INFLUENCE OF CHANNEL WIDTH ON THE FLOOD FLOWS IN A STREAM VALLEY
Investigative reports of flood disaster in a stream valley state that the magnitude of flood damages depends on the stream configuration. A meandering stream runs in mountainous basins through narrow valley. Flood damages were serious around the narrow apex of a bend. On the other hands, the damages were little serious around the wide apex. From this point of view, the stream width at the apex of a bend was focused on. The experiments with a doubly meandering compound channel were conducted to investigate the influence of channel width on the flood flows. Water surface flows were visualized, and water level was measured. The channel width influences on the magnitude of water surface velocity and divergence, implying that the scale of bank erosion can be difference. The magnitude is large in the case of narrow apex. On the other hand, the magnitude is small in the case of wide apex. This means that the flood damages can be explained by experimental results. As a result, it is supposed that appropriate river width must be taken into account to reduce the flood damages in a stream valley.
eztreme flood stream valley doubly meandering compound channel channel width
Kazuhiko Hattori Taisuke Ishigaki Tetsuo Ueno
Graduate school of Kansai University, Osaka, Japan Faculty of Environment and Urban Engineering, Kansai University, Japan Kyoto University, Japan
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
987-992
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）