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[[Image:OmoRiver.jpg|thumb|right|200px|The Omo River in Ethiopia, Africa. <br>Photo: [http://www.flickr.com/photos/neslab/6826784275/ Davide Comelli.]]]

Channels take water from a riverbed to a collector well in the riverbank. They are often screens (slotted or perforated pipes) that are inserted horizontally into a riverbed, but also infiltration galleries can be made from channels with graded gravel as long as sediments are not washed into the collector well. Where screens are used, the screen diameter tends to be larger than that used normally for jetted/driven wells.