植被覆盖的河道水流纵向流速垂向分布  

Vertical velocity distribution of longitudinal flow in a vegetated channel

作　　者：惠二青[1] 江春波[1] 潘应旺[1] 

机构地区：[1]清华大学水利水电工程系,水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2009年第6期834-837,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家“九七三”重点基础研究发展计划(2006CB403304);国家自然科学基金资助项目(90610028)

摘　　要：为研究天然湿地灌木植被群落交错区植被特征参数垂向变化对水流流速垂向分布的影响,进行了室内实验。在室内水槽种植灌木植被和灌木-草本植被,沿纵向方向设置5个监测断面,垂向布设若干测点,利用Doppler流速仪测量纵向流速,比较分析单一灌木植被群落和群落交错区内纵向流速垂向分布规律。结果表明:植被之间水流纵向流速垂向分布近似为双曲线;植被冠层以上流速垂向分布符合幂函数曲线。The effects of vertical changes in the vegetation characteristics on the vertical flow velocity distribution were studied in a natural wetland ecotone modeled by shrubs mounted in a flume with five velocity profile measurements in the longitudinal direction. Longitudinal flow velocity was measured by a Doppler flowmeter. The results show that the vertical distribution of the longitudinal velocities in the single shrub community is approximately hyperbolic inside the shrubs and follow a power function above the shrubs.

关 键 词：植物覆盖的河道 流速分布 灌木群落 群落交错区 

分 类 号：TV143[水利工程—水力学及河流动力学]