| 引用本文: | 阎烁,王立权,李铁男,等.复式断面渠道渠系水利用系数测算方法研究[J].灌溉排水学报,0,():-. |
| yanshuo,wangliquan,litienan,et al.复式断面渠道渠系水利用系数测算方法研究[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】研究农业灌区复式断面渠道渠系水利用系数更精确的测算方法。【方法】本文采用动水测定法测定渠道各断面水力要素，之后通过修订后的戴维斯－威尔逊公式和考斯加科夫渠道渗漏经验公式求得研究区域复式断面渠道渠系水利用系数，对比分析各渠道水损失以及渠系水损失量。【结果】动水测定法更适合不断流复式断面渠道水力要素测算；采用的标准梯形断面渠道衬砌的方式渠道损失最小；考斯加科夫渠道渗漏经验公式求得灌区渠系水利用系数0.75，而戴维斯－威尔逊公式求得灌区渠系水利用系数为0.82，更加接近实际值0.86，精确度提高了9.5%。【结论】由于占地、开挖等影响因素，灌区渠系衬砌后多形成复式断面渠道，灌区渠道衬砌优先采用标准梯形断面衬砌方式。对于这类渠系工程，动水测定方法明显优于典型渠道测量方法，戴维斯－威尔逊公式也更适用于复式断面渠道的渠系水利用系数的测定。 |
| 关键词: 动水测定法；渠系水利用系数；戴维斯－威尔逊公式 |
| DOI： |
| 分类号:S274.2 |
| 基金项目: |
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| Study on Calculation Method of Water Utilization Coefficient of Canal System of Duplex Section |
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yanshuo1, wangliquan1, litienan2, qinlongfei3
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1.heilongjiangdaxue;2.Heilongjiang Water Conservancy Research Institute;3.Zhaoqing Water Conservancy and Hydropower Survey and Design Institute Co., Ltd
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| Abstract: |
| 【Objective】Study on a more accurate method for calculating the water use coefficient of canals and canals in a compound section of an agricultural irrigation area 【Method】In this paper, the hydrodynamic factors of each section of the channel are determined by the dynamic water measurement method. Then, the revised Davis-Wilson formula and the Kosgakov channel leakage empirical formula are used to obtain the water utilization coefficient of the canal system of the multi-section canal system in the study area. Compare and analyze water loss and canal water loss in each channel. 【Result】The dynamic water measurement method is more suitable for the calculation of the hydraulic elements of the continuous flow section channel system; the standard trapezoidal section channel lining method has the smallest channel loss; the Kasgakov channel leakage experience formula is used to obtain the canal water utilization coefficient of the irrigation area 0.75 The Davis-Wilson formula finds that the canal water utilization coefficient of the irrigation area is 0.82, which is closer to the actual value of 0.86, and the accuracy is improved by 9.5%. 【Conclusion】Due to the influencing factors such as land occupation and excavation, the multi-section canal system is formed after the lining of the canal in the irrigation area. The channel lining of the irrigation area is preferably lining by trapezoidal section. For this type of canal system, the dynamic water measurement method is obviously superior to the typical channel measurement method. The Davis-Wilson formula is also more suitable for the determination of the canal water utilization coefficient of the complex section canal system. |
| Key words: hydrodynamic method; water utilization coefficient of canal system; Davis-Wilson formula |
