回水影响下H-ADCP在线流量监测系统的应用分析

Application analysis of H-ADCP online flow monitoring system under the influence of backwater

水文测站受回水影响,水位-流量关系复杂,采用连实测流量过程线方法推求流量,存在工作成本较大且无法掌握流量实时变化过程的问题。本文以坝上水文站为例,使用H-ADCP进行流量实时在线监测,率定H-ADCP流速关系并进行流量及整编成果分析,发现H-ADCP在线流量监测系统在受回水影响的监测站点应用情况较好,但应用时需注意数据监测、断面更新及负流速时流量数据处理等问题。

Hydrological stations are affected by backwater,and the relationship between water level and discharge is complex.Using the method of connecting measured discharge hydrograph to calculate discharge has the problems of high working cost and inability to grasp the real-time change process of discharge.Taking Bashang Hydrological Station as an example,this paper introduces the use of H-ADCP for real-time on-line flow monitoring,calibration of H-ADCP velocity relationship,and analysis of flow and integration results.It is found that the application of H-ADCP on-line flow monitoring system in monitoring stations affected by backwater is better,but attention should be paid to data monitoring,section updating and flow data processing under negative velocity.