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Calculation Method of Contraction Water Depth for Common Cross-section Based on MATLAB Language

YANG Mao-song1;WANG Qing2;and MA Zi-pu3(1.Chinese Water Conservancy & Hydroelectric Power Engineering Bureau No.5 Limited Company,Chengdu 610066,China;2.Institute of Water Conservancy & Hydroelectric Power Engineering Affiliated to Hehai University,Nanjing 210098,China;3.Water Resources & Architectural Engineering Institute Affiliated to Northwest A&F University,Yangling 712100,China)  
The cross-section contraction water depth is one of the most important parameters in hydraulic calculation.This study provides a calculation method of contraction water depth for four common cross-section types including circular section without pressure,square parabolic-shaped section,cubic parabolic-shaped section and city-doorway-shaped section through the concrete case based on MATLAB language.Compared with the traditional calculation methods including test calculation and graphic method,it is simple in the calculation process,high in the precision,and easy to master because it is calculated by adopting directly the theoretical formula.
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