Journal of Earth Science & Climatic Change
Open Access

Abstract

General scour of river structures during flooding has been an important issue in riverbed stabilization and river engineering. Researchers in hydraulic engineering have consistently been interested in understanding of riverbed changes during flooding. The numbered-brick column or chains that could only observe the general scour depth of riverbed. This study develops wireless tracer offering monitoring with the numbered-brick chain. At gravel-bed river section of Choshui River in central Taiwan, the developed method successfully observed the riverbed changes during typhoon. Wireless tracers also can observe surface velocity indirectly. Two monitoring points are installed on the upper and lower reaches of riverbed. The distance between the river centers of the monitoring points (L) and differences in the time signals received (T) are used to observe indirectly the surface velocity of the riverbed mainstreams (L/T = Us). In the future, an automatic monitoring system of flood flow can be taken to observe the riverbed changes in different weather condition; this not only helps to identify the riverbed scour process of unsteady flow, but also helps to improve on flood prevention engineering, bridge closure detection, and emergency evacuation.

Biography

Han-Chung Yang has completed his PhD from Nation Taiwan University and Postdoctoral studies from Nation Taipei University of Technology. He is the Associate Professor of Shu-Te University. He has published more than 10 papers in reputed journals and has been serving as a member of Taiwan Agricultural Engineers Society.