平原区河道流速分布规律及其在横向声学多普勒流量测验系统中的应用

横向声学多普勒流速仪(H-ADCP)因其测验的自动高效和信息传输的快捷在流量测验中得到广泛应用。针对现状代表流速选取存在水文物理含义不明的缺点,根据垂线流速分布理论模型,并结合实测垂线流速资料,提出了平原区不同类型河道流速分布拟合模型,并实际引用。应用结果表明：基于幂指数函数和一元多项式函数拟合的流速分布模型能够用于H-ADCP层流速到垂线流速的转化,率定的单断关系精度可靠,可为H-ADCP测流系统流速率定单断关系提供新的方法。

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Acoustic Doppler Velocimeter (H-ADCP) is widely used in flow measurement because of its automatic, efficient and fast information transmission. According to the theoretical model of vertical velocity distribution and the measured data of vertical velocity, a fitting model of flow velocity distribution in different types of rivers in plain area is proposed and applied. The application results show that the velocity distribution model based on power exponential function and univariate polynomial function can be applied to the conversion of H-ADCP laminar velocity to vertical velocity, and the accuracy of the single-break relationship is reliable, which can provide a new method for determining the point velocity and cross-section e velocit relationship of H-ADCP flow measurement system.