Research About Method To Calculate Directly Of Characteristical Depth Of Open Channel

The solving of the all kinds of section of critical depth,water depth at vena contraction,normal depth and conjugate water depth of Hydraulic Jump, substantially is to solve superformula and high-exponent formula with single quantity or many quantities of many unknown parameter ,in theory these square distances do not have analytic solution , in the course of realistic using ,the more familiar methods are trial computation ,iteration, needing graphic chart method and looks like to solve the method in the actual application etc., these methods are all hard to attain the unification of direct, accurate, and common using ,it make the system of method of Hydraulic computation incomplete,it is too blind and too tedious; developing continuously along with science and backlogging of researching works, different researching results appear constantly, various new method conceives continuously also, such as the matlab calculating way, the AGA etc., this to some extent not only solve some questions meeted in engineering practice, but also decrease the calculation step, raise the accuracy of computing. This text first sum up the methods of nearly 30 years about all kinds of section of critical depth,water depth at vena contraction,normal depth and conjugate water depth of Hydraulic Jump, through research and comparison,the optimizationally iteration,adapting handle and error analyze, initiatively select a series of analytic formulas of all kinds of typical section of critical depth,water depth at vena contraction,normal depth and conjugate water depth of Hydraulic Jump, these formulas meet the request of direct, accurate, and common using, synthetically evaluation express that the maximum error also meet the request, it can meet the need of production and practice. Secondly the text pointly use Newton iteration,cross iteration,difference method and matlab to research and computate critical depth of duplex trapezoidal,water depth at vena contraction in triangle and parabola form cross section and water depth at vena contraction in vice trapezoid section and U shape section ,get the formula with the character of short-cut, accurate, and common using .At last, connecting the researched content and the researching methods, put forwords some expects, which is basing on the research ,using AGA ,matlab and SPSS software to solve the all kinds of section of critical depth,water depth at vena contraction,normal depth and conjugate water depth of Hydraulic Jump, get out the more direct, accurate, and common using formula.