【摘要】 本文就平坦地形微灌田间管网设计中单元内允许压差在支、毛管中合理分配理论进行分析，重申了美国Ｊ．Ｋｅｌｌｅｒ提出的平坦地形单元允许压差按０．４５的比例分配给支管设计理论的前提条件，并利用文献［２］提出的允许压差最优分配比计算公式，计算验证了Ｋｅｌｌｅｒ理论在其限定条件下的正确性。更多还原

【Abstract】 The theory of reasonable allocation of admissible pressure difference on leteral in a miniirrigation design unit in plain region is analyzed in this paper. The premise advanced by J. Keller (U.S) that 45% of the admissible pressure difference allocation on leteral in an unit in paean region was restated. A formula on calculating the allocation ratio of admissible Pressure difference was put forward after consulting reference[1]. The correctness of Keller theory was tested and verified by calculation under restrict condition.更多还原