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解放以来,汉江平原的堤防逐年加高培厚,一般高出地面8～10米,最高洪水位亦高出地面7～9米。由于水头差很大,加上堤基、堤质不好,每逢汛期,常出现管涌险象。汉江平原因各地水文地质条件的差异,可产生水平和垂直两类管涌。它们的发展趋势不同,汛期抢护和汛后整治方法也不一样。实践证明,若汛期抢护方法不当,将会扩大险情,甚至造成灾害;反之,则可化险为夷,转危为安。另外,根据防重于抢的原则,必须重视对管涌地段的检查
Since the liberation, the embankments of the Hanjiang Plain have been gradually raised and thickened year by year, generally 8 to 10 meters above the ground, and the highest flood level is also 7 to 9 meters above the ground. Due to the large head difference, coupled with dike, embankment is not good, every flood season, often appear Piping risk. Due to the different hydrogeological conditions in the Hanjiang Plain, horizontal and vertical pipe types can be produced. Their development trends are different, flood control and flood control methods are not the same. Practice has proved that if improper methods of flood arrest in the flood season will widen the danger and even cause disasters; on the contrary, they can turn a back and take turns at risk. In addition, according to the principle of prevention and control, we must attach importance to the inspection of Guan Yong lots