Kallanai Grand Anicut East Channel
கல்லணை கிழக்கு கால்வாய் · East Channel Grand Anicut · Kallanai East
Early Historic to Medieval·Early Chola, Medieval Chola, Vijayanagara·🇮🇳 Tamil Nadu, Thanjavur District, Budalur Taluk, Kaveri River, east of main Kallanai body, India
About
About Kallanai Grand Anicut East Channel
East distributary channel 800 m east of the 329-m Kallanai (Grand Anicut) main dam (c.100 CE Karikala Chola), controlling the Vennar–Vettar eastward offtakes that watered the Chola delta's richest rice zone. The 180-m east channel regulator with 9 sluices (granite lintel, later Chola 11th c. and Vijayanagara 15th c. repairs) diverted Kaveri flood into the Kollidam-avoidance east delta, preserving the main anicut's flow division proven by Srinivasan 1968 stratigraphy distinguishing Chola core from medieval refacing. Still operational; APWWS survey 2011 documented 1.2-m Chola granite base course.
Why it mattersEastern wing of world's oldest operational anicut, vital for Chola delta east irrigation and Chola→Vijayanagara continuity.
Open questions
Mysteries & theories
Mysteries
- 01Stratigraphy of Chola vs medieval refacing
- 02Original 9 vs later 15 sluice debate
Theories
- 01Chola state formation through delta hydraulics
- 02British colonial water management reuse
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.100 CE with 11th c. and 15th c. refacing (Early Chola to Vijayanagara)
- Period
- Early Historic to Medieval
- Culture
- Early Chola, Medieval Chola, Vijayanagara
- Builders
- Karikala Chola and successors (Chola hydraulicians)
- Purpose
- Delta irrigation divisor — east Kaveri branch feeder to Thanjavur rice plain
- Rediscovered
- 100 CE Karikala core; 11th c. Rajaraja refacing inscriptions; 15th c. Vijayanagara repairs; 1804 British survey
- Excavation
- Excavation ongoing
c.100 CE
Karikala Chola construction of main dam
c.1030 CE
Rajaraja east channel inscription and refacing
1804
British Cauvery delta survey records east channel
On the ground
Structures & features
10.8350° N · 78.8250° E · 72 m · 2 mapped features
East Channel — Nine-Sluice Regulator
hydraulic180-m granite regulator with nine corbelled sluice openings 1.4 m wide, Chola core course
10.8360° N · 78.8260° EEast Channel — Vijayanagara Refacing Inscription Stone
inscriptionGranite slab with 15th c. Vijayanagara Telugu inscription and lotus sluice lintel
10.8340° N · 78.8240° E
Gallery