摘要
This study investigates the physical conditions(water depth, current speed, salinity, temperature) in Lianzhou Bay, a shallow coastal bay in southern China, during two expeditions in the dry and wet seasons of 2011. Based on these expedition data, basic hydrodynamic parameters like Brunt-V?is?l? Frequency, Richardson Number, Rossby radius, and Resonance Period are calculated. The results show that Lianzhou Bay is characterized by comparatively small quantity of freshwater input and weak stratification. Strong tides, which are spatially uniform within the bay, cause turbulent mixing. Residence time of the water is shorter in winter due to a stronger coastal current in that season. Consideration of the water movement may help to reduce the harmful ecological impact of aquaculture waste water discharge.
This study investigates the physical conditions （water depth, current speed, salinity, temperature） in Lianzhou Bay, ashallow coastal bay in southern China, during two expeditions in the dry and wet seasons of 2011. Based on these expedition data,basic hydrodynamic parameters like Brunt-Vaisaila Frequency, Richardson Number, Rossby radius, and Resonance Period are calcu-lated. The results show that Lianzhou Bay is characterized by comparatively small quantity of freshwater input and weak stratifica-tion. Strong tides, which are spatially uniform within the bay, cause turbulent mixing. Residence time of the water is shorter in winterdue to a stronger coastal current in that season. Consideration of the water movement may help to reduce the harmful ecologicalimpact of aquaculture waste water discharge.
基金
the financial support from the German Federal Ministry for Education and Research(BMBF)to the Leibniz-Zentrum für Marine Tropenkologie GmbH(ZMT),Germany,for the project‘The Role of Mangroves for Biogeochemical Fluxes into the Coastal Ecosystemsunder the Influence of Anthropogenic Alterations’as part of the Sino-German Research Project‘BEIBU-Holocene environmental evolution and anthropogenic impact of Beibu Gulf,South China Sea’,WTZ China(Grant No.03F0607B) is acknowledged.
