流速分布规律在横向声学多普勒流量测验系统中的应用

横向声学多普勒剖面流速仪(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，结合实测垂线流速资料，提出平原区不同类型河道指数、一元多项式流速分布模型，并实际应用于百渎口站 H-ADCP 测验系统的单断关系率定。应用结果表明：基于指数流速的分布模型能够用于 H-ADCP 层流速到垂线流速的转化，率定的单断关系精度可靠，为 H-ADCP 测流系统流速率定单断关系提供新的方法。

Application of laws of velocity distribution in transverse acoustic Doppler flow measurement system

Horizontal-Acoustic Doppler Current Profiler (H-ADCP) is widely used in flow measurement because of its automatic efficient measurement and fast information transmission. With regard to disadvantages of unclear hydrological and physical meanings of current representative velocity selection, a fitting model of flow velocity distribution in different types of rivers in plain area is proposed and applied , based on the theoretical model of vertical velocity distribution and the measured data of vertical velocity. The model is used in relationship calibration between point velocity and cross-section velocity of H-ADCP measuring system in Baidukou Station. Application results show that 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 velocity relationship of H-ADCP flow measurement system.