大阻力配水系统的水头变化问题探讨

从沿途泄流管道的能能分配出发，对其作用水头的确定进行了分析，并对大阻力配水系统的水头变化进行了探讨，结果表明，对沿途均匀泄流管道来说，其作用水头不能仅以压头为计算依据，而应以总水头为准，正是由于这一差异，使文献1]、2]对大阻力配水系统的水头变化及孔口出流量大小的结论是错误的，并指出了导致错误的原因。

Discussion on Change of Hydraulic Head in Large Resistance Underdrain System

On the basis of energy distribution in uniform discharge along porous pipe,this paper analyzes the definition of efficient water head,and discusses the change of hydraulic head in large resistance underdrain system.The results indicate that orifice efficient water head is total water head and is not hydraulic head for uniform discharge along porous pipe.Because there is the difference,the conclusion about change of hydraulic head and dischrge through orifice in large resistance underdrain system is mistaken in reference ［1］［2］,and some reasons of mistake are indicated.