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《Journal of Water Resources and Architectural Engineering》 2012-03
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Simplified Calculation Method for Contracted Water Depth of Rectangular Cross-section

WANG Zhi-yun1,TENG Kai2(1.Qiqihar City Quality and Safety Supervision Station of Hydraulic Engineering,Qiqihar,Heilongjiang 161006,China;2.Qiqihar City Water Conservancy Affairs Bureau,Qiqihar,Heilongjiang 161006,China)  
According to the complicated calculation and low accuracy of fruits in the contracted water depth calculation of rectangular cross-section,and after sorting out the basic equations for the calculation,the power series is introduced and simplified to get the relatively simple iteration early-value function.Then after the first iteration,the approximate calculation formula is deduced by the mathematical method,which is simple,easy to remember and compute,convenient for practical application,and reliable in the result's accuracy.The analysis and application results show that in the range of practical engineering(ie,0α≤0.4,α as dimensionless water depth),the relative error of the calculation is less than 0.54%,which has a good application value.
【CateGory Index】: TV131
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【References】
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7 Zhao Yanfeng1,2,Wang Zhengzhong1,2,Lu Qin1 (1.College of Water Resources and Architectural Engineering,Northwest Agriculture and Forestry University,Yangling 712100,China;2.Reseach Center of Water Engineering Safety and Disaster Prevention,Northwest Agriculture and Forestry University,Yangling 712100,China);Formula for direct calculation of contracted depth of channel with trapezoidal section[J];Transactions of the Chinese Society of Agricultural Engineering;2009-08
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