Flow and Sediment Movement Characteristics on the Varisized Plain of Compound Channel

Zuwen Ji, Dangwei Wang, Qing Lu, Anjun Deng

2021

Abstract

In this paper, river reaches are generalized into two types: the straight and lotus-root-shape compound channels according to plane characters of the Lower Yellow River and the Songhuajiang River. It can be seen from some experimental data of flow and sediment in two kinds of channels. The difference arises from the fact that the momentum transfer is stronger in the louts-root-shape channel than in the straight channel. Thus, the relative velocity of plain to channel type, still increases with increment of the relative depth, their differences are large at the lower relative depth, but close at the higher one. The distributions of flow velocities in two channels are similar with water depth, and the mean velocities are on the decline from main channel to flood plain. At two sides of floodplain, the change ranges from maximal to minimal velocities. Transverse velocity gradient in the interface area is bigger in the straight channel than in the lotus-root-shape channel. This is largely because, relative sediment concentration in both compound channels go up with the increase of the relative velocity and depth. The relationship of sediment concentration to depth, is such that, the enlarging speed is more rapid in the straight channel than in the lotus-root-shape channel. The transverse variation of the vertical average sediment concentration is smaller in the lotus-root-shape channel than in the straight channel, and are bigger on the plain than in the channel.

Paper Citation

in Harvard Style

Ji Z., Wang D., Lu Q. and Deng A. (2021). Flow and Sediment Movement Characteristics on the Varisized Plain of Compound Channel. In Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE, ISBN 978-989-758-560-9, pages 171-178

in Bibtex Style

@conference{wre21,
author={Zuwen Ji and Dangwei Wang and Qing Lu and Anjun Deng},
title={Flow and Sediment Movement Characteristics on the Varisized Plain of Compound Channel},
booktitle={Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE,},
year={2021},
pages={171-178},
publisher={SciTePress},
organization={INSTICC},
doi={},
isbn={978-989-758-560-9},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 7th International Conference on Water Resource and Environment - Volume 1: WRE,
TI - Flow and Sediment Movement Characteristics on the Varisized Plain of Compound Channel
SN - 978-989-758-560-9
AU - Ji Z.
AU - Wang D.
AU - Lu Q.
AU - Deng A.
PY - 2021
SP - 171
EP - 178
DO -