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《Journal of Northwest Sci-Tech University of Agriculture and Forestry(Natural Science Edition)》 2006-01
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Pandect for the calculating methods of the critical depth of opening channel in different typical cross sections

WANG Zheng-Zhong~(1,2),CHEN Tao~1,WAN Bin~3,SHEN Yong-kang~4(1 College of Water Conservancy & Construction Engineering,Northwest A & F University,Yangling,Shaanxi 712100,China;2 State Key Laboratory of Frozen Soil Engineering,CAS,Lanzhou,Gansu 730000,China;3 Water Conservancy Government Department of Shandong Province,Jinan,Shandong 250013,China;4 College of Civil Engineering,Hehai University,Nanjing,Jiangsu 210098,China)  
The paper summarized the calculating methods of the critical depth of opening channel in different typical cross sections in the past three decades.After comparing the forms and the errors of all,the authors selected an optimum iterative method to deal with the items,and gave a series proper equation to meet the demands of engineering practice.These equations are simple,accurate and commonly used.The errors of these equations are within 2%,most of them are less than 1%.The new method of the paper will give enlightenment in solving problems of transcendental equation with several unknown parameters.
【Fund】: 国家“863”高技术研究与发展计划项目(2002AA62Z3191);; 国家冻土工程重点实验室项目(9901)
【CateGory Index】: TV133
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