干旱地区农业研究Issue(4)：54-56,103,4.
圆形断面临界水深新近似计算式
A new approximate formula of critical water depth in circular cross-section
摘要
Abstract
Aimed at the problems of large error and narrow applicable scope exiting in the trial and diagram methods generally used ,a new approximate formula of critical water depth in circular cross-section was proposed .The mathemati-cal model of critical water depth was set up through the mathematical transformation of critical flow formula in circular cross-section ,and the new approximate formula of critical water depth in circular cross-section was obtained by using least squares for programming computation .The example computation and error analysis indicated that the largest relative error of this formula was smaller than 1% in the practical scope of project .Compared with the existing formula of critical water depth in circular cross -section ,the new formula is more convenient in computation and broader in applicable scope ,and it can be applied for reference in engineering practices .关键词
数学建模/水力计算/临界水深Key words
mathematics model/hydraulic computation/critical water分类
建筑与水利引用本文复制引用
李蕊,王正中,王志刚..圆形断面临界水深新近似计算式[J].干旱地区农业研究,2013,(4):54-56,103,4.基金项目
国家863计划项目（2002AA62Z3191）；国家自然科学基金项目（51279168）；陕西省农业科技创新项目 （）
