1·Most of these operations draw irrigation water from local rivers or lakes.
这些运行大多要从当地河湖里抽取灌溉水。
2·Often the cheapest way to provide irrigation water in the dry tropics is through small-scale projects, such as gathering rainfall in depressions and pumping it to nearby cropland.
在干旱的热带地区，提供灌溉水的最低成本的方法通常是建造小规模的工程。例如，在洼地收集雨水，然后将其抽调至附近的农田。
3·The pollutions were related to soil, fertilizer, irrigation water and air.
污染和土壤、肥料、灌溉水及空气有关。
4·The utilization coefficient of irrigation water contains the utilization coefficient of canal system water and field water.
灌溉水利用系数包括渠系水利用系数和田间水利用系数。
5·The order of water use efficiency and irrigation water use efficiency was both as follows: SM> ZM> SC.
水分利用效率和灌溉水利用效率均为稻草覆盖旱作>裸地旱作>常规水作。