橡塑渗灌管渗水性能实验研究

对一种橡塑渗灌管产品，应用蒸馏水进行自由渗流实验。结果表明：渗水速率随渗水时间的延长逐渐降低，最终趋于相对稳定。在0～7 mH₂O压力范围内，渗水速率与水头压力之间呈幂函数关系，渗水均匀性随水头压力发生变化；同应用蒸馏水相比，应用自来水实验导致渗水速率和渗水均匀性降低，增大水头压力有助于提高渗灌管的抗堵塞性能。研究表明，供试橡塑渗灌管的渗水性能受水头压力影响较大，渗水均匀性有待提高。

Experimental study on discharge characteristics of a subirrigation porous pipe

A subirrigation porous pipe was tested in laboratory using distilled water. Results show that the emission rates of the pipe decline with time first and then reach a relative stable value. In the range of pressure from 0 to 7.0 mH₂O, the emission rates expose a power function with the operating pressure. The emission uniformity of the pipe also varies with pressure. Compared with the results using distilled water, applying tap water in the tests leads to decrease in both emission rates and emission uniformity, while pressurization helps to weaken clogging in the pipes. The study indicates that the effect of operating pressure on discharge characteristics of the subirrigation porous pipe is remarkable, and the emission uniformity of the pipe is in need of improvement.