Publicación: Climate change impacts on coastal areas
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Fecha
2009
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info:eu-repo/semantics/openAccess
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Asociación Española para la Enseñanza de las Ciencias de la Tierra, AEPECT
Resumen
El litoral es uno de los medios naturales más transformados por la actividad antrópica, ya sea directa o indirectamente. El 40% de la población mundial vive en la franja costera (un 44% en España), por lo que cualquier alteración del medio natural se convierte en un gran riesgo. Desde la segunda mitad del s.XX, el balance sedimentario ha ido presentando, en general, una tendencia progresivamente negativa debido a actividades humanas, incrementándose los problemas relacionados con la erosión y retroceso costero, a menudo confundidos con una subida del nivel del mar. En los últimos años existe una creciente tendencia a dramatizar sobre el futuro de nuestro litoral, no solo español sino global, a punto de desaparecer por la subida generalizada del nivel del mar que va a arrasar gran parte de los terrenos costeros. Nuestro litoral está enfermo pero para poder entender cuál es el peligro real frente al cambio climático, es necesario entender bien cuál es la problemática concreta de cada sector, es decir cómo es el balance sedimentario real, cuáles son las causas de los posibles desequilibrios, cuál ha sido la tendencia del nivel del mar en un pasado cercano, y sobre todo saber si un determinado sector podría o no adaptarse de forma natural a una subida del nivel del mar, etc. Es decir, tenemos que conocer antes que juzgar.
The littoral fringe is a one of the natural environments more highly transformed by human activities, either direct or indirectly. The 40% of world population lives at the coastal area (40% in Spain), so any alteration of this environment becomes seriously risky. Since the second half of 20th century, sedimentary balance present a progressively higher negative trend mainly due to human activities, with a consequent increasing erosion and coastal retreat, in many cases reported as sea level rise. A wide trend to dramatize has arisen these last decades about what is going to happen with the littoral all over the world, with a wide flooding causing the disappearance of all terrains by the sea. Our littoral is ill, but if we want to know which the real illness is and how should we proceed, first we have to know the real problem in each considered site. We should analyse the sedimentary balance for each location in danger, the causes of the disequilibria, the sea level trend during in a near past, and above all, the adaptation capacity to a sea level rise. We should know before giving a diagnostic.
The littoral fringe is a one of the natural environments more highly transformed by human activities, either direct or indirectly. The 40% of world population lives at the coastal area (40% in Spain), so any alteration of this environment becomes seriously risky. Since the second half of 20th century, sedimentary balance present a progressively higher negative trend mainly due to human activities, with a consequent increasing erosion and coastal retreat, in many cases reported as sea level rise. A wide trend to dramatize has arisen these last decades about what is going to happen with the littoral all over the world, with a wide flooding causing the disappearance of all terrains by the sea. Our littoral is ill, but if we want to know which the real illness is and how should we proceed, first we have to know the real problem in each considered site. We should analyse the sedimentary balance for each location in danger, the causes of the disequilibria, the sea level trend during in a near past, and above all, the adaptation capacity to a sea level rise. We should know before giving a diagnostic.
Descripción
Categorías UNESCO
Palabras clave
Dinámica litoral, cambio climático, morfología costera, nivel del mar, Coastal processes, cimate change, coastal geomorphology, sea level
Citación
Centro
Facultad de Ciencias
Departamento
Ciencias Analíticas
Grupo de investigación
Geología Aplicada al Medio Ambiente (GAMA)