在农田灌溉中,为了减少输水渗漏损失,近几年来,我省井灌区修建了不少混凝土输水垄沟,据统计,到1984年底,全省拥有总长度1178万米。估计每年可减少渗漏水量超过1亿立方米,防渗效果明显。可是,有的地方只建轻管,结果前边建后边坏,花费不小,受益不大。要想发挥工程应有的效益,要建好,还必须用好管好。 In farmland irrigation, in order to reduce water seepage loss, in recent years, a lot of concrete drainage ditches have been constructed in our well irrigation district. According to statistics, by the end of 1984, the province had a total length of 11.78 million meters. Estimated annual leakage can reduce the leakage of more than 100 million cubic meters, anti-seepage effect is obvious. However, some places only built light tubes, resulting in the front built behind the bad, cost is not small, little benefit. If we want to give full play to the benefits of the project, we must make good use of it.