Application of shallow-water acoustic tomography to measure flow direction and river discharge
Application of shallow-water acoustic tomography to measure flow direction and river discharge
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DOI：
10.1016/j.flowmeasinst.2016.08.010
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发表时间：
2016-10-01
影响因子：
2.2
通讯作者：
Kagami, Junya
中科院分区：
文献类型：
--
作者：
Bahreinimotlagh, Masoud;Kawanisi, Kiyosi;Kagami, Junya
高频河流声波层析成像系统(FATS)最初用于测量山区河流的流速和流量。结果表明，高频FAT不仅提高了速度分辨率，而且与以前的FAT相比，最小作用距离从76m减小到43m。声波传播(射线追踪)分析表明，浅水河流中的海底地形可能是造成声波多条射线路径的原因。在连续性方程的基础上，引入了一个新的公式来估计流动方向与脂肪传输线夹角的变化。使用两条53 kHz和30 khz的交叉脂肪传输线测量血流方向。结果与部署在两条线交点附近的俯视ADCP(声学多普勒水流剖面仪)进行了比较，后者测量了水流方向的变化。实验结果证实了该方法的有效性。最后，用两种FAT系统估算了河流流量，并与额定曲线法和移动船只ADCP估计值进行了比较。脂肪排泄量测量的相对误差小于10%。(C)爱思唯尔有限公司出版的2016年。
High-frequency Fluvial Acoustic Tomography System (FATS) was initially used to measure flow velocity and river discharge in a mountainous river. The results showed the high-frequency FATS, not only improves the velocity resolution, but also reduces the minimum operational range from 76 m to 43 m in compare with the previous type of FATS. The analysis of sound wave propagation (Ray tracing) showed the bottom topography can be the reason of multi-ray paths of sound wave in the shallow freshwater rivers. A new formula based on the continuity equation introduced to estimate the variations of the angle between the flow direction and the FATS transmission line. The flow direction was measured using two crossed FATS transmission lines of 53 kHz and 30 kHz. The results compared to the up-looking ADCP (Acoustic Doppler Current Profiler) deployed near the intersection of the two lines which measured the changes in flow direction. The results affirmed the efficiency of the proposed method. Finally, the river discharge was estimated by both FAT systems and compared to the Rating Curve method and moving boat ADCP estimates. The relative error of the FATS discharge measurements was less than 10%. (C) 2016 Published by Elsevier Ltd.