Saludos. I'm trying to understand what exactly "entubar un canal" means in English. There's a canal that is very poorly maintained. More and more water flows through it every year, raising the banks, and the government just piles more and more dirt along the banks, so that the canal's water level is actually higher than the land around it. The people who live near the canal are demanding that the government "entubar el canal." What does that mean, exactly? Thanks.