Experimental Study on Bed Morphology at Channel Confluence with Tributary Action
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 Qb to combined tail-water flow Qt. The characteristics of variation of bed morphology of main channel under above-mentioned cases were revealed.