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| Titel |
Coastal vulnerability assessment of Puducherry coast, India, using the analytical hierarchical process |
| VerfasserIn |
R. Mani Murali, M. Ankita, S. Amrita, P. Vethamony |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 12 ; Nr. 13, no. 12 (2013-12-16), S.3291-3311 |
| Datensatznummer |
250085586
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| Publikation (Nr.) |
 copernicus.org/nhess-13-3291-2013.pdf |
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| Zusammenfassung |
| As a consequence of change in global climate, an increased frequency of natural hazards such as storm surges, tsunamis and cyclones, is predicted to have
dramatic affects on the coastal communities and ecosystems by virtue of the
devastation they cause during and after their occurrence. The tsunami of
December 2004 and the Thane cyclone of 2011 caused extensive human and
economic losses along the coastline of Puducherry and Tamil Nadu. The
devastation caused by these events highlighted the need for vulnerability
assessment to ensure better understanding of the elements causing different
hazards and to consequently minimize the after- effects of the future
events. This paper demonstrates an analytical hierarchical process (AHP)-based approach to coastal vulnerability studies as an improvement to the
existing methodologies for vulnerability assessment. The paper also
encourages the inclusion of socio-economic parameters along with the
physical parameters to calculate the coastal vulnerability index using AHP-derived weights. Seven physical–geological parameters (slope, geomorphology,
elevation, shoreline change, sea level rise, significant wave height and
tidal range) and four socio-economic factors (population,
land use/land cover (LU/LC), roads and location of tourist areas) are
considered to measure the physical vulnerability index (PVI) as well as the
socio-economic vulnerability index (SVI) of the Puducherry coast. Based on
the weights and scores derived using AHP, vulnerability maps are prepared to
demarcate areas with very low, medium and high vulnerability. A combination
of PVI and SVI values are further utilized to compute the coastal vulnerability index (CVI). Finally, the various coastal segments are grouped
into the 3 vulnerability classes to obtain the coastal vulnerability map.
The entire coastal extent between Muthiapet and Kirumampakkam as well as the
northern part of Kalapet is designated as the high vulnerability zone, which
constitutes 50% of the coastline. The region between the southern coastal
extent of Kalapet and Lawspet is the medium vulnerability zone and the remaining
25% is the low vulnerability zone. The results obtained enable the
identification and prioritization of the more vulnerable areas of the region in order to further
assist the government and the residing coastal communities in better coastal
management and conservation. |
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