Papers by Javier Benavente
Journal of Coastal Research
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Ciencias Marinas
Introducción En las últimas décadas el incremento en la demanda del uso de las playas con fines r... more Introducción En las últimas décadas el incremento en la demanda del uso de las playas con fines recreativos ha fomentado la realización de estudios sobre los procesos morfodinámicos que actúan sobre éstas, siendo su conocimiento fundamental para una correcta gestión de la erosión costera, el adecuado uso turístico de las playas y el diseño y dimensionamento de cualquier obra de protección (Fucella y Dolan 1996, Komar 1998). El tramo de litoral mediterráneo estudiado en el presente trabajo se localiza entre Ceuta y Cabo Negro (NO de Marruecos) y, durante los últimos años, ha sido objeto de una creciente ocupación turística, consistente esencialmente en la construcción de dos puertos turísticos (Marina Smir y Kabila), urbanizaciones, hoteles y una autovía que se desarrolla paralela a la costa, afectando al cordón dunar y a dos zonas húmedas de gran interés ecológico (Nachite et al. 2004, Anfuso et al. 2004).
Ciencias Marinas
Morphological monitoring of swash bars at different temporal scales was carried out in the southa... more Morphological monitoring of swash bars at different temporal scales was carried out in the southatlantic Spanish coast between Chipiona and Rota. As a result, the main morphometric and morphodynamic characteristics of more than 60 bars were determined. The differences between this type of bars and the classic ridge and runnel were also pointed out. Bars associated with dissipative beaches appeared to be flat, with no siginificant avalanche face. Bars associated to low reflective beaches presented a better development while bars associated to rocky shore-platform beaches showed similar morphologies to those of low reflective beaches. Inner sedimentary structures of bars in dissipative beaches showed laminae parallel to the beach face. When the bars were located at the upper beachface, the avalanche faces showed clear foreset laminae. In this environment, morphodynamics is controlled by different processes depending on wave characteristics, bar form and water level fluctuations during...
Natural Hazards and Earth System Sciences Discussions, 2016
In this study an analysis of storminess and rates of shoreline change is performed and discussed ... more In this study an analysis of storminess and rates of shoreline change is performed and discussed jointly in four geomorphological units of the Gulf of Cádiz (SW Spain) for the period of 1956-2010. For this purpose, storm events are identified based on the following characteristics: wave height above 2.5 m, a minimum duration of 12 h and events with calm periods of less than 24 h were considered as a single event. Subsequently, energy parameters are determined in order to characterize storm-induced impacts. Conversely, geographic information system (GIS) tools are used to measure shoreline changes in aerial photographs and orthophotographs of each site, selecting the high water line as shoreline proxy. Each geomorphological unit is divided into different behavioural patterns according to recorded coastal changes, so that each one shows a particular behaviour. In general the variability of shoreline changes that is explained by storms and the relation between storm parameters and coastal changes present better results in exposed areas (Cádiz and Vistahermosa) than in sheltered areas (Valdelagrana spit barrier) because the former are more sensitive to storm impacts. On the contrary, in areas where there is no relation between coastal changes and storm parameters (Valdelagrana and Sancti Petri sand spit), it is suggested that anthropogenic factors are the main forcing agents determining shoreline behaviour. However, in these areas the storminess also modulates coastline recession by increasing erosion when the number of storms is high.
Storm thresholds for the Spanish Gulf of Cádiz coast
In this study critical thresholds are defined for storm impacts along the Spanish coast of the Gu... more In this study critical thresholds are defined for storm impacts along the Spanish coast of the Gulf of Cádiz. The thresholds correspond to the minimum wave-tidal conditions necessary to produce significant morphological changes on beaches and dunes and/or damage on coastal ...
Storm thresholds for the Spanish Gulf of C�diz coast
Ocean Coastal Management, 2014
A community's adaptive capacity in relation to a rapidly changing coastline is strongly related t... more A community's adaptive capacity in relation to a rapidly changing coastline is strongly related to the perception of environmental risks. Such perceptions are, however, not well understood at the level of communities and have seldom been compared from one country to another. A framework for natural hazard perception is presented using the concept of functional awareness. This level of consciousness sufficient to influence behaviour is represented by a set of indicators that reflect the perception 1) of dreadfulness, 2) of uncertainty and 3) behavioural change. We conducted a survey (n ¼ 125) in three communities exposed to coastal erosion and coastal flooding in Avignon (Quebec), Kilkeel (Northern Ireland) and Chipiona (Andalucia) to measure three themes: 1) the citizen's general knowledge about coastal change, 2) the perception of coastal changes in their community compared to that reported in the scientific literature and 3) their preferences for adaptation solutions. Multivariate analysis was used to identify the main socio-demographical descriptors. The main factors that influence perception were the site characteristics, the cultural experience of the coast, educational level, and duration in the community. Accounting for all three communities, the functional awareness scores exposed that the weakest ability lays in the fragmentation of preferences towards potential solutions. For Kilkeel and Chipiona, this was related to the difficulty of accurately identifying the environmental hazard trends and a lower degree of personal experience of coastline change. In Avignon, which is more functionally aware, partly thanks to targeted education & information and repeated experiences of hazards, the fragmentation of solution preferences would rather be related to inner community variation. Robustly used in these three countries, the functional awareness framework helped identify each community perception breaks and could be used to identify activities to strengthen community adaptive capacity.
Analysis of the Role Distribution and Participation in Sustainable Natural Hazard Risk Governance: a Call for Active Participation
Cuaternario Y Geomorfologia Revista De La Sociedad Espanola De Geomorfologia Y Asociacion Espanola Para El Estudio Del Cuaternario, Jul 1, 2014
Derechos de reproducción bajo licencia Creative Commons 3.0. Se permite su inclusión en repositor... more Derechos de reproducción bajo licencia Creative Commons 3.0. Se permite su inclusión en repositorios sin ánimo de lucro. Caracterización de la inundabilidad en el estuario del río Guadalete: efecto combinado de mareas y crecidas fluviales flood hazard characterization in the guadalete estuary: combined effect of the tide and the river flow
Impacto socio-económico de los riesgos costeros en el litoral de El Puerto de Santa María (Cádiz)
ABSTRACT
Respuesta diferencial de playas regeneradas en la Bahía de Cádiz
Efectos de los temporales sobre las playas de la Bahía de Cádiz
Cuadernos Laboratoiro Xeoloxico de Laxe
Evolución geomorfológica del entorno de “El Retamar”
Towards a sustainable beach nourishment: goals and failures in the Bay of Cádiz
Journal of Coastal Conservation
Coastal erosion in SW Spain is affecting man-made structures and beaches that represent an import... more Coastal erosion in SW Spain is affecting man-made structures and beaches that represent an important economic resource in the area. In the last decade the Spanish government carricd out several nourishment works that have limited durahility. i\:!ost of the artificial beach fills consist of a spill of natural dredged sand on the visihle beach. leading to a tlat. anificial herm with an important seaward slope and a narrow foreshore. As a result, the initial dissipative profile was transformed into a fully reflective one. A beach monitoring program was carried out to record morphological evolution after the nourishment \I/orks. Several field assessments of disturbance depth were a!so made to characterize beach morphodynamics of a nourished beach (Rota) and a natural dissi pati ve one (Tres Piedras). whose slope \vas similar to the pre-nourishment gradient of Rota beach. Natural dissipative beaches were characterized by spilling breakers that did not signifi-C:l!1tlyaffect bottom sand. The severe erosion recorded in the nourished zones \I,:as related to the new morphodynamic rcgime acting on these beaches. which was controlled by high erosive plunging breakers associated with high foreshore slopes. In conclusion. other nourishment practices should be used. better adapted to the natural beach morphodynamics of thc zone. taking also into account the original grain size and density of the beach sands, in order to obtain more durable artificial beaches.
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Papers by Javier Benavente