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.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Filed measurement of suspended sediment distribution in a large river
Filed measurement of suspended sediment distribution in a large river
Determining the flux of flow and sediments transported through the system is essential to understand the dynamics of
the basin. Especially, it is necessary to obtain the information on the geomorphological characteristics of channel and
the mechanism of sediment transport in order to establishing the proper measures for river management after abrupt
changes of river environment. This paper presents the result of field measurement over a specific reach in the Nakdong
River for the distribution of suspended sediment and flow characteristics using LISST (Laser In-Situ Scattering and
Transmissometry, LISST-100X from Sequoia) and ADCP (M9 from SonTek), respectively. For 6 sections over 10 km
downstream of Gangjeong-Goryong weir and the confluence of Geumho River, transversal and vertical distributions of
volumetric concentration of suspended sediment(<250 m) and velocity profiles have been measured. Discharge from the
upper reach ranged from 1,500~2,500 m3/s. A boat, installing LISST fitted with a winch and ADCP, has been used with
DGPS for location information. From the result, it can be observed that the velocity profiles over the depth have strong
correlation with vertical distributions of suspended sediment. And the volumetric concentration distributions according to
particle size also show the variability depending on the vertical and transversal velocity structures and geometric
features of channel
File Size : 1,163,828 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
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