海流测量数据的后处理探究  

Research on the Post-Processing of Current Velocity Data

作　　者：任少华 周冲 叶小凡 

机构地区：[1]浙江省河海测绘院,浙江杭州310008

出　　处：《海洋技术》2013年第4期63-66,共4页Ocean Technology

基　　金：国家自然科学基金资助项目(41006053);水利部公益性行业科研专项资助项目(201001072)

摘　　要：对海流分层流速数据进行分析,提出了复合指数模型和流速差法,并对这两种方法进行了适用性分析。复合指数模型有一个固定的函数形式,参数多线型灵活,对不同海流垂向流速分布规律适用性较好;流速差法没有固定的函数,根据定点测量数据寻找规律,曲线形式多变,适用于分层较多的状况。该方法的适用性与层数有关,分层较少时,对未测量区域流速的推算波动较大,失真明显。可结合ADCP,对其测量的数据进行进一步的处理,以期减少测量误差,获得更准确的海流数据。The layered current velocity data are analyzed in this paper, before proposing a complex exponential distribution model and a velocity-difference method, with the applicability analysis of the two methods conducted. The complex exponential model has a fixed functional form and five parameters, so the line has better flexibility, suitable for studying the distribution law of the vertical velocities of different currents. In contrast, the velocity-difference method doesn＇t have a fixed function. This method studies the law of currents based on the fixed-point current values, and is suitable for the situation of multiple layers. Its applicability is related to the number of layers. When current has less layers, calculation on the velocities in unmeasured area fluctuates obviously, leading to notable distortion. Combined with ADCP, measured data are further processed, in order to reduce measurement errors and obtain more accurate current data.

关 键 词：海流流速 垂向分布 复合指数模型 流速差法 声学多普勒流速剖面仪 

分 类 号：TP716.2[自动化与计算机技术—检测技术与自动化装置]