【摘 要】
：
本文应用ECOM模式,设计理想河口数值试验,研究盐度锋面强弱、底形、径流量变化对河口环流的影响。在仅河口中央盐度锋面的驱动下,因斜压作用与正压作用形成纵向环流,因科氏力
【机 构】
：
上海市水利工程设计研究院有限公司,华东师范大学河口海岸学国家重点实验室,
论文部分内容阅读
本文应用ECOM模式,设计理想河口数值试验,研究盐度锋面强弱、底形、径流量变化对河口环流的影响。在仅河口中央盐度锋面的驱动下,因斜压作用与正压作用形成纵向环流,因科氏力作用形成横向环流。纵向环流因盐度锋面的减弱(加强)而减弱(加强),而横向环流则因科氏力与斜压作用此消彼长而略呈反向变化。倾斜地形加剧了纵向环流作用,产生明显的上升流和下降流。径流量的大小对纵向环流的影响较大,而对横向环流影响较小。
In this paper, ECOM model is used to design ideal numerical experiment of estuary to study the influence of salinity front strength, bottom shape and runoff on estuarine circulation. Driven only by the salinity front of the central mouth of the estuary, a longitudinal circulation occurs due to baroclinic action and positive pressure, and a transverse circulation occurs due to Coriolis force. Longitudinal circulation weakens (strengthens) due to the weakening (strengthening) of the salinity front, while the lateral circulation changes slightly in reverse due to the reversal of Coriolis force and baroclinism. Tilt terrain exacerbated the role of longitudinal circulation, resulting in a clear upward flow and descending flow. The size of the runoff has a greater impact on the longitudinal circulation but less on the lateral circulation.
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