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有漂浮植被河道水流特性试验研究

发表时间:2008-08-31  浏览量:1448  下载量:645
全部作者: 何宁,秦颖荣,赵振兴
作者单位: 河海大学环境科学与工程学院
摘 要: 用生物学方法治理河道污染操作方便,成本低廉,不产生二次污染,是近期许多学者研究的焦点。但是,河道种植植被后,河道的横截面积减小,断面过水能力受到影响,河道的输运行洪能力也发生改变。通过在矩形水槽中按不同方式种植个体较小、生长旺盛的大吀进行室内模型试验研究,利用三维超声波多普勒测速仪(acoustic Doppler velocimeter, ADV)分别测量按不同形状种植漂浮植被的矩形水槽中水流的瞬时流场,分析了植被附近区域水流在种植植被前后沿垂线方向的流速分布规律。结果表明:种植区前水位有一定的抬升,种植区的流速沿垂线分布由“J”形变为“)”形;而在种植区后区域,水流特性逐渐恢复正常。比较3种种植方式,对水流特性的影响都较小,其中以翼形的影响最小。
关 键 词: 生态修复;超声波多普勒测速仪;大吀;水流特性;种植方式;流速分布
Title: Experimental research on the hydrodynamic behavior of watercourse with aquatic floating plants
Author: HE Ning, QIN Yingrong, ZHAO Zhenxing
Organization: College of Environmental Science and Engineering, Hohai University
Abstract: The biological methods on river pollution treatment become the research focus for their convenient handling, low price, and none re-pollution. However, after planting the vegetation, the acreage of watercourse cross section reduced, the ability of carrying and flood-resisting changed. Indoor model test for hydraulic characteristics of common floating vegetation channels in ecological restoration was carried out. Healthy Pistia stratioes linn was planted in the rectangle model river-course in different shapes. The velocity of flow in different situation was measured by three-dimensional acoustic Doppler velocimeter (ADV). The change of the rule of velocity was analyzed. The outcome shows that the water level rises in front of the planting area, the velocity of flow in the planting area along the water depth changes from “J” to “)”, however, the hydrodynamic behavior comes back to the original condition quickly rearwards the planting area. Compared these three planting modes, the aerofoil mode has the minimum influence on hydrodynamic behavior.
Key words: ecological restoration; acoustic Doppler velocimeter; Pistia stratiotes; hydrodynamic behavior; planting mode; velocity distribution
发表期数: 2008年12月第16期
引用格式: 何宁,秦颖荣,赵振兴. 有漂浮植被河道水流特性试验研究[J]. 中国科技论文在线精品论文,2008,1(16):1808-1812.
 
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