Numerical Investigation of Wind Driven Circulation and Horizontal Dispersion in the Surface Layer of a Re-flooded Shallow Lake
Numerical Investigation of Wind Driven Circulation and Horizontal Dispersion in the Surface Layer of a Re-flooded Shallow Lake
复制标题
重新淹没的浅湖表层风驱动环流和水平扩散的数值研究
DOI：
10.1007/s40710-016-0165-z
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
N. Mellios
中科院分区：
文献类型：
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作者：
K. Kopasakis;C. Laspidou;M. Spiliotopoulos;D. Kofinas;N. Mellios
重新淹没的湖泊具有独特的自然和文化价值，受到人为压力的威胁，是地中海淡水资源管理的一个非常重要的部分。卡拉湖位于色萨利（希腊）东部，是湖泊生态系统的一个例子，在60年代干涸，以提供更多的农业用地; 2000年在第三个社区支持框架下启动了恢复工作。本文采用三维水动力学模型研究了入流、风作用和科里奥利作用对湖泊水循环和水平扩散的影响。一些风向已被测试后，湖的流通，而除了风的其他参数，如流入和科里奥利力，已占。保守的计算示踪剂被用来评估从卡拉湖的各个位置的水平扩散率。模拟结果表明，在沿海地带，海流的方向与风向相对应。水平扩散率在湖中心区域较高，不受皮尼奥斯河入湖和科里奥利作用的影响。本文的研究将有助于确定水体中的水成物质的水平输运，这在确定其生化状态中起着重要作用。
The re-flooded lakes with unique natural and cultural values that are under threat from anthropogenic pressure, consist a very important section of fresh water resources management in the Mediterranean. Lake Karla, positioned in the eastern part of Thessaly (Greece), is an example of a lake ecosystem, which was dried in the 60s to provide additional agricultural land; its restoration was launched in 2000 under the 3rd Community Support Framework. The object of the present paper is the study of the effect of the inflows, the wind action and the Coriolis action on the water circulation and the horizontal dispersion of the lake, using a three-dimensional hydrodynamic model. A number of wind directions have been tested upon the lake’s circulation, while in addition to winds other parameters, like inflow and Coriolis force, have been accounted for. Conservative computational tracers were used to assess the rate of horizontal dispersion from various locations in Lake Karla. The simulations indicated that in the coastal strip, the direction of the current corresponded to the wind direction. The horizontal dispersion rate is higher in the central region of the lake and it is not influenced by the presence of the inflow from Pinios River and the Coriolis action. The research in this paper will be useful in determining the horizontal transport of waterborne materials in the lake body which plays a major role in determining its biochemical status.