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A sakia, alternative spelling sakieh or saqiya (from (アラビア語:ساقية), ''sāqīya''), also called Persian wheel, tablia, Rahat and in Latin tympanum〔(Water lifting devices book description )〕 is a mechanical water lifting device which uses buckets, jars, or scoops fastened either directly to a vertical wheel, or to an endless belt activated by such a wheel. The vertical wheel is itself attached by a drive shaft to a horizontal wheel, which is traditionally set in motion by animal power (oxen, donkeys, etc.) Because it is not using the power of flowing water, the sakia is different from a noria and any other type of water-wheel. It is still used in India, Egypt and other parts of the Middle East, and in the Iberian Peninsula and the Balearic Islands. It may have been invented in Hellenistic Egypt, Persia or India. The sakia was mainly used for irrigation, but not exclusively, as the example of Qusayr Amra shows, where it was used at least in part to provide water for a royal bathhouse.〔whc.unesco.org/document/127108〕 ==Description; performance== ::- With buckets directly on the wheel - The sakia is a large hollow wheel, traditionally made of wood. One type has its clay pots or buckets attached directly to the periphery of the wheel, which limits the depth it can scoop water from to less than half its diametre. The modern version is normally made of galvanized sheet steel and consists of a series of scoops. The modern type dispenses the water near the hub rather than from the top, the opposite of the traditional types. It is a method of irrigation frequently met within various parts of the Indian subcontinent. Sakia wheels range in diameter from two to five metres. Though traditionally driven by draught animals, they are now increasingly attached to an engine. While animal-driven sakias can rotate at 2–4 rpm, motorised ones can make as much as 8–15 rpm. The improved modern versions are also known as zawaffa and jhallan. ::- With buckets attached to endless belt - The historical Middle-Eastern device known in Arabic as ''saqiya'' usually had its buckets attached to a double chain, creating a so-called "pot garland". This allowed scooping water out of a much deeper well. An animal-driven sakia can raise water from 10-20 metres depth, and is thus considerably more efficient than a swape or ''shadoof'', as it is known in Arabic, which can only pump water from 3 metres. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sakia」の詳細全文を読む スポンサード リンク
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