冲积河流沙波阻力规律研究  

Research on Alluvial Resistance of Dunes

作　　者：董其华[1] 赵连军[1] 顾霜妹[1] 

机构地区：[1]黄河水利委员会黄河水利科学研究院水利部黄河泥沙重点实验室,郑州450003

出　　处：《中国农村水利水电》2016年第2期57-59,共3页China Rural Water and Hydropower

基　　金：国家自然科学基金资助项目(51379086);国家自然科学基金资助项目(51209101);"十二五"国家科技支撑计划项目(2012BAB02B00)

摘　　要：基于花园口河段沙波实测资料,通过数学模型的试糙计算,分析不同沙波尺寸对阻力的影响。分析认为在床面阻力一定时,综合阻力和沙波阻力均随波长的增大而增大,但增长的速度却随波长的增大而减小,波长超过800m以后增长速度更慢;综合阻力和沙波阻力均随比降的增大而增大;沙粒阻力一定时,沙波阻力所占的比例随沙波的尺寸增大而增大,当波长增大到1 200m时,沙波阻力所占的比例可以增大到50%左右。Based on the measured sand wave data of Huayuankou River,the sand wave roughness in different sizes is calculated by using a mathematical model.It is believed that when the bed roughness is constant,both comprehensive resistance and form resistance become larger with the increase in the wavelength,but the speed of growth gets slower with the increase in wavelength and even slower when wavelength is larger than 800 m.Comprehensive resistance and form resistance get larger with the increase of the slope.When the surface roughness is constant,the proportion of the form roughness gets larger with the increases in the size of the sand wave.When the wavelength increases to 1 200 m,the proportion of the form roughness can increase to around 50%.

关 键 词：阻力 沙波 数学模型 

分 类 号：TV142[水利工程—水力学及河流动力学]