UNIGE document Scientific Article
previous document  unige:36030  next document
add to browser collection
Title

Particle size characteristics of suspended and bed sediments in the Rhône River

Authors
McCarthy, Linda
Larbaigt, Gérard
Rossel, Daniel
Tarradellas, Jean
show hidden authors show all authors [1 - 9]
Published in Hydrological Processes. 1992, vol. 6, p. 227-240
Abstract Ten large volume water samples were taken from the Rhone River (Switzerland- France) in November 1989 for recovery of total suspended sediment by continuous flow centrifugation. The samples were freeze-dried and analysed for particle size, organic carbon, total nitrogen, and carbonate. For comparative purposes, four bed sediments collected in July 1989 are also described. The Rhone can be subdivided into three sections on the basis of the origins of the water. The first section is the Upper Rhone River draining into Lake Geneva. Waters are derived from glaciers, with low temperature and conductivity and high turbidity. Suspended sediment is coarse, has a bimodal distribution, and is low in both organic matter and carbonate. The second reach is from Lake Geneva to the confluence with the Saone at Lyon and has warmer water with higher conductivity and very low turbidity. Suspended sediment is higher in organic matter, with high carbonate originating from the lake. The final section is from Lyon to Aries, with warmer water and higher conductivity and turbidity due to modification by the Saone. Sediment is rich in organic matter, which may account for an observed decline in oxygen in the river waters downstream from Lyon. Carbonate in these sediments also decreases due to increased turbidity from the Saone. Suspended sediments other than from the Upper Rhone show a remarkable consistency in grain size, predominantly in the fine silts (mode 9-11 Jim). This consistency indicates a high degree of suitability for geochemical analysis. Bed sediments were bimodal throughout, with a dominant coarse population in two out of the four samples. Grain size statistical parameters could be easily explained by application of the theory of mixing of two major populations in the sand size (bed traction load) and the fine silt/clay size (suspended sediment load).
Keywords SedimentsRhone RiverParticle size
Full text
Article (Published version) (917 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Structures
Citation
(ISO format)
SANTIAGO, Sergio et al. Particle size characteristics of suspended and bed sediments in the Rhône River. In: Hydrological Processes, 1992, vol. 6, p. 227-240. https://archive-ouverte.unige.ch/unige:36030

136 hits

2 downloads

Update

Deposited on : 2014-04-28

Export document
Format :
Citation style :