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中文摘要：
利用水槽试验研究了无草、淹没型、非淹没型柔性植物水流阻力特性的变化规律,分析了含植物明渠沿程水面比降和阻力系数的变化特性。得到各植物阻力系数变化与尼库拉兹曲线基本相似,紊流范围内同样可划分为紊流光滑区、紊流过渡区、紊流粗糙区;探讨了各植物明渠等效河床的问题,据此确定了各植物的粗糙度,对植物粗糙度、水流雷诺数和阻力系数之间的关系进行了分析,并通过对各植物水流阻力系数的分区回归计算,得到各植物水流阻力的分区经验表达式,该方法能较好地应用于含植物明渠水流阻力系数的推求。
英文摘要：
Flume experiments were carried out for studying the variation rule of flow resistance characteris-tics,in open channel with submerged and unsubmerged flexible vegetation,and the variations of on-waywater surface slope and drag coefficient of open channel with the three plants are analyzed. It is found thatthe variation of drag coefficient of each plant is similar with Nikuradse curve in general. Turbulent flowrange can be divided into turbulent smooth zone,turbulent transition rough zone,and turbulent drag roughzone. The problem of vegetafion equivalent bed is counted and the relationship between flow resistance coef-ficient and roughness for each plant is obtained accordingly. Regression analysis on the relationship verifiedthat the method can be applied to deduce the resistance coefficient of open channel flow with plants.
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