山溪卵石性河床流速分布规律试验研究
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摘要
山溪河流具有流速大、水深小、流态多变的特点,其河流河道多为卵砾石结构,为分析其河床流速分布规律,利用变坡玻璃水槽对卵石性河道进行了模拟试验,在保证恒定均匀流的条件下,改变宽深比,分析水流垂线流速分布规律并最终得出其表达式;探讨了水槽粗糙系数的影响因素及其变化规律。结果表明,当坡度在一定范围内(1/200 Mountain river has characteristics of high velocity,small river depth and changeable flow pattern,which is mostly gravel structure of the river channel.To analyze the velocity distribution of the riverbed,a series of experiments about pebble channel were conducted in a glass flume with adjustable slope.Under the condition of constant uniform flow and different breadth depth ratio,the distribution of vertical velocity of water was analyzed and the expression of the velocity distribution was obtained.At the mean time,influencing factors and variation law of the roughness of flume were discussed.The results show that when the slope is within a certain range(1/200
引文
[1]卢金友,詹义正,赵根生,等.河道中受侧壁影响的断面流速分布规律研究[J].水利学报,2012,43(6):645-652,658.
[2]孙东坡,王二平,董志慧,等.矩形断面明渠流速分布的研究及应用[J].水动力学研究与进展:A辑,2004,19(2):144-151.
[3]赵明登,槐文信,李泰儒,等.明渠均匀流垂线流速分布规律研究[J].武汉大学学报:工学版,2010,43(5):554-557.
[4]万俊,何建京,王泽.光滑壁面明渠陡坡流速分布特性[J].水动力学研究与进展:A辑,2010,25(1):37-43.
[5]Kandula V N Sarma,P Lakshminarayana,N S Lakshmana Rao.Velocity Distribution in Smooth Rectangular Open Channels[J].Journal of Hydraulic Engineering,1983,109(2):270-289.
[6]水利部水文司,等,译.明渠水流测量[M].北京:中国科学技术出版社,1992.
[7]J T Limerinos.California Department of Water Resources.Determination of the Manning Coefficient from Measured Bed Roughness in Natural Channel[R].Washington:United States Government Printing Office,1970.
[2]孙东坡,王二平,董志慧,等.矩形断面明渠流速分布的研究及应用[J].水动力学研究与进展:A辑,2004,19(2):144-151.
[3]赵明登,槐文信,李泰儒,等.明渠均匀流垂线流速分布规律研究[J].武汉大学学报:工学版,2010,43(5):554-557.
[4]万俊,何建京,王泽.光滑壁面明渠陡坡流速分布特性[J].水动力学研究与进展:A辑,2010,25(1):37-43.
[5]Kandula V N Sarma,P Lakshminarayana,N S Lakshmana Rao.Velocity Distribution in Smooth Rectangular Open Channels[J].Journal of Hydraulic Engineering,1983,109(2):270-289.
[6]水利部水文司,等,译.明渠水流测量[M].北京:中国科学技术出版社,1992.
[7]J T Limerinos.California Department of Water Resources.Determination of the Manning Coefficient from Measured Bed Roughness in Natural Channel[R].Washington:United States Government Printing Office,1970.