| gptkbp:instanceOf | gptkb:Ancient_technology gptkb:Irrigation_system
 
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                                | gptkbp:alternativeName | gptkb:Falaj gptkb:Foggaras
 gptkb:Karez
 
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                                | gptkbp:component | Outlet Mother well
 Vertical shafts
 Underground tunnel
 
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                                | gptkbp:culturalSignificance | Symbol of Persian ingenuity 
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                                | gptkbp:date | 1st millennium BCE 
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                                | gptkbp:enables | Agriculture in arid regions 
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                                | gptkbp:environmentalImpact | Sustainable water management 
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                                | gptkbp:influenced | Roman aqueducts Spanish water systems
 
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                                | gptkbp:maintenance | Periodic cleaning 
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                                | gptkbp:method | Gravity flow Underground channel
 
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                                | gptkbp:notableExample | gptkb:Gonabad_Qanat gptkb:Zarch_Qanat
 
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                                | gptkbp:originatedIn | gptkb:Persia 
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                                | gptkbp:powerSource | Gravity 
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                                | gptkbp:purpose | Irrigation Water supply
 
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                                | gptkbp:riskFactor | Collapse of tunnels Depletion due to overuse
 
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                                | gptkbp:UNESCOStatus | World Heritage (Iranian Qanats) 
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                                | gptkbp:usedIn | gptkb:Afghanistan gptkb:Arabian_Peninsula
 gptkb:China
 gptkb:Iran
 gptkb:North_Africa
 gptkb:Oman
 gptkb:Pakistan
 
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                                | gptkbp:bfsParent | gptkb:Ancient_Iran 
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                                | gptkbp:bfsLayer | 7 
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                                | https://www.w3.org/2000/01/rdf-schema#label | Qanat irrigation system 
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