Thi N.M.L. auteur aut IRD Garnier J. auteur aut IRD Billen G. auteur aut IRD Thi P.Q.L. auteur aut IRD Nemery Julien auteur aut IRD Orange Didier auteur aut IRD Lan A.L. auteur aut IRD text journalArticle eng text/pdf born digital access The Red River Delta (RRD) (Vietnam), a region experiencing rapid population growth, industrialization, and economic development, concentrates 54% of the population of the whole Red River watershed in less than 10% of the basin area. Our study aimed at understanding and quantifying the processes by which the delta affects the nutrient fluxes coming from the upstream watershed before they reach the sea. A comprehensive budget of nitrogen (N), phosphorus (P), and silica (Si) fluxes associated with natural and anthropogenic processes in the terrestrial and hydrological system of the delta was established for five sub-basins of the delta for the period 2000-2006, based on official statistical data, available measurements, and our own sampling campaigns and enquiries. The results show that anthropogenic inputs of N and P brought into the delta area are higher than the amounts delivered by the river from the upstream watershed. However, the amounts of these two elements ultimately delivered to the coastal zone from the delta are lower than the amounts carried by the upstream river, showing extremely efficient retention of both the soils and the delta's drainage network. For Si (taking into account both dissolved and amorphous solid forms), the retention is much lower. High retention of N and P and low retention of Si in the delta area have up to now protected the coastal zone from severe eutrophication problems. specialized Red river Delta Nutrient budget Nitrogen Phosphorus Silica Marine eutrophication ICEP indicator VIETNAM 064 062 107 1-3 241-259 2012 0168-2563 https://www.documentation.ird.fr/hor/fdi:010054352 10.1007/s10533-010-9549-8 0168-2563 [F B010054352] https://www.documentation.ird.fr/hor/fdi:010054352 https://www.documentation.ird.fr/intranet/publi/2012/02/010054352.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2012-03-07 2017-08-23 fdi:010054352 fre