uncontrolled canal

irrigation

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In Tigris-Euphrates river system: Agriculture and irrigation
…main river in all seasons; uncontrolled canals, taking water only when the river is in flood; and raised concrete flumes, usually requiring pumps. The principal canal systems are the following: a series of left-bank Euphrates canals between Al-Ramādī and Al-Musayyib, the most important being the Al-Musayyib Drainage Project; canals derived…
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