| Cite this article: | 梁谦,程建萍,田建良,等.输水渠道设计中糙率取值的模型分析[J].灌溉排水学报,0,():-. |
| liangqian,Cheng Jian-ping,Tian Jian-liang,et al.输水渠道设计中糙率取值的模型分析[J].灌溉排水学报,0,():-. |
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| Experimental study on the influence of hydraulic factors on the design of irrigation canal |
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liangqian1, Cheng Jian-ping1, Tian Jian-liang2, Xiao Rang2, Li Xing2, Ma Cheng-xiao3
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1.HeXi University;2.He Xi University;3.College of Water conservancy & Building Engineering Shi He Zi University
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| Abstract: |
| This paper mainly studies the relationship between the hydraulic factors which affect the design section in the design of water conveyance channel. The hydraulic model test is used to measure the value of hydraulic factors under different flow rate, and through analysis and comparison, the parameter value and the relationship of hydraulic factors are concluded. According to the test and analysis, in the hydraulic calculation and design of the water conveyance channel, frictional head loss is mainly along the way; In the process of water conveyance, the factors that affect the frictional head loss are not only the velocity and flow, but also the roughness and flow pattern; At the same time, the relationship between water depth and discharge of channel section is not a simple linear relationship, which should be determined by model test or theoretical calculation of channel water surface curve according to different channel section shapes in design; The selection and use of roughness value of designed water conveyance channel can not only take the middle value of roughness value range, but also comprehensively determine the flow pattern, construction level and operation life. |
| Key words: Weir discharge; Frictional head loss; Average velocity of cross section; Roughness |
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