不同铺设坡度及顺逆坡管长对滴灌管出水量及滴灌均匀度的影响研究

Different Laying Slopes and the Length of the Pipe Along the Slope to the Drip Irrigation Pipe Water Output and the Influence of Drip Irrigation Uniformity

为探究坡度及顺、逆坡管长对滴灌管出水量和滴灌均匀度的影响,选取内镶贴片式滴灌管为试验对象,以坡度和顺、逆坡管长为试验因素,比较了上述3个因素在不同水平下的滴灌管出水量和滴灌均匀度。结果表明在滴灌管入水口处出水量最大;随着距入水口越远出水量呈下降趋势;顺坡管长布置越长会导致滴灌均匀度越低;通过建立函数模型进行寻优结合大田应用在3种不同坡度下所能获得的最大滴灌均匀度分别为:0.9812、0.8966和0.9006。在坡地双向布置滴灌管时,为了获得较高的滴灌均匀度,选择合适的顺、逆坡管长组合尤其重要,应在上述函数模型获得最大均匀度时顺、逆坡管长相差较小的范围内选取,以保证滴灌均匀度满足要求。

In order to explore the impact of slope and length of forward and reverse slope pipes on water output and drip irrigation uniformity of drip irrigation pipes,the inlaid patch drip irrigation tube was selected as the test object.The slope and the length of the pipe with the slope and against the slope were examined as variables.The study compared the water output and uniformity of drip irrigation at different levels based on these three factors.The results showed that the highest water output was observed at the inlet of the drip irrigation pipe.As the distance from the inlet increases,the water output tends to decrease.Longer lengths of downslope pipes resulted in lower drip irrigation uniformity.By establishing a functional model for optimization,it is found that the maximum drip irrigation uniformity achieved under three different slopes is 0.9812,0.8966 and 0.9006.When laying drip irrigation pipes on slopes in both directions,selecting the appropriate combination of pipe lengths for the forward and reverse slopes is crucial for achieving high uniformity.It should be selected within the range where the length difference between the slope pipe and the reverse slope pipe is small when the maximum uniformity of the above functional model is obtained.To ensure that the uniformity of drip irrigation meets the requirements.