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|Title:||Assessing coastal erosion risk in a GIS environment|
Gonçalves, J. A.
Santos, M. Arcos
Pinho, José L. S.
Digital Elevation Models
|Citation:||Bio A., Gonçalves J., Santos M., Granja H., Pinho J. L. S., Bastos L. Assessing coastal erosion risk in a GIS environment, 4as Jornadas de Engenharia Hidrograca, pp. 373-376, 978-989-705-097-8, 2016|
|Abstract(s):||Coasts are complex and dynamic zones, susceptible to natural and man-made risk factors and hazards. Impacts will depend on meteo-oceanic conditions (e.g. wave and storm patterns), vulnerability (related with sediments and morphology) and exposure (which depends on coastal orientation and on natural or man-made protective structures). Consequently, even neighbouring beach sectors may show contrasting behaviour because of distinct features. A practical local beach characterization is hence useful for coastal mapping and management. We present procedures for coastal erosion risk assessment in a GIS environment. The effect of exposure on beach dynamics is analysed, considering local characteristics, like shoreline orientation (determined using a poly-line simplification algorithm), beach type and human interventions (determined in-situ), and relating these features to beach dynamics, such as shoreline position, beach area and beach volume determined from successive Digital Elevation Models, using several GIS tools. A case study for the Vila Nova de Gaia coast (Northern Portugal) is presented.|
|Access:||Restricted access (UMinho)|
|Appears in Collections:||C-TAC - Comunicações a Conferências Nacionais|
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