| Cite this article: | 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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| DOI： |
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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 |
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