江河湖泊等自然紊动水体流速数据对水环境和生态研究具有重要意义,针对当前ADCP使用的现状,开展了基于船载式浮动平台的ADCP垂线流速分布测验研究。基于不同水流条件下的现场测验数据,分析了浮动平台上获取数据的可靠性,并对比了脉冲相干和非相干2种测量方式获取的垂线流速分布数据。结果表明,在船载式浮动平台上应用ADCP测验垂线流速分布是可行的。在浅水区,脉冲相干测量方式的精度和垂线的分辨率都较非相干测量方式有显著提高,应尽可能采用脉冲相干测量方式。测验研究结果可供这类浮动平台上ADCP流速测验提供借鉴。
Abstract
The velocity data of natural turbulence flow in rivers and lakes is significant to water environment and ecology research. We carried out research on the vertical velocity distribution test using ADCP (Acoustic Doppler Current Profiler) on ship-borne floating platform. According to field measurement data under different flow conditions, we analysed the reliability of ADCP data received on ship-borne floating platform, and compared the vertical velocity distribution data under pulse coherent measurement mode and pulse incoherent measurement mode. The result indicates that vertical velocity distribution measurement using ADCP on ship-borne floating platform is feasible. In shallow water, the pulse coherent mode is recommended because it can notably improve measurement accuracy and resolution.
关键词
多普勒声学流速剖面仪 /
流速 /
垂线分布 /
相干 /
非相干
Key words
ADCP /
flow velocity /
vertical distribution /
coherent /
incoherent
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基金
国家自然科学基金(41071021);国家重点基础研究发展计划资助项目(2012CB417000)
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