A GIS-based vulnerability assessment of coastal natural hazards,state of Pará, Brazil |
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Authors: | Claudio Szlafsztein Horst Sterr |
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Institution: | (1) Department of Geology, Center of Geosciences, University Federal of Pará, Campus Universitário do Guamá, 66075-110 Belém, PA, Brazil;(2) Institute of Geography, Faculty of Mathematics and Natural Science, Christian Albrecht University, Kiel, Germany |
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Abstract: | Studies carried out in the NE coastal zone of the State of Pará (Brazil) have recorded, in the last 25 years, numerous evidence
of natural impacts of the flood and erosion processes. As a consequence, diverse strategies and measures of population adaptation
have been implemented but with limited success. Therefore, in order to subsidize the Coastal Zone Management Program of Pará,
this paper aims to identify, assess and classify natural and socio-economic vulnerabilities of this coastal zone by means
of a Geographical Information Systems (GIS)-based composite coastal vulnerability index (CVI). In spite of the data problems
and shortcomings, using ESRI’s Arcview 3.2 program, the CVI score, to classify, weight and combine a number of 16 separate
natural and socio-economic variables to create a single indicator provides a reliable measure of differences (5 classes) among
regions and communities that are exposed to similar ranges of hazards. The results are presented in three maps referred to
as Natural, Socioeconomic and Total Vulnerability. The confidence associated with the results obtained, the need to utilize
another variables, and to frequently update the ones used already were analyzed and discussed. |
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Keywords: | Coastal erosion Coastal zone management Disaster assessment |
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