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The role of wind-waves and currents ...

Jones, Nicole Louise.

The role of wind-waves and currents on vertical mixing in shallow water bodies: Implications for phytoplankton distribution.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The role of wind-waves and currents on vertical mixing in shallow water bodies: Implications for phytoplankton distribution.
作者:	Jones, Nicole Louise.
面頁冊數:	209 p.
附註:	Advisers: Stephen Monismith; Janet Thompson.
附註:	Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1212.
Contained By:	Dissertation Abstracts International68-02B.
標題:	Engineering, Environmental.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3253498

The role of wind-waves and currents on vertical mixing in shallow water bodies: Implications for phytoplankton distribution.
Jones, Nicole Louise.

The role of wind-waves and currents on vertical mixing in shallow water bodies: Implications for phytoplankton distribution. - 209 p.

Advisers: Stephen Monismith; Janet Thompson.

Thesis (Ph.D.)--Stanford University, 2007.

Measurements of the vertical distribution of the dissipation of turbulent kinetic energy were made in the shallow embayment of Grizzly Bay, San Francisco Bay. Under conditions of whitecapping waves, dissipation of turbulent kinetic energy in the upper portion of the water column was greatly enhanced, relative to the predictions of wind stress wall-layer theory. The ability of one dimensional hydrodynamic models to reproduce the dissipation and velocity profiles was tested. The k-omega turbulence model was found to best replicate the field measurements. A one dimensional phytoplankton model was used to investigate the influence of whitecapping waves on phytoplankton dynamics in a shallow water column. In a very turbid water column the critical benthic grazing rate for bloom initiation is low and does not vary with the additional source of turbulent kinetic energy due to wave breaking. For a less turbid water column the critical benthic grazing rate for bloom initiation is significantly lower with wave breaking compared with the bed stress source of mixing alone. Finally, field experiments were undertaken to measure the influence of hydrodynamics on the removal of phytoplankton by benthic grazers in Suisun Slough, North San Francisco Bay. The benthic grazing rate was determined to be positively correlated to the bed shear stress.Subjects--Topical Terms:

212478
Engineering, Environmental.

The role of wind-waves and currents on vertical mixing in shallow water bodies: Implications for phytoplankton distribution.
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502 $a Thesis (Ph.D.)--Stanford University, 2007.
520 # $a Measurements of the vertical distribution of the dissipation of turbulent kinetic energy were made in the shallow embayment of Grizzly Bay, San Francisco Bay. Under conditions of whitecapping waves, dissipation of turbulent kinetic energy in the upper portion of the water column was greatly enhanced, relative to the predictions of wind stress wall-layer theory. The ability of one dimensional hydrodynamic models to reproduce the dissipation and velocity profiles was tested. The k-omega turbulence model was found to best replicate the field measurements. A one dimensional phytoplankton model was used to investigate the influence of whitecapping waves on phytoplankton dynamics in a shallow water column. In a very turbid water column the critical benthic grazing rate for bloom initiation is low and does not vary with the additional source of turbulent kinetic energy due to wave breaking. For a less turbid water column the critical benthic grazing rate for bloom initiation is significantly lower with wave breaking compared with the bed stress source of mixing alone. Finally, field experiments were undertaken to measure the influence of hydrodynamics on the removal of phytoplankton by benthic grazers in Suisun Slough, North San Francisco Bay. The benthic grazing rate was determined to be positively correlated to the bed shear stress.
520 # $a Shallow water habitat is recognised as central to the ecological health of estuarine systems. However, data on the structure of flows, mixing, light variability and benthic grazing in shallow waters are extremely limited. A series of field and numerical studies were undertaken to investigate the role of both wind-waves and currents in determining vertical mixing in shallow water and examine the resulting implications for phytoplankton dynamics.
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