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trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Ajouter le résultat dans votre panier Affiner la rechercheEaux, poissons et pouvoirs: un siècle de gestion des échanges mer-lagune en Camargue. / Paul Allard in Natures, Sciences, Sociétés / Cairn.info et NSS-Journal.org, 9 - 1 (01/01/2001)
Impact of dams and climate change on suspended sediment flux to the Mekong delta / G. Bussi in Science of the Total Environment, vol. 755, Part 1 (February)
Titre : Impact of dams and climate change on suspended sediment flux to the Mekong delta Type de document : objet à 3 dimensions, artefacts, ... Auteurs : G. Bussi ; T. Berchoux ; C. Hutton ; C.R. Hackney ; G. Vasilopoulos ; H.E. Voepel ; S.J. Dadson ; L. Jin ; P.G. Whitehead ; S.E. Darby ; A. Nicholas ; D.R. Parsons Année de publication : 2021 Article en page(s) : p. 1-12 Langues : Anglais (eng) Langues originales : Anglais (eng) Catégories : C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Génie civil, militaire et minier:Technologie hydraulique:Structure hydraulique:Barrage ; F POPULATIONS - ETUDES DE CAS:Models ; S SCIENCES ET TECHNIQUES:Géographie et océanographie:Géomorphologie:Topographie:Forme terrestre:Zone côtière:Delta ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatique ; S SCIENCES ET TECHNIQUES:Sciences de la terre:Géodynamique:Sédimentation ; S SCIENCES ET TECHNIQUES:Sciences de la terre:Sciences du sol:Fertilité du sol Mots-clés : 07 - ENVIRONNEMENT 7.6 - Changement Climatique DAMS DELTAS WATERSHEDS BASSIN VERSANT SOIL FERTILITY CLIMATIC CHANGE MODELE SOUTH EAST ASIA ASIE DU SUD EST Résumé : The livelihoods of millions of people living in the world's deltas are deeply interconnected with the sediment dynamics of these deltas. In particular a sustainable supply of fluvial sediments from upstream is critical for ensuring the fertility of delta soils and for promoting sediment deposition that can offset rising sea levels. Yet, in many large river catchments this supply of sediment is being threatened by the planned construction of large dams. In this study, we apply the INCA hydrological and sediment model to the Mekong River catchment in South East Asia. The aim is to assess the impact of several large dams (both existing and planned) on the suspended sediment fluxes of the river. We force the INCA model with a climate model to assess the interplay of changing climate and sediment trapping caused by dam construction. The results show that historical sediment flux declines are mostly caused by dams built in PR China and that sediment trapping will increase in the future due to the construction of new dams in PDR Lao and Cambodia. If all dams that are currently planned for the next two decades are built, they will induce a decline of suspended sediment flux of 50% (47–53% 90% confidence interval (90%CI)) compared to current levels (99 Mt/year at the delta apex), with potentially damaging consequences for local livelihoods and ecosystems. En ligne : https://doi.org/10.1016/j.scitotenv.2020.142468 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=255518
in Science of the Total Environment > vol. 755, Part 1 (February) . - p. 1-12[article] Impact of dams and climate change on suspended sediment flux to the Mekong delta [objet à 3 dimensions, artefacts, ...] / G. Bussi ; T. Berchoux ; C. Hutton ; C.R. Hackney ; G. Vasilopoulos ; H.E. Voepel ; S.J. Dadson ; L. Jin ; P.G. Whitehead ; S.E. Darby ; A. Nicholas ; D.R. Parsons . - 2021 . - p. 1-12.
Langues : Anglais (eng) Langues originales : Anglais (eng)
in Science of the Total Environment > vol. 755, Part 1 (February) . - p. 1-12
Catégories : C ECONOMIE - ECONOMIE SOCIALE ET SOLIDAIRE:Génie civil, militaire et minier:Technologie hydraulique:Structure hydraulique:Barrage ; F POPULATIONS - ETUDES DE CAS:Models ; S SCIENCES ET TECHNIQUES:Géographie et océanographie:Géomorphologie:Topographie:Forme terrestre:Zone côtière:Delta ; S SCIENCES ET TECHNIQUES:Pollution, catastrophes et sécurité:Dégradation de l'environnement:Changement climatique ; S SCIENCES ET TECHNIQUES:Sciences de la terre:Géodynamique:Sédimentation ; S SCIENCES ET TECHNIQUES:Sciences de la terre:Sciences du sol:Fertilité du sol Mots-clés : 07 - ENVIRONNEMENT 7.6 - Changement Climatique DAMS DELTAS WATERSHEDS BASSIN VERSANT SOIL FERTILITY CLIMATIC CHANGE MODELE SOUTH EAST ASIA ASIE DU SUD EST Résumé : The livelihoods of millions of people living in the world's deltas are deeply interconnected with the sediment dynamics of these deltas. In particular a sustainable supply of fluvial sediments from upstream is critical for ensuring the fertility of delta soils and for promoting sediment deposition that can offset rising sea levels. Yet, in many large river catchments this supply of sediment is being threatened by the planned construction of large dams. In this study, we apply the INCA hydrological and sediment model to the Mekong River catchment in South East Asia. The aim is to assess the impact of several large dams (both existing and planned) on the suspended sediment fluxes of the river. We force the INCA model with a climate model to assess the interplay of changing climate and sediment trapping caused by dam construction. The results show that historical sediment flux declines are mostly caused by dams built in PR China and that sediment trapping will increase in the future due to the construction of new dams in PDR Lao and Cambodia. If all dams that are currently planned for the next two decades are built, they will induce a decline of suspended sediment flux of 50% (47–53% 90% confidence interval (90%CI)) compared to current levels (99 Mt/year at the delta apex), with potentially damaging consequences for local livelihoods and ecosystems. En ligne : https://doi.org/10.1016/j.scitotenv.2020.142468 Permalink : https://cs.iut.univ-tours.fr/index.php?lvl=notice_display&id=255518
