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《Journal of North China Institute of Water Conservancy and Hydroelectric Power》 2012-05
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Simplified Computation of Critical Water Depth of Standard Door-shaped Waterway Tunnel

TENG Kai(Water Affairs Bureau of Qiqiha′er City,Qiqiha′er 161006,China)  
The calculation of critical depth of standard door-shaped water section must solve a transcendental equation.For the exsited problems involved in the chart method,trial method and approximate method so far,the optimized fitting method is adopted with minimum standard remaining difference as the target function.Within the range of applicable parameters of the works,fitting analysis and calculation is carried out to obtain an approximate formula.Its expression form is more simple and intuitive,and the number digit of its constants and coefficients is the least.Furthermore,it is easy to be in memory and practical application and its calculation accuracy meets design requirements(the maximum error is 0.57%),so it has some practical value.
【CateGory Index】: TV131.4
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Chinese Journal Full-text Database 2 Hits
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1 LIU Gang1,TENG Kai2(1.Qiqihar City Flood Control Headquarters Office,Qiqihar,Heilongjiang 161006,China;2.Qiqihar City Water Conservancy Affairs Bureau,Qiqihar,Heilongjiang 161006,China);Approximate Calculation Formula for Uniform Flow Depth of Trapezoidal Cross-section[J];Journal of Water Resources and Architectural Engineering;2012-01
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