微灌自压软管毛管灌水均匀度的试验研究

Experimental Research on Capillary Irrigation Uniformity of Micro-irrigation Gravitational Flexible Hose

自压软管微灌技术通过灌溉渠道与大田的水位差和地面的自然坡降,利用干管、支管、毛管三级软管实现自流灌溉。通过试验分析了毛管铺设长度、压力水头、铺设坡度、滴孔间距等参数对毛管灌水均匀性的影响,给出了各参数的合理取值范围。结果表明铺设长度、坡度对均匀度影响显著,均匀度随铺设长度增大而减小,随坡度增大呈先增大后减小的趋势;毛管压力水头、滴孔间距对均匀度影响不太显著。

Gravity irrigation is realized by micro-irrigation gravitational flexible hose technique through the slope of the field surface and water head between irrigation channel and field surface. The irrigation system consists of three grades hose： main pipe, branch pipe and capillary. Through experiment, the influence of hose laying length, pressure head, laying slope and drip-hole interval on the irrigation uniformity was analyzed, and the rational value scope of each parameter was provided in this paper. The research results indicated that hose laying length and slope had remarkable influence on the irrigation uniformity; irrigation uniformity reduced along with the increase of hose laying length, and increased at first and then reduced along with the increase of laying slope. Hose pressure head and drip hole interval affect the irrigation uniformity unremarkable.