明渠水流测线平均流速横向分布及其应用  

Lateral Distribution of Average Vertical flow Velocity and Its Application in Open Channel

作　　者：韩金旭[1] 李敬茹[2] 杜凯[1] 蔡大应[1] 李昭悦[1] 

机构地区：[1]黄河水利科学研究院,郑州450003 [2]黄河勘测规划设计有限公司,郑州450003

出　　处：《灌溉排水学报》2013年第3期71-73,100,共4页Journal of Irrigation and Drainage

基　　金：国家重点基础研究发展计划(2011CB40330305);"十二五"国家科技支撑计划(2012BAB02B0403);中央级公益性科研院所基本科研业务费专项资金项目(HKY-JBYW-2012-15)

摘　　要：基于室内与田间试验,分析了明渠水流流速分布特性,提出了水流测线平均流速横向分布抛物线规律和明渠测流方法。结果表明,抛物线规律表达测线平均流速横向分布具有较高的计算精度,在(1-2x/B)>0.1的范围,实测与拟合计算流速的相对误差在±5%之间;利用测线均速抛物线规律对不同渠形测流具有良好的适用性,相对误差在±5%之间,且减轻了田间施测工作量和便于灌区测流自动化。Based on indoor and field experiments, velocity distribution properties of open channel were ana- lyzed, the parabolic law for lateral distribution of average vertical flow velocity was established in open channel , and the method for flow measurement in open channel was put forward based on the parabolic law. The results showed that apart from a few point, the fractional errors between measured velocities and calculated velocities by the parabolic law were smaller than ±5% when （1--2x/B）〉0. 1. In addition, the method for flow measurement was adapt to different forms of channels with high accuracy.

关 键 词：明渠 测线平均流速 抛物线律 量水 

分 类 号：S274.4[农业科学—农业水土工程]