| 逐步图解法淹没式堰流公式推流的使用范围 |
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| 引用本文： | 赵天昌,程洁.逐步图解法淹没式堰流公式推流的使用范围[J].人民长江,2010,41(2):91-92. |
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| 作者姓名： | 赵天昌 程洁 |
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| 作者单位： | 江苏省骆运水利工程管理处,江苏,宿迁,223800 |
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| 摘 要： | 堰闸水文站出现淹没式堰流时可以使用逐步图解法定线推流,但小水位差时用自记水位推流,计算流量的误差可能很大。通过对淹没式堰流计算流量的不确定度的分析计算,得到水位差的百分不确定度XΔz,根据计算流量的不确定度要求,推算得到满足计算流量不确定度要求的水位差的范围:对于开宽大于2.0 m、下游水头大于0.5 m的堰闸站出现淹没式堰流时,只有水位差大于0.14 m时,才能使用自记水位推流。
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| 关 键 词： | 逐步图解法 淹没式 堰流公式 推流 使用范围 |
Application range of step-by-step graphical calculation of submerged weir flow formulas |
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| ZHAO Tianchang,CHENG Jie.Application range of step-by-step graphical calculation of submerged weir flow formulas[J].Yangtze River,2010,41(2):91-92. |
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| Authors: | ZHAO Tianchang CHENG Jie |
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| Affiliation: | ZHAO Tianchang,CHENG Jie(Luoyun Hydraulic Engineering Bureau of Jiangsu Province,Suqian 223800,China) |
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| Abstract: | We attempted to solve the problem of larger discharge errors calculated with small self-recorded water level and by step-by-step graphical calculation of submerged weir flow formulas. We obtained percentage uncertainty of water level difference through calculation and analysis of flow uncertainty calculated by submerged weir flow formula.According to uncertainty requirement of calculation discharge,the water level difference range meeting the requirement of calculation discharge uncertainty is obtained,i.e,... |
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| Keywords: | step-by-step graphical calculation submerged flow submerged weir flow formulas flow calculation application range |
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