水科学进展2012，Vol.23Issue(6)：837-843,7.
北方浅水湖泊冬季结冰对风生流的影响
Study on wind-driven flow under the influence of water freezing in winter in a northern shallow lake
摘要
Abstract
Six empirical formulae of the wind drag coefficient were considered in a MIKE21 hydrodynamic model to study properties of wind-driven flow in a shallow lake in the northern city ( Dongchang Lake in Liaocheng, Shang-dong, China) under a real wind condition. Moreover, the influence of ice cover area on simulated result was also analysed. The results showed that the accuracy was improved about 20% when the wind drag coefficient was varied with real wind field than when it was constant. That is, the model with real wind could accurately describe the wind-driven flow process of the Dongchang Lake. Among the six formulae of the wind drag coefficient, the one proposed under breeze condition was best. Freezing water has significant effected on numerical simulation of wind-driven flow, especially in the zone of ice cover. The influence of wind stress on water flow has been weakened or counteracted under water freezing. Compared with the traditional wind-driven flow simulation, it was necessary to consider ice condition or to adjust the wind drag coefficient in MIKE21 in a northern shallow lake. The results might give a reference for the water resources management in a northern shallow lake.关键词
风生流/真实风场/风应力拖曳系数/MIKE21/冰盖/东昌湖Key words
wind-driven flow/ real wind field/ wind drag coefficient/ MIKE21 / ice cover/ Dongchang Lake分类
建筑与水利引用本文复制引用
陈友媛,胡广鑫,杨世迎,李亚平..北方浅水湖泊冬季结冰对风生流的影响[J].水科学进展,2012,23(6):837-843,7.基金项目
国家水体污染控制与治理科技重大专项(2008ZX07106-003) （2008ZX07106-003）
