【摘要】 通过一系列的水槽试验,研究了交汇角为30°时不同水沙条件下干流床面冲淤特性,获得了在支流有无来水、来沙时不同主支汇流比下的干流床面冲淤二维等值线图,初步揭示了干流床面冲淤随主支流量比及支流是否来沙的变化特性。研究成果对了解交汇区的冲淤变化及河床演变具有积极的作用。更多还原

【Abstract】 There are complex interrelationships and internal mechanisms among bed form,sediment transport and flow structure in natural river,in particular in confluent river.The experiments were conducted in flume including different cases,e.g.,without branch flow,branch flow with clear-water,branch flow with both water and sediment.The stable bed morphology in every case was measured and analyzed with different discharge ratios q~* of the branch channel flow Q_b to combined tail-water flow Q_t.The characteristics of variation of bed morphology of main channel under above-mentioned cases were revealed.更多还原