Canals have many characteristics to deal with the issue of h2o supply. In situations, such as Suez Canal, the canal is open to the sea. Wherever the canal is not at sea stage, many methods are already adopted. Having h2o from existing rivers or springs was a choice occasionally, https://cristianuslhy.blogoscience.com/43577447/helping-the-others-realize-the-advantages-of-urso-fofo