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Basin irrigation is a method where land is surrounded by embankments to create a basin, which is then flooded with water. This technique was historically used in Egypt, utilizing the annual Nile flood to deposit rich silt onto fields, allowing for one crop per year. While effective, this method was dependent on flood levels and has largely been replaced by perennial irrigation systems that allow for controlled water application throughout the year. Irrigation, in general, is the artificial application of water to land to support agriculture, either by supplementing rainfall or making arid land usable.123

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