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 : Hydro-environment : Nano-particle transport processes with density between stream and subsurface
Nano-particle transport processes with density between stream and subsurface
Author : Qihao Jiang (1,2), Guangqiu Jin (1,2)*, Hongwu Tang (1,2)
EXTENDED ABSTRACT
The nano-particle has its unique characteristics, such as small size between 1-100nm and large specific surface area
which could be more easily to adsorb with contaminants, that can accelerate the fate of contaminant transport in the
hyporheic zone. However, how the nano-particle transport effected with density in the hyporheic would not clearly.
therefore, this transport process is very important to has the fluvial systems.
In this paper we demonstrated the nano-particle transport processes in the hyporheic zone with experiments and
simulations, which compare no density, different density solute and nano-particle transport in the hyporheic zone. these
could show the characteristic of the nano-particle transport with density between stream and streambed.
The exchange of nano-particle between stream and subsurface has become very important for the stream ecosystem
recovery. We illustrated nano-particle transport characteristics through experiments and numerical simulations. the carbon
ink was used as a kind of nano-particle which can ingeniously reveal the nano-particle transport characteristics in the
hyporheic zone. a three-dimensional flow and mass transport model with density was used to explore how nano-particle
transported in the hyporheic zone. the small density gradient of nano-particle could transport into pore water and most of
carbon ink finally released into the river, but the large density gradient of nano-particle will settling on the bottom of
streambed. Meanwhile some part of the nano-particle transport in the hyporheic zone would be filtrated in the streambed
and a small amount of nanoparticles would be remnant in the hyporheic zone. the results showed that the nanoparticle
transport in the hyporheic zone was mainly effected by pore water, settling and filtration.
File Size : 597,834 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 28/08/2015
Download Now