定点式雷达波测流优化方案研究及适用性分析

Study on Optimal Scheme of Fixed-Point Radar Current Meter and Its Applicability

以湖北省南阳河木鱼水文站和粉青河两河口水文站为研究对象,提出以雷达波表面流速处理、断面流速分布概化、流量计算模型相结合的测流优化方案,系统分析定点式雷达波测流的影响因素及优化方案的适用性。结果表明:(1)木鱼和两河口站的不确定度分别为10.95%和11.58%,满足浮标法单次流量测验允许误差三类站不确定度的要求;(2)优化方案考虑了数据预处理和流速的垂向及横向分布,可有效消除流量过程中的粗大误差和随机误差。不确定度由常规方案的28.96%和30.34%,分别降低为10.95%和11.58%。因此,该优化方案具有较好的适用性和推广应用价值,可为后续定点式雷达波在线测流研究提供新的方法和思路。

This paper took Muyu(Nanyang River)and Lianghekou(Fenqinghe River)hydrological stations in Hubei Province as a case study,and proposed an optical scheme for flow measurement based on radar wave surface velocity treatment,sectional velocity distribution generalization and flow calculation model,and systematically analyzed the influencing factors of fixed-point radar current meter and the applicability of scheme.The results show that:(1)The uncertainties of Muyu and Lianghekou stations are 10.95%and 11.58%respectively,which can meet the requirements of three types of station uncertainty for the allowable error of single flow measurement by buoy method;(2)The scheme takes into account the data pre-processing and the vertical and horizontal distribution of flow velocity,which can effectively eliminate gross errors and random errors in the flow process.The uncertainties was reduced from 28.96%and 30.34%to 10.95%and 11.58%respectively.Therefore,the optical scheme has good applicability and application value,and can provide new methods and ideas for the post research of fixed-point radar current meter.