自压管道输水灌溉是以管道代替明渠输水灌溉的一种工程形式。自压管道输水减少了输水过程中的渗漏与蒸发损失,井灌区管道系统水利用系数在0.95以上,比土渠输水节水30%左右,节能20%～30%。渠灌区采用管道输水后,比土渠节水40%左右。 Self-pressured pipe water conveyance is an engineering form that uses pipes to irrigate open channels. Water loss from self-pressured pipelines reduces leakage and evaporation losses during the water conveyance. The water utilization coefficient of the pipe system in the well irrigated area is above 0.95, which saves about 30% of water and water than the canals, saving 20% ​​to 30% of the energy. Drainage irrigation pipe after the use of pipelines, about 40% water saving than canals.