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Incipient motion of sediment in presence of submerged flexible vegetation
  • ISSN号：1672-1683
  • 期刊名称：《南水北调与水利科技》
  • 时间：0
  • 分类：TV142[水利工程—水力学及河流动力学] Q178[生物学—水生生物学;生物学—普通生物学]
  • 作者机构：[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, PR China
  • 相关基金：This work was supported by the China National Funds for Distinguished Young Scientists （Grant No. 51125034）, the State Key Program of the National Natural Science Foundation of China （Grant No. 51239003）, and the National Natural Science Foundation of China （Grants No. 51109066 and 51109065）.
作者： Hao Wang Hong-wu Tang Han-qing Zhao Xuan-yu Zhao Sheng-qi Lü[1]
关键词： 沉水植被, 泥沙运动, 柔性, 早期, 淹没, 沉积物粒度, 水流结构, 运动速度, Sediment incipient motion, Submerged flexible vegetation, Open channel, Experimentation, Sediment grain size, Water depth
中文摘要：

河床上的沉没植被的存在能改变水流动结构并且改变沉积运动的状态。在这研究，沉积的早期的运动在一个实验室实验面对在开的隧道的沉没灵活植被被调查。植被与柱体在平行数组安排了的灵活橡胶被模仿。植被密度，水深度，和早期的运动上的沉积谷物尺寸的效果被调查。试验性的结果显示沉积的早期的运动速度作为植被密度减少和水深度和沉积谷物尺寸增加增加。与灵活植物，沉积的早期的运动速度比它没有植被的低，并且比它与僵硬植被的大。一个一般早期的运动速度方程被导出，它能被用于灵活、僵硬的植被条件。

英文摘要：

The presence of submerged vegetation on river beds can change the water flow structure and alter the state of sediment motion. In this study, the incipient motion of sediment in the presence of submerged flexible vegetation in open channels was investigated in a laboratory experiment. The vegetation was simulated with flexible rubber cylinders arranged in parallel arrays. The effect of the vegetation density, water depth, and sediment grain size on the incipient motion was investigated. The experimental results indicate that the incipient motion velocity of sediment increases as the vegetation density decreases and the water depth and sediment grain size increase. With flexible plants, the incipient motion velocity of sediment is lower than it is without vegetation, and is larger than it is with rigid vegetation. A general incipient motion velocity equation was derived, which can be applied to both flexible and rigid vegetation conditions.

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期刊信息
  • 《南水北调与水利科技》
  • 中国科技核心期刊
  • 主管单位:河北省南水北调工程建设委员会办公室
  • 主办单位:河北省水利科学研究院
  • 主编：马静（执行）
  • 地址：石家庄市泰华街310号
  • 邮编：050057
  • 邮箱：nsbdqk@263.net
  • 电话：0311-85020535
  • 国际标准刊号：ISSN：1672-1683
  • 国内统一刊号：ISSN：13-1334/TV
  • 邮发代号:18-191
  • 获奖情况:
  • 全国中文核心期刊，2010-2011年度河北省科技类“...,第2届北方优秀期刊,2004-2005年度,2006-2007年度,2008-2009年度连续三届河北省优秀期刊
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,中国中国科技核心期刊,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）
  • 被引量:7681