作物分布对灌溉水流推进阻力实验研究

Experimental study on irrigation water flow propulsion resistance affected by crops distribution

现代化农业中,农作物在田面有规律的分布,会对灌溉水流的推进产生影响,作物在不同分布间距的情况下,水流阻力会有不同的变化。通过建立水力学模型,试验分析作物分布间距及灌溉水深变化对水流阻力的影响作用。结果表明:随着平均水深的不断增大,沿程阻力系数在整体上呈增大态势。不同坡度下均有沿程阻力系数随作物分布间距减小而增大的规律。且水深愈大不同植物分布间距沿程阻力系数的差异愈大。实验结果对合理布局作物分布,使灌溉水流在作物间有效可控地推进具有一定价值。

The crop distribution with different spacing has an impact on the irrigation water flow resist- ance. The effect of crop spacing and irrigation depth on water propulsion resistance was analyzed based on the hydraulic model. The results show that the coefficient resistance along the land increased with the increase of average water depth. The resistance coefficient along the land increased with the decrease of the crop spacing at all of the different slopes. And the effects were more significant when the water was deeper. The experimental results have a significance to choose the rational spacing of the crop distribu- tion, which makes the irrigation water flow in an effective and controllable way.