多孔膜袋灌水均匀度变化规律研究  

Study on Variation Regularity of Irrigation Uniformity of Porous Membrane Bag

作　　者：张泽中[1] 王盈盈[1] 王国辉[1] ZHANG Zezhong WANG Yingying WANG Guohui(North China University of Water Resources and Electric Power, Zhengzhou 450045, Chin)

机构地区：[1]华北水利水电大学,河南郑州450045

出　　处：《华北水利水电大学学报（自然科学版）》2016年第6期20-23,共4页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：华北水利水电大学科技支撑人才计划项目(70500);河南省科技攻关计划专项(122102110050)

摘　　要：膜袋灌是一种新型的节水灌溉技术,能够提高灌溉水的利用率,从而达到节水的目的。结合膜袋出流孔的制造偏差应满足灌水器的精度要求,考虑不同的入口水头、铺设坡度、孔距和孔径,通过测量多孔膜袋沿铺设长度的流量分布情况,计算出不同条件下膜袋的灌水均匀度。结果表明:1多孔膜袋的灌水均匀度与膜袋长度呈负相关,与孔距和孔径呈正相关;2入口水头增加,灌水均匀度提高;3当多孔膜袋铺设于0.3%以上的坡度时,灌水均匀度呈降低趋势;当其铺设于0.3%以下的坡度时,灌水均匀度呈上升趋势。The film bag irrigation is a new water-saving irrigation technique. It can improve the utilization rate of irrigation water, so as to achieve the purpose of water saving. Combined with the manufacturing deviation of the membrane bag outlet holes should meet the requirements of the emitter precision, the uniformity of the membrane bags under different conditions was calculated by measuring the flow distribution along the laying length of the bag under the different inlet head, laying slope, pitch and aperture. The results showed ：①there was a negative correlation between the uniformity of water and the length of membrane bag, and it was positively correlated with pore distance and pore size; ② the inlet head increases as the irrigation uniformity increases; ③when the porous membrane bag is laid on the slope of 0. 3% or more, the uniformity of irrigation water tends to decrease; when it is laid on the slope of 0. 3% or less, the irrigation uniformity is on the rise.

关 键 词：节水灌溉 灌水均匀度 膜袋 工作水头 

分 类 号：TV93[水利工程—水利水电工程] S275[农业科学—农业水土工程]