摘要
研究植被与河道水流的相互作用,对于防洪和生态环境治理具有实际意义。总结了沉水植被和挺水植被对水流的阻力的研究进展情况。针对单一类型植被对水流的阻力已经开展了物理模型试验研究,但试验中忽略了植被的生态特征变化对水流运动的影响。已有的植被对水流阻力的数值模型,是通过调整河床糙率来考虑沉水植被对水流的阻力,采用圆柱绕流的阻力公式计算挺水植被引起的水流阻力。今后在分析植被对水流运动影响的研究时,需要进一步考虑植被的多样性和生态特征。
The study on the interaction between vegetation cover and river flow is of significance for the flood control and ecoenvironment management. This paper sums up the research advancement of flow resistance from submerged and unsubmerged vegetations. To understand the resistance of single vegetation on the water flow, many physical model experiments had been carried out, but the effect of the change of ecological characteristics of vegetation on water flow resistance was neglected in the experiment. Many mathematical models had been proposed to simulate the water flows, the flow resistance from submerged vegetations was calculated by adjusting the roughness parameters of the river bed, but the flow resistance from the un-submerged vegetations was calculated according to the resistance equations for the flow around the circle cylinders. In the future study, the diversity and the ecological properties of vegetation should be taken into account.
出处
《水力发电》
北大核心
2009年第7期11-13,共3页
Water Power
基金
国家重点基础研究发展计划项目(2006CB403304)
国家自然科学基金项目(90610028)
水沙科学与水利水电工程国家重点实验室自主研究课题资助项目(2008-ZY-5)
关键词
河道水流
植被
阻力
流速分布
river flows
vegetation
resistance force
velocity distribution
