微灌毛管水力设计的中孔水头比法(均匀管坡)——微灌水力设计计算方法探讨之五

The Mid-hole Head Ratio Method used in Hydraulic Designing of Micro-irrigation Sub-laterals

本文用积分作近似计算,导出了均匀坡条件下微灌毛管中孔水头比解析式,提出了由水头比表达的流量(和水头)相对偏差关系式,以及用中孔水头比公式进行微灌毛管水力计算的步骤,文中通过算例以演示计算过程,并验证本文方法的精度。

This paper has inferred an analytic formula of mid-hole ratio of micro-irrigation sub-laterals on condition of uniform slope in an approximate calculation with integral. It has put forward discharge(or head) relalive error relation expressed with head ratio, and the precedures of hydraulic calculation on micro-irrigation sub-laterals. An examphe is given to illuatrale the precedures, and 15 psove the accuracy of the method.