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| Charmasson, S. |
| The low tidal range of the Mediterranean Sea and the high sediment load of the Rhone induce the formation of an important submarine delta. The Cs-137 inventory in sediment on a 480 km(2) area near the Rhone mouth reached 19.6 TBq in 1990. The spatial distribution of both sediment accumulation rates and (CS)-C-137 concentrations in this area confirm the existence of a spatially well-delimited zone, i.e. the prodelta, where both parameters are the highest. Thus, 40% of the total amount of Cs-137 stored in this 480 km(2) area was found within the prodelta (30 km(2)) in the close vicinity of the river mouth. This attests to the efficiency of the (CS)-C-137 trapping by the prodelta sediments. A study on the part the different (CS)-C-137 sources in the... |
| Tipo: Text |
Palavras-chave: Rhône; Méditerranée; Radioéléments; Sédiment; Inventaire; Rhone; Mediterranean Sea; Radionuclides; Sediment; Inventory. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43266/42997.pdf |
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| Calmet, D; Charmasson, S; Blanc, F. |
| A chronological analysis of the disturbances caused to a pelagical ecosystem by domestic and industrial outfalls discharged on the surface of the coastal waters is done. Chronological series of various sampled parameters give evidence two fundamental components, a daily one (the trend) and the other one characterized by a periodicity of about 6 h, both linked to the different phases of human activities. Cross spectral analysis applied to salinity and phytoplankton series has pointed out a 50 min delay in the answer of phytoplankton communities to the periodical salinity variations. The use of the spectral principal components analysis allowed a description of the "hydrological" structure of the studied pelagical environment associated with 3 different... |
| Tipo: Text |
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| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/00247/35798/34311.pdf |
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