• 作者： Issam A. AL-KHATIB
• 作者服務機構： Department of Community and Public Health Birziet University
• 中文摘要： 對於複合式渠道之水力結構而言，如何估算主渠道和洪水平原的流量是重要的。文中使用對稱矩形複合斷面之渠道作試驗，研究斷面幾何效應與流量比之關係。由研究顯示主渠道寬度B和階梯高度Z會影響流量比。試驗中使用六種模型配合各種不同之流量。由流量比和相對水探之關係同時建立經驗關係式，再藉由形狀、因子之考慮建立一般通式。
• 英文摘要： For hydraulic structures in compound channels, it is essential to estimate the discharge not onlyin the main channel, but also on the floodplains. An experimental work was conducted in channels withsymmetrical rectangular compound sections to investigate the geometry effect of the cross section ondifferent discharge ratios．It was found that both the main channel width, B, and step height, Z, affectedthese ratios．Six different models were tested in a laboratory flume for a large range of discharges. Thedifferent discharge ratios are related to the relative depth, and general equations are derived for them.Variation of the discharge ratios with the relative depth are generalised by introducing a shape factor forthem.
• 中文關鍵字： open channel; discharge distribution; compound cross section
• 英文關鍵字： --