Problems of hazard perception on the steep, urbanised Var coastal floodplain and delta, French Riviera
The French Riviera is a fine example of a densely populated coast characterised by multiple inter-connected hazards related to the tectonic, geomorphic, and climatic context of this Mediterranean margin. The flood-controlled sediment dynamics of the lower valley and delta of the Var river, the most...
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| Publicado no: | URI:https://journals.openedition.org/mediterranee, |
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| Autor principal: | |
| Formato: | Article ou chapitre numérique |
| Idioma: | Anglais |
| Publicado em: |
Méditerranée
2009
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| Acesso em linha: | Accès Université d'Orléans et IFPM Accès Université d'Orléans et IFPM |
| Resumo: | The French Riviera is a fine example of a densely populated coast characterised by multiple inter-connected hazards related to the tectonic, geomorphic, and climatic context of this Mediterranean margin. The flood-controlled sediment dynamics of the lower valley and delta of the Var river, the most important water and sediment supplier to the French Riviera, illustrate the interplay of some of these hazards. Encroachment of space-consuming industrial and administrative estates, and of a dense transport infrastructure, including a major international airport, on the lower river floodplain and delta have resulted in exposure to flooding and sedimentation processes that constitute major hazards on this coast. There has, however, been a rather poor appreciation of these processes, due largely to the lack of data on sediment budgets, on temporary or durable channel sediment storage, especially behind gravel-retention dams, on timescales of suspension and bedload transport, and on the morphodynamics of episodic floods. The paper briefly reviews the inter-connected flood and geomorphic hazards in the lower Var valley, and calls for both more comprehensive data collection on, and a systems approach to, hazard perception and management. |
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