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P. Chauvelon (1996)
Hydrologie quantitative d'une zone humide méditerranéenne aménagée : le bassin de Fumemorte en Grande Camargue, delta du Rhône
C. Groot (1992)
Flux et transformations du phosphate et de l'azote dans les zone humides : la Camargue (delta du Rhône)
T. Moutin, P. Raimbault, H. Golterman, B. Coste (1998)
The input of nutrients by the Rhône river into the Mediterranean Sea: recent observations and comparison with earlier dataHydrobiologia, 373-374
P. Heurteaux (1992)
Modifications du régime hydrique et salin des étangs du système de Vaccarès (Camargue, France) liées aux pertubations anthropiques des cinquantes dernières annéesAnnals Limnol., 28
H. Golterman, P. Bruijn, J. Schouffoer, E. Dumoulin (1998)
Urea fertilization and the N-cycle of rice-fields in the Camargue (S. France)Hydrobiologia, 384
H. Golterman (1995)
The labyrinth of nutrient cycles and buffers in wetlands: results based on research in the Camargue (southern France)Hydrobiologia, 315
H. Golterman (1997)
The distribution of phosphate over iron-bound and calcium-bound phosphate in stratified sedimentsHydrobiologia, 364
P. Chauvelon (1998)
A wetland managed for agriculture as an interface between the Rhône river and the Vaccarès lagoon (Camargue, France): transfers of water and nutrientsHydrobiologia, 373-374
H. El Habr (1987)
Les Elements nutritifs du Rhône; Leur Devenir dans les Canaux d'Irrigation et les Marais de Camargue
C. Groot, H. Golterman (1999)
Le risque d'eutrophisation de l'Etang de Vaccarès et des marais de la Camargue (Delta du Rhône, France), 30
(1994)
Integrated water management in an irrigationbasin comprising wetlands and crops in the Camargue (South France)
H. Golterman (1995)
Remarks on numerical and analytical methods to calculate diffusion in water/sediment systemsHydrobiologia, 315
(1987)
Les Elements nutritifs du Rhône
(1990)
Impact de la Riziculture sur l’Hydrologie et la Qualité des Eaux en Camargue
P. Heurteaux (1992)
Modifications du régime hydrique et salin des étangs du système de Vaccarès (Camargue, France) liées aux perturbations anthropiques des cinquante dernières annéesAnnales De Limnologie-international Journal of Limnology, 28
L. Godin (1990)
Impact de l'irrigation pour la riziculture sur l'hydrologie et la qualité des eaux de Camargue : approche à partir du bassin d'irrigation de l'Aube de Bouic
The flux of phosphate in the aquatic ecosystems of the Camargue was modelled. The model developed for the hydrological unit, the water basin of the Aube de Bouic, is based on the hydrology of the system, the reaction equations of the adsorption of phosphate onto Fe(OOH) and the solubility product of apatite. The water basin consists of an inlet canal, the Aube de Bouic, ricefields and natural marshes, plus a drainage canal through which the excess water is pumped into the Etang de Vaccarès. Phosphate is introduced into ricefields either with the irrigation water, taken from the Rhône, or as fertiliser. Most of the phosphate will be fixed on the ricefield soils either as iron-bound or as calcium-bound phosphate, depending on the pH. The o-phosphate concentration will slowly increase to an extent depending on the pH. From the ricefields water will flow towards the Etang de Vaccarès; the amount of phosphate reaching the Etang de Vaccarès depends on the pH of the system and the depth of the water outlet of the ricefields. In six different scenarios the amount of phosphate reaching the Etang de Vaccarès is calculated depending on the quantity of fertiliser, the depth of the water outlet and the pH. For the Etang de Vaccarès the model predicts the present concentration of o-P relatively well and shows that the loading is considerable. This should cause concern; the danger of serious eutrophication is real. Part of the irrigation water is used to refill or keep under water the natural marshes in this hydrological unit, which without irrigation would dry out during summer. Again high P-concentrations are found in the marshes, but mostly in the form of Fe(OOH)≈P or CaCO3≈P, the ratio of which depends again on the pH of the sediments. The o-P concentration has remained low up to now.
Hydrobiologia – Springer Journals
Published: Sep 30, 2004
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