Wild flooding is inefficient in use of water and labor, but it irrigates land that can't be managed by other methods of surface irrigation.

漫灌的用水效率和劳动效率都是很低的，但它能用来灌溉那些不能采用其他地面灌水方法灌溉的土地。

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Recognized administrative system in ancient Egypt is already exists, its jurisdiction from the Nile flooding caused by the year to build the pyramids irrigation affairs.

古埃及确认的行政系统已经存在，其从该年建造金字塔灌溉事务尼罗河洪水造成的管辖权。

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