Measuring flow velocity and sediment transport with an acoustic Doppler current profiler
Measuring flow velocity and sediment transport with an acoustic Doppler current profiler
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DOI：
10.1016/j.geomorph.2004.07.012
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发表时间：
2005-05-15
期刊：
影响因子：
3.9
通讯作者：
Franklin, M
中科院分区：
文献类型：
--
作者：
Kostaschuk, R;Best, J;Franklin, M
声学多普勒电流剖面仪 (aDcp) 使用多普勒频移原理测量水柱内的三维速度剖面，而底部跟踪功能和声学反向散射可用于测量床层负载速度并估计悬浮沉积物浓度。与传统的单点海流计和沉积物采样器相比，aDcp 具有许多优势，包括从移动发射进行部署、用于速度和沉积物输送测量的单一仪器、三维速度和悬浮沉积物的剖面以及绘制整个流场的能力。 aDcps 的局限性包括靠近床层的采样直径较大、垂直速度测量粗略、底部轨迹记录不完整、对底部轨迹与沉积物迁移机制之间的关系了解甚少，以及声学反向散射对颗粒尺寸的敏感性。 (c) 2004 Elsevier B.V. 保留所有权利。
An acoustic Doppler current profiler (aDcp) measures three-dimensional velocity profiles within the water column using the Doppler shift principle, whilst the bottom tracking function and acoustic backscatter can be used to measure bed load velocity and estimate suspended sediment concentration. The aDcp offers many advantages over traditional single-point current meters and sediment samplers, including deployment from a moving launch, a single instrument for both velocity and sediment transport measurements, profiles of three-dimensional velocity and suspended sediment and the ability to map an entire flow field. Limitations of aDcps include a large sampling diameter close to the bed, coarse measurement of vertical velocity, fragmented bottom track records, a poor understanding of the relation between bottom tracking and the mechanisms of sediment transport, and sensitivity of the acoustic backscatter to particle size. (c) 2004 Elsevier B.V. All rights reserved.