M9定点测流在低流速紊流严重河道的应用

Application of M9 anchored-position current observation on river with low flow velocity and serious turbulence

由于受到水利工程的影响,越来越多的水文站点的测流断面位于库区内,断面流速低且容易出现紊流情况,常规的机械流速仪无法在极低流速和紊流严重的情况下进行测验。而紊流和脉动也影响走航式ADCP的运用。为了解决这种情况下的流量测验问题,在广东省揭西县榕江南河干流东桥园站检验M9声学多普勒水流剖面仪在低流速紊流严重河道的测流情况,试验证明,M9定点测流可以满足极低流速和紊流严重的河段的流量测验。

Due to construction of hydraulic projects, the flow gauging sections of more and more hydrological sta- tions are within the reservoir area. The flow velocity is low and turbulence is frequently seen at the current gauging section, which makes measurement become impossible with conventional mechanical velocity meter.Turbulence and pulsation also affects the application of underway ADCP. In order to settle this problem, flow measurement test with M9 ADCP was conducted at Dongqiaoyuan Hydrological Station on the Nanhe mainstream of Rongjiang River within Jiexi County of Guangdong province. The results of test demonstrate that M9 anchored-position current ob- servation is able to be used at river section with extremely low velocity and serious turbulence.