The affected area by the sea level is defined by the corresponding contour, 0.5 m, 1.0 m, 1.5 m and 2.0 m, and the coastline which corresponds to 0 m contour and the sea level at present day. Again these results have been translated to Colombo and presented.
Keywords:Wellington, New Zealand, Colombo, Sri Lanka, water tables, changes to water tables, sea level rise, land loss, modelling
ANZSRC Field of Research:090509 Water Resources Engineering
Copyright Notice:Copyright©2016 by authors, all rights reserved. Authors agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 international License.
Rights:This digital work is protected by the Copyright Act 1994 (New Zealand). It may be consulted by you, provided you comply with the provisions of the Act and the following conditions of use: Any use you make of these documents or images must be for research or private study purposes only, and you may not make them available to any other person. You will recognise the author's and publishers rights and give due acknowledgement where appropriate.
MetadataShow detailed record
This item appears in
The following license files are associated with this item: