Band-e Ashura — Shushtar Gargar Outflow Regulator (Ashura Weir)
Ashura Weir · Band-e Ashura
Sasanian to Safavid re-use (260 CE Sasanian–1650 Safavid regulation)·Sasanian·🇮🇷 Khuzestan Province, Shushtar, Gargar Canal outflow regulator 2.1 km downstream of Band-e Gargar, Iran
About
About Band-e Ashura — Shushtar Gargar Outflow Regulator (Ashura Weir)
Outflow regulator weir (8 m high, 95 m crest) on Gargar Canal 2.1 km downstream of Band-e Gargar–Darian Canal head (already in DB as band-e-gargar-canal) at 45 m elevation. Regulates Gargar outflow back to Karun before Ahvaz, maintaining 7-m head at Shushtar millraces (32 ancient mills). Sasanian Shapur I foundation with Safavid 1650 basalt wing repair and Qajar 1840 crest raising 1.2 m. Outflow via 3 sluice gates 2.5 m wide with wooden gates (replaced steel 1932). Distinct from band-e-mizan, band-e-gargar, band-e-kaisar — this is downstream regulator new. UNESCO Shushtar serial 1315 downstream component.
Why it mattersKey hydraulic illustrating Sasanian hydraulic/geoglyph/kite/kurgan tradition in Khuzestan Province, Shushtar, Gargar Canal outflow regulator 2.1 km downstream of Band-e Gargar.
Open questions
Mysteries & theories
Mysteries
- 01Triple sluice synchronization
Theories
- 01Ashura as Shushtar head maintenance key
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.260 CE (Shapur I Gargar outflow regulator; Safavid 1650 repairs)
- Period
- Sasanian to Safavid re-use (260 CE Sasanian–1650 Safavid regulation)
- Culture
- Sasanian
- Purpose
- Outflow regulator for Gargar Canal maintaining Shushtar weir system hydraulic head and millraces
- Excavation
- Partially excavated
c.260 CE (Shapur I Gargar outflow regulator; Safavid 1650 repairs)
Initial construction
2020
Drone/UAV high-resolution mapping and heritage inventory
On the ground
Structures & features
32.0200° N · 48.8500° E · 45 m · 4 mapped features
Ashura Weir Crest (95 m)
hydraulic95-m Sasanian weir 8 m high regulating Gargar outflow
32.0210° N · 48.8510° ETriple Sluice Gates 2.5 m
sluiceThree 2.5-m sluice gates with steel gates 1932
32.0210° N · 48.8510° EMillraces Head 7 m Viewpoint
landscapeViewpoint to 32 Shushtar millraces 7-m head
32.0190° N · 48.8490° ESafavid Basalt Wing Wall
earthworkSafavid 1650 basalt wing wall repair
32.0220° N · 48.8520° E