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The role of atmospheric forcing in d...
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Baek, Seungjin.
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The role of atmospheric forcing in determining transport in a shallow tidal lagoon.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
The role of atmospheric forcing in determining transport in a shallow tidal lagoon./
作者:
Baek, Seungjin.
面頁冊數:
117 p.
附註:
Source: Dissertation Abstracts International, Volume: 67-08, Section: B, page: 4626.
Contained By:
Dissertation Abstracts International67-08B.
標題:
Engineering, Marine and Ocean. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3228261
ISBN:
9780542822209
The role of atmospheric forcing in determining transport in a shallow tidal lagoon.
Baek, Seungjin.
The role of atmospheric forcing in determining transport in a shallow tidal lagoon.
- 117 p.
Source: Dissertation Abstracts International, Volume: 67-08, Section: B, page: 4626.
Thesis (Ph.D.)--University of California, Berkeley, 2006.
The role of atmospheric forcing in a tidal lagoon is studied using a three-dimensional hydrodynamic model. The goals of the study are to implement the temperature transport scheme in the model and to evaluate the relative importance of tidal forcing, wind forcing and heat exchange with the atmosphere in the dynamics of the lagoon.
ISBN: 9780542822209Subjects--Topical Terms:
1019064
Engineering, Marine and Ocean.
The role of atmospheric forcing in determining transport in a shallow tidal lagoon.
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Thesis (Ph.D.)--University of California, Berkeley, 2006.
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The role of atmospheric forcing in a tidal lagoon is studied using a three-dimensional hydrodynamic model. The goals of the study are to implement the temperature transport scheme in the model and to evaluate the relative importance of tidal forcing, wind forcing and heat exchange with the atmosphere in the dynamics of the lagoon.
520
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A temperature transport scheme is developed and implemented into an existing three-dimensional hydrodynamic model, which evaluates the air-water heat exchanges and computes the vertical temperature profile. The model is applied to Mildred Island, a tidal lake located in Sacramento-San Joaquin Delta in California. The turbulence exchange coefficient is a major calibration parameter that controls the heat loss due to evaporation. The stratification induced by the temperature of the water column predicted by the model matches relatively well with the field measurements.
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The importance of atmospheric forcing in the hydrodynamic model is investigated using flushing time analysis. The numerical domain is initialized with a passive scalar at a uniform concentration. As the model transports the scalar from its initial stage, the temporal variability of scalar concentration is used to calculate the flushing time with an analogy to a simple reactor model. It is shown that the atmospheric forcing has significant influence on the dynamics of Mildred Island especially on the southeastern corner. With the inclusion of atmospheric forcing, flushing time of Mildred Island significantly decreases which indicates that transports within the island and between the island and the adjoining channel are notably enhanced by the atmospheric forcing.
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The relative importance of mixing mechanisms is evaluated by applying artificial combinations of mixing mechanisms to Mildred Island. It is verified that the inclusion of heating and cooling to the model consistently decrease the flushing time of Mildred Island.
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Based on the results from the process studies and flushing time evaluation with variable mixing mechanisms, we propose a generalized guideline to classify dominant mixing mechanisms in a part of or the whole water body where mixing mechanisms are expected to have a spatial variability.
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