The phrase "water channels" refers to natural or man-made pathways for the flow of water. These channels can be found in various forms such as rivers, streams, irrigation canals or pipelines. They are essential for the transportation of water from its source to where it is needed, for agricultural or industrial purposes. Water channels also play a crucial role in the water cycle, as they facilitate the movement of water from land to oceans, and the distribution of water across different ecosystems.