摘要
丁坝的存在导致其附近的水沙结构发生变化,并对附近河道输水输沙能力产生影响。为了探究不同流量、泥沙粒径及河床糙率对插板透水丁坝坝后河道典型断面输水输沙能力的影响,采用数值模拟方法分析插板透水丁坝坝后^(#)6横断面河道宽深比、流速及挟沙力要素的变化规律。结果表明,糙率对河道典型断面输水输沙能力影响最大,即糙率>流量>粒径;随着流量、粒径、糙率增加,坝后断面流速、宽深比增大,并在坝头处流速达到最大值;坝头附近挟沙力增大,有利于河道输水输沙,减小主流区泥沙淤积。
The existence of spur dike leads to the change of the flow structure near the spur dike and affects the water and sediment transport capacity of the nearby river.In order to explore the influence of different flow,sediment particle size and riverbed roughness on the water and sediment transport capacity of typical cross-section river behind the spur dike,numerical simulation method was used to analyze the variation of width depth ratio,flow velocity and sediment carrying capacity of^(#)6 cross-section river behind the spur dike.The results show that the roughness has the greatest impact on the water and sediment transport capacity of typical river section,that is:roughness>flow>particle size;With the increase of flow,particle size and roughness,the cross-section velocity and width depth ratio behind the dam increase,and the velocity at the dam head reaches the maximum value;The increase of sediment carrying capacity near the dam head is conducive to the water and sediment transport of the river channel and reduce the sediment deposition in the mainstream area.
作者
毛亮
李玉建
李鹤
耿义鑫
MAO Liang;LI Yu-jian;LI He;GENG Yi-xin(College of Hydraulic and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Survey and Design Institute of Water Resources and Hydropower,Urumqi 830000,China)
出处
《水电能源科学》
北大核心
2021年第12期89-92,24,共5页
Water Resources and Power
基金
国家自然科学基金项目(51469032)。
关键词
插板透水丁坝
输水输沙
影响因素
数值模拟
permeable sheet piling spur dike
water and sediment transport
influencing factors
numerical simulation
