IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Experimental study on the impact of salinity on the settling velocity of fine sediment in static wat...
Experimental study on the impact of salinity on the settling velocity of fine sediment in static water
Author : YANGMING OU (1), LEILEI QIN (1), ZHONGHAO LIU (1), RAN LI (1)*
ABSTRACT
Salt concentration can increase the flocculation of fine-grained sediments in suspension; many relationships
between salinity and settling velocity have been developed in the previous studies. However, these unique relationships
typically have been limited in their appalicability due to their specific conditions. Salt concentration on the impact
process of flocculation and settling for smaller particle and non-natural sand was rarely studied. In this paper, kaolinite is
the constituent mineral of the sediment sample (D10=1 m ; D50=5 m ; D90=29 m ). The experiments were
conducted in a 1.5m high settling column, for different initial concentration of sediment (0.6~17.0 g l-1) and different
NaCl concentration (0~20 g l-1). For each case, samples were collected at 8 times (0, 30, 60, 120, 180, 240, 360 and
1320minutes); settling velocities were calculated on the basis of the time evolution of suspended sediment
concentrations. Settling velocity in direct relation with the increase in NaCl concentration and sediment concentration,
after reaching the best-flocculation NaCl concentration (5.0~7.0 g l-1) and best-flocculation sediment concentration
(4.5~7.0 g l-1), the velocity will decrease before tending to stability.
File Size : 413,448 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 28/08/2015
Download Now