感潮狭水路水深がラグーン内水位応答および流入塩分に及ぼす影響 Influence of Tidal Inlet Depth on Water Level Response and Salinity Intrusion in A Lagoon
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Nagatsura-ura Lagoon in Miyagi 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. Nagatsura-ura Lagoon and Oppa Bay are connected by shallow tidal inlet, and its water depth may greatly affect hydrodynamics and water environment in the lagoon. In this study, time variation of water level in the lagoon in response to tide is investigated through spectral analysis to quantify the role of water depth in the hydrodynamic process. Furthermore, the relationship between channel water depth and salinity concentration intruding into the lagoon is examined through 3-D numerical simulation.
- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 65(1), 416-420, 2009
Japan Society of Civil Engineers