一种基于能量形式的风场数据统计方法及其在渤海湾水交换方面的应用  

A statistical method of wind field based on the form of energy and its application in Bohai Bay water exchange

作　　者：郑东升[1] 孙健[1,2,3] 陶建华[1] 

机构地区：[1]天津大学机械工程学院力学系,天津300072 [2]清华大学水沙科学与水利水电工程国家重点实验室 [3]水利水电工程系,北京100084

出　　处：《海洋环境科学》2013年第2期280-283,共4页Marine Environmental Science

基　　金：国家科技支撑计划项目(2010BAC68B04);国家自然科学基金(11002099);水沙科学与水利水电工程国家重点实验室开放研究基金资助课题(2013-ky-1)

摘　　要：初步探索风场对水交换的影响,设计典型算例,开展了数值模拟,分析了风速、风向和周期等风场特征参数对水交换的影响。模拟结果表明:在现实可能风场范围内,风向决定风场对水交换是否有影响;风速决定影响程度的大小;周期对水交换的影响较小。为了有效利用风场实测资料,探讨风场的时空变化对水交换的影响,以及应对实际应用中可能缺少风场资料的情况,以渤海湾的实测数据为基础,利用上述结论研究了风场数据的处理方法。在不同的时间尺度上对风场数据进行了平均化处理,并以平均后的结果为代表风参数,模拟了渤海湾的水交换。结果表明月能量平均风场和季度能量平均风场的水交换模拟结果与真实风场的水交换模拟结果非常接近。The influence of wind field on the water exchange was explored preliminarily.Some typical cases were set up,and using numerical methods the different influence of wind parameters on the water exchange were analyzed.The simulative results showed that the wind direction was the key factor that decide whether the water exchange would be affected by the wind;the wind speed was related to the speed of water exchange;and the period has a little effect on the water exchange to some degree.By using the conclusion a new method of wind field data processing was got in order to use the wind data efficiently,study the influence that the change of wind made on the water exchange and deal with the situation that the wind data may be lost.The wind data was homogenized at different time scales,and then the data was used to simulate the water exchange in the Bohai bay.The final results showed that the process of water exchange by using the month energy wind and the season energy wind separately was very close to the process by using the real wind.

关 键 词：水交换 风场 数值模拟 渤海湾 

分 类 号：P731.26[天文地球—海洋科学]