Vulnerability Assessment of a Coastal Dune System at S?o Francisco do Sul Island, Santa Catarina, Brazil

World Multidisciplinary Earth Sciences Symposium 2016

Alquini, Fernanda^1 ; Bertoni, Duccio^1 ; Sarti, Giovanni^1 ; Ciccarelli, Daniela^2 ; Pozzebon, Alessandro^3 ; De Melo, João Carlos Ferreira^4 ; Vieira, Celso Voos^4

Department of Earth Sciences, University of Pisa, Via S. Maria 53, Pisa

56126, Italy^1

Department of Biology, University of Pisa, Via Luca Ghini 13, Pisa

56126, Italy^2

Department of Information Engineering and Mathematical Science, University of Siena, Via Roma 56, Siena

53100, Italy^3

Department of Biology, University of the Region of Joinville, rua Paulo Malschitzki 10, Joinville

89219-710, Brazil^4

关键词: Eastern side;    Environmental change;    Human effects;    Parabolic dune;    System conditions;    Vegetation condition;    Vulnerability assessments;    Vulnerability index;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/44/5/052028/pdf
DOI  :  10.1088/1755-1315/44/5/052028

来源: IOP

【 摘 要 】

In this paper a Coastal Dune Vulnerability Index (CDVI) has been applied on a beach located in the eastern side of Sao Francisco do Sul Island (Brazil). The aim of this study is to assess the vulnerability of a coastal dune system and to identify the areas that result most sensitive to environmental changes. The CDVI has been applied along six transects traced out on two sectors that have been selected based on dune characteristics: Zone A is characterized by well developed parabolic dunes, whereas Zone B is characterized by transverse dunes. The analysis involved 51 quantitative and qualitative variables, divided into five groups: geomorphological dune system condition, marine influence, Aeolian effect, vegetation condition and human effect. The total CDVI was computed as the unweighted average of the partial vulnerability indices. In summary, the total vulnerability can be classified as medium: the geomorphological factor must be monitored at Grande beach, in particular the blowouts in Zone A and the frontal dune retreat in Zone B. The results of the study confirm that the management of coastal areas might be improved using a tool such as the CDVI, which can be easily applied on a regular basis to take under control the factors that mostly affect the evolution of the site.