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| Besset, Manon; Anthony, Edward J.; Bouchette, Frederic. |
| The inception, growth, and decline of numerous large and small river deltas on Earth have been strongly influenced by human population dynamics and interventions on catchments, notably deforestation and reforestation. Over the last half century, the effects of catchment conditions in determining fluvial sediment supply have been exacerbated or moderated by dams and reservoirs. The sediment balance of river deltas, crucial in terms of delta shoreline stability, advance or retreat, and subsidence, has, in turn, been affected by variations in fluvial sediment supply. The shoreline mobility and resulting subaerial coastal area changes of a selection of 54 of the world's deltas was quantified over 30 years based on data culled from the literature and from... |
| Tipo: Text |
Palavras-chave: River deltas; Delta shoreline mobility; River sediment supply; Dams; Delta vulnerability; Delta erosion. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00504/61529/65524.pdf |
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| Besset, Manon; Gratiot, Nicolas; Anthony, Edward J.; Bouchette, Frédéric; Goichot, Marc; Marchesiello, Patrick. |
| The question of the rampant erosion of the shorelines rimming the Mekong River delta has assumed increasing importance over the last few years. Among issues pertinent to this question is how it is related to mangroves. Using high-resolution satellite images, we compared the width of the mangrove belt fringing the shoreline in 2012 to shoreline change (advance, retreat) between 2003 and 2012 for 3687 cross-shore transects, spaced 100 m apart, and thus covering nearly 370 km of delta shoreline bearing mangroves. The results show no significant relationships. We infer from this that, once erosion sets in following sustained deficient mud supply to the coast, the rate of shoreline change is independent of the width of the mangrove belt. Numerous studies have... |
| Tipo: Text |
Palavras-chave: Mangroves; Mekong river delta; Shoreline erosion; Coastal squeeze; Sediment supply. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00505/61617/65645.pdf |
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