我国幅员辽阔,河流纵横,水资源应该说是丰富的,但按人口平均计算又不甚丰富。随着四化建设的发展,需水要求将日益增长,对此不能不引起人们的极大关注。一、农业用水的预测;建国以来,灌溉面积已从解放前的 With its vast territory and vast rivers, our water resources should be said to be rich, but not very rich by the average population. With the development of the four modernizations, water requirements will increase day by day, which can not but cause great concern. First, the prediction of agricultural water; since the founding of the PRC, the irrigated area has been from before liberation