Novel high-frequency acoustic monitoring of streamflow-turbidity dynamics in a gravel-bed river during artificial dam flush
Novel high-frequency acoustic monitoring of streamflow-turbidity dynamics in a gravel-bed river during artificial dam flush
复制标题
人工冲坝期间砾石河道中水流-浊度动态的新型高频声学监测
DOI：
10.1016/j.catena.2018.09.033
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发表时间：
2018
期刊：
影响因子：
6.2
通讯作者：
Kiyosi Kawanisi
中科院分区：
文献类型：
--
作者：
Mohamad Basel Al Sawaf;Kiyosi Kawanisi
为了评估河流的动态，对不稳定流态下河流流量的可靠表征至关重要。在这项工作中，我们旨在研究山区溪流中与年度人工坝冲水释放相对应的浊度-流量（T-Q）动态特征。本研究使用了两种评估流量的方法：经典额定曲线和广岛大学开发的河流声学断层扫描（FAT）系统。有趣的是，在冲坝期间，FAT 获得的流量记录显示出不稳定水流行为的显着特征，例如流量肩，以及在某些情况下的二次流量峰值。根据T-Q磁滞回线，观察到的T-Q图案的常见类型是逆时针回线。在研究的 DF 事件期间，沉积物由位于河道不同地点的河岸提供。
To assess the dynamics of rivers, a reliable characterization of river streamflow during unsteady flow regimes is of paramount importance. In this work, we aimed at investigating the characteristics of turbidity–discharge (T–Q) dynamics corresponding to annual artificial dam flush release in a mountainous stream. Two methods for evaluating discharge were used in this study: the classical rating curve and the fluvial acoustic tomography (FAT) system that was developed by Hiroshima University. Interestingly, during dam flush, the discharge records obtained by FAT showed striking features of unsteady streamflow behavior, such as discharge shoulders and, in some events, secondary discharge peaks. According to the T–Q hysteresis loops, the common type of T–Q observed patterns were anticlockwise loops. During the studied DF events, sediment was supplied by river banks located at different sites along the river channel.