On the internal boundary layer related wind stress curl and its role in generating shallow lake circulations

Journal of Hydrology and Hydromechanics

Józsa János¹ 

[1] Budapest University of Technology and Economics, Department of Hydraulic and Water Resources Engineering, also MTA-BME Water Management Research Group, Műegyetem rkp 3, H-1111, Budapest, Hungary;

关键词: wind-induced flow;    internal boundary layer;    wind stress curl;    shallow lakes;    lake neusiedl;   

DOI  :  10.2478/johh-2014-0004

来源: DOAJ

【 摘 要 】

The paper demonstrates that the wind stress curl as an external vorticity source plays an important role in shaping large scale shallow lake circulations. The analysis of purpose-oriented simultaneous wind and current measurements data from the Hungarian part of Lake Neusiedl reasonably fits well the internal boundary layer development theory over the lake surface. A 2-D vorticity formulation of wind-induced flows is used to demonstrate mathematically the IBL-related large scale circulation generation mechanism well reflected in the measured data. Further validation of the findings is carried out by means of simple 2-D numerical flow modelling, in which details on the flow pattern besides the measurement sites could be also revealed. Wind-induced lake circulations linked to IBL development shows a novelty to be implemented in up-to-date numerical flow models.

【 授权许可】

Unknown