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修建灌溉排水渠道系统,是农田水利建设中最基本的项目之一。不论那种灌溉水源(如水库、堰壩、机电提水等),要能适时适量地将水输送到田间,满足农作物的需水要求,都必须通过渠道系统;在地势低洼的地方,要排除由于降雨所造成的迳流以及降低地下水位,保证良好的土壤水分状况,也必须通过排水沟渠系统来实现。因此灌溉排水渠道系统(以下简称灌排渠系)就成为发挥水利工程效益和保证农作物生育所需适宜水分条件的重要手段。本文拟就有关的几个问题提出初步意见,供研究参考。
The construction of irrigation and drainage channel system is one of the most basic items in farmland water conservancy construction. Irrespective of the kind of irrigation water source (such as reservoirs, barrage, mechanical and electrical water), to be able to timely and appropriate delivery of water to the field to meet the crop water requirements, must pass through the channel system; in the low-lying areas, to be excluded Drainage systems must also be used to ensure good soil moisture due to runoff from rainfall and lowering of groundwater tables. Therefore, irrigation and drainage system (hereinafter referred to as irrigation and drainage system) has become an important means to play an effective water conservancy project and to ensure appropriate crop conditions suitable for fertility. This article intends to put forward preliminary opinions on several issues for reference.