被高堤嵌住的河床又宽又深，满盛着一川铁灰色的砾石。
The riverbed contained by the dike was deep and broad lined with iron-grey shingle.
影响汇流口的主要控制因素有：汇流比、汇流角、河床高差、宽深比、汇流口下游干流弗劳德数等。
All of them are controlled by following factors: discharge ratio, junction Angle, difference in bed height, width to depth ratio and Froude number downstream the confluences.
黑河下游河道都是天然河道，断面不规则，属宽浅型沙质河床，河道渗漏量大。
The river courses in the lower Heihe river are all natural ones with irregular cross sections and great seepage, belonging to broad-shallow type of sandy riverbed.
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