植被群落之间水流流速垂向分布计算方法  

A calculation method of flow velocity vertical distribution among vegetation community

作　　者：惠二青[1,2] 江春波[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点试验室,北京100084 [2]中国长江三峡集团公司,湖北宜昌443002

出　　处：《水力发电学报》2011年第1期84-88,共5页Journal of Hydroelectric Engineering

基　　金：国家"九七三"重点基础研究发展计划(2006CB403304);国家自然科学基金(51009081);重点实验室资助项目(2008-ZY-5)

摘　　要：植被之间及其之上流速分布一直是湿地水力学和河流水力学的研究难点。将Darcy-Weisbach阻力因子与植被生态特征参数(植被直径、植被高度和植被空间间距)联系起来,建立新的阻力因子计算方法。将Darcy-Weisbach断面流速公式应用于植被之间流速垂向分布计算,利用室内水槽试验结果对其进行了验证,结果表明:改进后的Darcy-Weisbach公式可以较好的模拟植被之间及其之上流速垂向分布。Vertical distribution modeling of velocity inside and above the plant community is a difficult issue in the field of river and wetland fluid mechanics.In this paper,a new method for friction factor calculation was developed by relating the Darcy-Weisbach friction factor to the plant ecological parameters,such as plant diameter and spacings.The vertical profile of velocity inside and above the vegetation was calculated with the Darcy-Weisbach formula,and verified by flume experiment.Result shows that the modified formula improves the accuracy in calculation of the vertical profile inside and above the plant community.

关 键 词：水力学 流速垂向分布 植被群落 阻力因子 Darcy-Weisbach断面流速公式 

分 类 号：TV143[水利工程—水力学及河流动力学]