Numerical Study on Effect of Topography, Shape, and Multi-branch on Saltwater Intrusion in a Conceptual Estuary

DOI Web Site Web Site 2 Citations 7 References

Search this article

Description

<p> In order to discuss the variation of saltwater intrusion and mixing types in terms of estuarine bed topography, planform shape, channel cross-section and multi-branch, a total of 25 numerical experiments were carried out with a conceptual estuary using a three-dimensional hydrodynamic simulator. The wavy bottom of the channel had less salinity intrusion length (SIL) compared with the flat bottom (reference case) under the constant tidal range and freshwater discharge. This is because of the decrease in velocity of the gravitational flow due to the bottom drag force as well as the trapping of saltwater in the bottom hollows. The SIL was increased in the case of funnel shaped estuary compared with the straight (constant width) channel. For the channel cross-section, the temporal variation of SIL was highest in the case of the triangular cross-section and the mixing condition was changed from partially mixed to stratified with the change in cross-sectional shape from triangular to parabolic and then to the rectangular cross-section. The results from the multi-branch indicated that the sub-channels with different length would affect the saltwater intrusion and mixing condition in the estuary. It was shown from the present numerical experiments that the saltwater distribution in the estuary was significantly affected by the planform shape, bed topography and channel cross-section.</p>

Journal

Citations (2)*help

See more

References(7)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top