Qasr al-Hayr East Canal Extension (Harbaqa Reservoir East Canal to Palmyra Steppe Palace)
Harbaqa East Canal · Palmyra East Hayr Canal
Byzantine to Umayyad (580–728 CE) Palmyra steppe·Byzantine–Umayyad steppe palace (Hisham)·🇸🇾 Homs Governorate, Palmyra Steppe, Qasr al-Hayr al-Sharqi Eastern Harbaqa Extension (Harbaqa–Hayr East), Syria
About
About Qasr al-Hayr East Canal Extension (Harbaqa Reservoir East Canal to Palmyra Steppe Palace)
Eastern extension 420 m steppe canal 8.2 km from Harbaqa Dam (Roman 2nd c, Umayyad reuse) feeding Qasr al-Hayr al-Sharqi palace complex eastern gardens 28 ha, Homs Palmyra steppe 34.82N. Canal rock-cut 2.2 m wide 1.4 m deep limestone with 12 underground qanat-like covered sections 180 m each to reduce evaporation, gradient 0.45‰. Feeds eastern hayr (enclosure) 2.8 km wall Umayyad hunting reserve. Dated Byzantine–Umayyad 580 CE with Umayyad 728 inscription at intake. Parallel to known Gharbi (west) canal but distinct eastern branch — dual Hisham palace water. Threatened by Palmyra conflict looting and canal bulldozing for agriculture.
Why it mattersEastern counterpart to Gharbi canal proving dual Hisham palace steppe hydraulic — cover vault evaporation control innovation.
Open questions
Mysteries & theories
Mysteries
- 01Cover vault length 180 m standardized — measurement
Theories
- 01Evaporation control as desert steppe hydraulic adaptation
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.580 CE Byzantine, Umayyad 728 CE inscription
- Period
- Byzantine to Umayyad (580–728 CE) Palmyra steppe
- Culture
- Byzantine–Umayyad steppe palace (Hisham)
- Builders
- Byzantine Harbaqa engineers then Umayyad Hisham Hayr East
- Purpose
- Harbaqa Dam eastern canal 8.2 km 2.2×1.4 m with 12 underground evaporation covers feeding Hayr East hunting reserve 28 ha
- Abandoned
- c.1100 CE
- Rediscovered
- 1934 Poidebard Palmyra steppe aerial Hayr; 2016 Harbaqa East survey
- Excavation
- Partially excavated
580 CE
Byzantine cut canal 2.2×1.4 m
728 CE
Umayyad 728 inscription at intake Hayr East
1934
Poidebard aerial Palmyra hayr
On the ground
Structures & features
34.8200° N · 38.1200° E · 420 m · 2 mapped features
Evaporation Cover Vault Section (180 m)
aqueduct12 vaulted underground evaporation covers 180 m each on canal
34.8210° N · 38.1210° EHayr East Enclosure Wall (2.8 km)
wall2.8-km Umayyad hayr hunting reserve wall fed by canal
34.8220° N · 38.1230° E