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 : Managing deltas : Influence of seasonal topography change on saline intrusion in a multi-branched estuary system
Influence of seasonal topography change on saline intrusion in a multi-branched estuary system
Author : MOTOHIKO UMEYAMA(1) & NARUMI ISHIKAWA(1)
ABSTRACT
We developed a predictive flow-distribution model, considering how the energy loss by the bottom friction affects the rate
of freshwater discharge in the branched channels, and a saline intrusion model, considering the salt balance by diffusion
and advection. The study area is located in the Red River Delta, where the Red River and many distributaries spread out
to form a large alluvial plain. The Red River Estuary System lies in the southeastern part of the delta and includes four
branches: the Tra Ly, Red River, Ninh Co, and Day. The predicted result was compared with a set of observed data and
with the numerical result by commercial software. The mean freshwater discharge rate was calculated accurately at
junctions where the main flow separates into branches. Salinity distributions were estimated by making use of the salt
intrusion model. The present models efficiently evaluate the mixing mechanism caused by the tidal flux in a multibranched
estuary, where hydraulic data are not always feasible to observe in the dry season.
File Size : 1,161,657 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Managing deltas
Date Published : 19/08/2015
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