膜片式多孔管灌水技术研究

为了解决滴灌系统造价高、耗能高,渗灌系统易堵塞、堵塞后难发现、难检修的缺点,本文研究提出了一种新型的果园节水灌溉技术—膜片式多孔灌溉水技术。通过对不同孔径、孔距的毛管,在不同水压力下毛管泄流量的测定,确定出水压力与单孔泄流量的关系为q=kH~X,然后利用勃拉修斯公式计算最大毛管长度,表明允许毛管长度与孔径、孔距关系非常密切;采用计算所得的毛管长度,现场测试其流量偏差率,测度结果总体能够满足要求,膜片式多孔灌能够在经济比较落后,水源缺乏且有微小水源的干旱地区使用。

Study on Irrigation Techniques Using Multi-hole Pipe with Diaphragm

In this paper,a new type method of orchard water-saving irrigation using multi-hole with diaphragm was studied and designed so that overcome a serious of defect of drip irrigation system, such as higher cost, higher energy consume, easy to be filled and difficulty overhauled under the ground. By measuring water flow of fine pipe under the conditions of various hole diameter and interval distance,the relationship between water pressure and flow of single hole can be determined such as q=kHx,the maximum length of fine pipe can be calculated using Bolaxius formula,and also deviation ratio of water flow of pipe was tested in the field for adopted length. The results showed that this technique was suitable and feasible for practice in the arid and semi-arid regions where wate supply was shortage.