INFLUENCE OF TIDAL INLET DEPTH ON WATER LEVEL RESPONSE AND SALINITY INTRUSION IN A LAGOON

Kazuya Watanabe; Hitoshi Tanaka

doi:10.9753/icce.v32.currents.31

No. 32 (2010), Swash, Nearshore Currents, and Long Waves

No. 32 (2010)

INFLUENCE OF TIDAL INLET DEPTH ON WATER LEVEL RESPONSE AND SALINITY INTRUSION IN A LAGOON

Swash, Nearshore Currents, and Long Waves

https://doi.org/10.9753/icce.v32.currents.31

Published 2011-01-31

Kazuya Watanabe⁺⁻
Hitoshi Tanaka

Kazuya Watanabe

Kagawa National College of Technology

Hitoshi Tanaka

Proceedings of the 32nd International Conference

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Keywords

water level variation
3D numerical simulation
spectral analysis

How to Cite

Watanabe, K., & Tanaka, H. (2011). INFLUENCE OF TIDAL INLET DEPTH ON WATER LEVEL RESPONSE AND SALINITY INTRUSION IN A LAGOON. Coastal Engineering Proceedings, 1(32), currents.31. https://doi.org/10.9753/icce.v32.currents.31

Abstract

The Nagatsura-ura Lagoon in Miyagi Prefecture, Japan is a semi-enclosed water area that has been used for aquaculture of oyster for these forty years. Recently, however, death of oysters has frequently occurred due to anoxic water near the bottom, and is a big concern among stakeholders. The Nagatsura-ura Lagoon and Oppa Bay are connected by shallow tidal inlet, and its water depth greatly affects hydrodynamics and water environment in the lagoon. In this study, time variation of water level in the lagoon in response to tidal variation is investigated through spectral analysis to quantify the role of water depth in the hydrodynamic process. Furthermore, the relationship between the inlet water depth and the salinity concentration intruding into the lagoon is examined through 3-D numerical simulation.

https://doi.org/10.9753/icce.v32.currents.31

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References

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INFLUENCE OF TIDAL INLET DEPTH ON WATER LEVEL RESPONSE AND SALINITY INTRUSION IN A LAGOON

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