明渠非标准断面法测流水位流量关系的率定及影响因素分析  

Calibration and influencing factors analysis of stage-discharge relation of non-standard section method in open channels

作　　者：梁慧真 宗全利[1,2] 刘贞姬 谢炎[1] 刘冬冬 LIANG Huizhen;ZONG Quanli;LIU Zhenji;XIE Yan;LIU Dongdong(College of Water Conservancy&Architectural Engineering,Shihezi University,Shihezi,Xinjiang 832000,China;College of Resources and Environment,Qingdao Agricultural University,Qingdao,Shandong 266109,China)

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832000 [2]青岛农业大学资源与环境学院,山东青岛266109

出　　处：《排灌机械工程学报》2024年第2期147-153,160,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(12162030);青岛市科技惠民项目(22-3-7-xdny-19-nsh)。

摘　　要：为探究明渠非标准断面法测流的水位流量关系曲线的率定问题,以新疆第三师某团场25处渠道量水断面为研究对象,利用FlowTracker 2手持式声学多普勒流速仪进行了水位流量关系率定工作.根据实测结果,率定了各渠道量水断面的水位流量关系曲线,并对所率定出的曲线进行了符号检验、适线检验和偏离数值检验及误差分析,在此基础上,对流量拟合参数的影响因素进行了分析.结果表明:所率定的25处渠道量水断面中,14处具有稳定的水位流量关系,5处受回水影响、6处受渠道淤积影响为不稳定的水位流量关系;在渠道粗糙系数Ra、边坡系数m及坡降i相同的条件下,流量拟合参数与渠道底宽b总体上呈正相关;在渠道粗糙系数Ra、边坡系数m及底宽b相同的条件下,流量拟合参数与渠道坡降i总体上呈负相关.研究结果可以为灌区自动化量水设备测流准确性的校核提供参考依据.In order to explore the calibration problem of the stage-discharge relation curve for open channel non-standard section flow measurement,25 channel water measurement sections in a regiment field of the Third Division of Xinjiang were taken as the research object,and the stage-discharge relation was calibrated using a FlowTracker 2 handheld acoustic Doppler current meter.Based on the actual measurement results,the stage-discharge relation curves of each channel water-measuring section were calibrated,and the calculated curves were subjected to sign inspection,line fitting testing,deviation numerical testing,and error analysis.On this basis,the flow rate was simulated,and the influencing factors of the combined flow fitting parameters were analyzed.The results show that among the 25 calibrated channel water measurement sections,14 sections have stable stage-discharge relations,5 sections are affected by backwater,and 6 sections are affected by channel siltation and have unstable stage-discharge relations.Under the same conditions of channel roughness coefficient n,slope coefficient m and slope i,the flow fitting parameters generally correlates positively with the channel bottom width b.Under the same conditions of channel roughness coefficient n,slope coefficient m,and bottom width b,the flow fitting parameters generally correlates negatively with the channel slope i.The research results can provide a reference basis for checking the flow measurement accuracy of automatic water-measuring equipment in irrigation areas.

关 键 词：非标准断面法 水位流量关系曲线 率定 流量拟合参数 自动化量水 

分 类 号：S274.4[农业科学—农业水土工程]