Ayn Zubaydah West Branch Aqueduct (Makkah West Zubaydah Canal)
Zubaydah West Branch · Makkah Gharb Zubaydah
Abbasid Early Islamic 801–842 CE (Makkah Hajj hydraulic)·Abbasid Makkah Hajj oasis (Zubaydah patron)·🇸🇦 Makkah Region, Wadi Na'man West, Ayn Zubaydah West Branch 32 km east of Makkah to Wadi Fatima convergence, Saudi Arabia
About
About Ayn Zubaydah West Branch Aqueduct (Makkah West Zubaydah Canal)
Western distributary branch (420 m) of 9th c Abbasid Ayn Zubaydah aqueduct complex dissecting off main Zubaydah canal 32 km east of Makkah at Wadi Na'man bifurcation, heading west-northwest to Wadi Fatima confluence. 6‰ over basalt ridge 420 m. Feeds western Makkah Zaydi farms 14 ha before merger with Wadi Fatima system. Dated 801 CE Zubaydah bint Ja'far with 842 Abbasid reconstruction (Mu'tasim) at vault. 2 km branch with 14 siphon inverted sections.
Threatened by Makkah–Taif highway cut through vault 2.
Why it mattersOnly documented western distributary of Hajj aqueduct showing Abbasid branching hydraulics 801/842 vaulted+siphon system.
Open questions
Mysteries & theories
Mysteries
- 01Why 14 siphons on 4.2 km — ridge frequency
Theories
- 01West branch as Zaydi farm patronage vs Hajj main to Mina
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- c.801 CE (Zubaydah) + 842 CE (Mu'tasim) reconstruction vault
- Period
- Abbasid Early Islamic 801–842 CE (Makkah Hajj hydraulic)
- Culture
- Abbasid Makkah Hajj oasis (Zubaydah patron)
- Builders
- Zubaydah bint Ja'far Abbasid aqueduct engineers + Mu'tasim 842 vault
- Purpose
- Makkah west distributary 4.2 km 0.9×0.7 m 14 siphons vaulted to 14 ha Zaydi farms and Wadi Fatima merger — Hajj secondary branch
- Abandoned
- c.1900 CE (Ottoman wells)
- Rediscovered
- 2020 Makkah Zubaydah GIS west branch 4.2 km mapping
- Excavation
- Partially excavated
801 CE
Zubaydah 801 main + west branch 4.2 km 0.9×0.7 m
842 CE
Mu'tasim vaulted 12 m repair 14 siphons
2020
Makkah GIS maps west branch 14 siphons vaulted
On the ground
Structures & features
21.3800° N · 39.9500° E · 420 m · 2 mapped features
Vaulted Basalt Ridge Tunnel (12 m)
aqueduct12-m vaulted tunnel preserving 0.6‰ grade over basalt ridge — Mu'tasim 842
21.3810° N · 39.9510° EInverted Siphon Section (Basalt)
structureBasalt inverted siphon one of 14 on branch — pressure segment
21.3820° N · 39.9520° E