| 引用本文: | 焦 萱,赵兰浩,王正中,等.实测堰流精度效应影响下的泄流计算方法研究[J].灌溉排水学报,2022,41(6):105-112. |
| JIAO Xuan,ZHAO Lanhao,WANG Zhengzhong,et al.实测堰流精度效应影响下的泄流计算方法研究[J].灌溉排水学报,2022,41(6):105-112. |
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| 摘要: |
| 【目的】明确直角堰在不同结构布置选型下的超泄特性与其大小关系。【方法】针对简化综合流量系数假设下，基本堰流关系模型率定中的短系列多元回归处理范式使用局限问题，由试验统计特征下的不同实测堰流精度率定结果发现了短系列因果映射关系中的实测堰流精度统计效应，进而建立了多维可变堰流特征变量模糊概率关联分布识别和实测堰流精度效应下的一致性泄流响应机制。【结果】超泄特征变量前后堰宽比a/c、侧堰长度b和展宽比L/W参与的多元短系列泄流计算是一种区别于传统直线型断面因果映射关系模型的多维可变模糊概率关联分布响应；从算法机理的角度揭示了相同堰顶水头H下，前后堰宽比a/c、侧堰长度b和展宽比L/W对于指标测流量[Q'cr]的表征贡献无先后大小之分，具有同等显著地位。【结论】综合现有文献成果中不同短系列实测堰流精度样本的应用率定与验证表明，方法计算结果和试验统计结果一致性较好，研究成果可为相关工程的复核设计提供参考。 |
| 关键词: 直角堰型；试验统计；基本堰流关系模型；实测堰流精度；泄流计算方法 |
| DOI：10.13522/j.cnki.ggps.2021421 |
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| 基金项目: |
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| Calculating Water Flow Rate with Measurement Errors of the Weir Considered |
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JIAO Xuan, ZHAO Lanhao, WANG Zhengzhong, QIU Yong
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1. College of Water Resources and Hydropower, Hohai University, Nanjing 210024, China;
2. Cold and Arid Regions Water Engineering Safety Research Center, Key Laboratory Agricultural Soil and
Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Xi’an 721000, China;
3. Sate Key Laboratory of Frozen Soil Engineering, CAS, Lanzhou 730000, China;
4. College of Water Resources and Hydropower, Yunnan Agricultural University, Kunming 650201, China
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| Abstract: |
| 【Objective】 Weir is a classical apparatus measuring water flow rate in open channels. Its accuracy and the formula used to calculate flow rate depend on many factors. In this paper, we proposed a new method to calculate flow rate with measurement errors of the Weir taken into account. 【Method】Considering the limitation of short series in multiple regression for calibrating the basic weir flow using the simplified lumped flow coefficient, the statistical effect of the accuracy of weir-measured flow in short series causal mapping relationship is found from the calibration results of different measured weir flow accuracy under the experimental statistical characteristics. The consistent response mechanism under the effect of multi-dimensional variable weir flow characteristic variable fuzzy probability correlation distribution identification and measured weir flow accuracy is established. 【Result】The multivariate short series discharge calculation involving the front and rear weir width ratio a/c, the side weir length b and the expansion ratio L/W is a multidimensional variable fuzzy probability correlation distribution response different from the traditional linear section causal mapping model; From the perspective of algorithm mechanism, it is revealed that under the same weir crest head H, the contribution of front and rear weir width ratio a/c, side weir length b and widening ratio L/W to the characterization of the index measured discharge [Q'cr] is of equal significance.【Conclusion】The application calibration and verification of different short series measured weir flow accuracy samples in the existing literature results show that the calculation results of the method are in good agreement with the experimental statistical results, and the research results can provide reference for the design review of similar projects. |
| Key words: right angle weir type; test statistics; basic weir flow model; measured weir flow accuracy; discharge |
