我省垦区田间排水工程,有2.4～4.8米间距的墒沟,20～40米间距的腰沟,0.4～0.8米深的隔水沟, 深度也不大一致。三沟规格布局关系到排水效果和土地利用、工程大小,过密过深,土地利用率不高,增加土方量;过稀过浅,易造成田间积水,加大土壤中的入渗量,给作物造成不利因素。本文主要探讨在一定的气象和土壤条件下,确保适宜作物根系的水气比条件,有 Reclamation field drainage project in our province, there are 2.4 ~ 4.8 m spacing ditch, 20 ~ 40 m spacing of the ditch, 0.4 ~ 0.8 m deep ditch, the depth is not very consistent. The layout of the three ditches is related to the drainage effect and the land use, the size of the project, too dense and too deep, the land utilization rate is not high, increase the amount of earthwork; too dilute too shallow, easy to cause field water, increase soil infiltration, Disadvantageous to the crop. In this paper, under certain conditions of meteorology and soil to ensure appropriate crop water vapor than the conditions, there