Jawa South Dam & Reservoir System (Wadi Rajil South Extension)
Jawa Southern Reservoir · Wadi Rajil South Dam · Jawa EB I South Wing
EB I (Proto-urban Chalco–EB transition)·Jawa proto-urban Black Desert (Chalcolithic-EB)·🇯🇴 Mafraq Governorate, Black Desert, Jawa 12 km E of Safawi, Wadi Rajil south channel, Jordan
About
About Jawa South Dam & Reservoir System (Wadi Rajil South Extension)
Early Bronze Age (EB I, 3300 BCE) southern wing of the Jawa dam–reservoir complex on Wadi Rajil, Black Desert, 12 km east of Safawi, Mafraq Governorate. 5 km diversion canal to north reservoir. Dated by Helms (1981) to EB I (3300 BCE) via ceramics + C14 — world's oldest dam system contention with Jawa north vs Sadd el-Kafara. Built by Jawa's 2,000-pop proto-urban community to capture spring Rajil flood over basalt impermeable catchment, with settling tank silt trap.
System failed c. 2 ka arid event causing Jawa abandonment. Contentious world's-oldest-dam claim with Sadd el-Kafara Egypt.
Why it mattersSouthern wing proves Jawa is dual-dam system (not single); world's-oldest dual-dam redundancy.
Open questions
Mysteries & theories
Mysteries
- 01South vs North chronology contemporaneity
Theories
- 015.2 ka arid failure cause
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.3300 BCE
- Period
- EB I (Proto-urban Chalco–EB transition)
- Culture
- Jawa proto-urban Black Desert (Chalcolithic-EB)
- Builders
- Jawa community 2,000 (Helms)
- Purpose
- Secondary flood capture for Jawa town water supply + silt settling for north dam system reliability
- Abandoned
- c.3000 BCE (abandoned in 5.2 ka event)
- Rediscovered
- 1931 Glueck; 1972 Helms Jawa; 2018 water engineering re-study
- Excavation
- Excavated
1972
Helms surveys Jawa 10 ha + two dams (N 80 m + S 52 m)
1981
Helms EB I C14 3300 BCE — world's oldest contention
2000
Arid event 5.2 ka failure hypothesis for Jawa abandonment
On the ground
Structures & features
32.3320° N · 37.0280° E · 850 m · 2 mapped features
Jawa South Dam Curvilinear (52 m)
dam52-m curvilinear basalt dam on Rajil south channel 4 m high
32.3320° N · 37.0280° EJawa South Reservoir Settling Tank
reservoir120×35-m 2,000 m³ reservoir with 1.5-km canal to north system
32.3300° N · 37.0250° E
Gallery