Possible Sangam-age irrigation structure exposed on Kollidam river in Tiruchi district
Villagers stumbled upon the brick and stone structures a few days ago, and ASI team inspects and says it probably belongs to the Early Historic period
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Context
The has identified potential Sangam-age (3rd-4th century CE) irrigation structures on the Kollidam river bed near Lalgudi, . The brick structures, featuring semi-circular walls and parallel channels, resemble ancient water management systems found elsewhere in the region, such as at . While provisional identification suggests an early historic origin, definitive dating requires systematic excavation and scientific analysis.
UPSC Perspectives
History & Culture
This discovery provides valuable insights into the advanced engineering and water management capabilities of the Sangam period, a crucial era in ancient Tamil history. The use of large, wedge-shaped bricks and the specific structural design—potentially a sluice or inlet/outlet channel—demonstrate a sophisticated understanding of hydrology and irrigation techniques. The location near the ancient (Grand Anicut), built by the Chola king Karikalan, further emphasizes the historical significance of the Cauvery delta region in developing complex water infrastructure. For UPSC Prelims, questions may focus on identifying key archaeological sites associated with the Sangam age, distinguishing architectural features like the brick sluices found at (Vanagiri), and understanding the broader context of agricultural practices and technological advancements during this period.
Science & Technology
The identification of these structures highlights the crucial role of archaeological methodology and scientific techniques in uncovering and interpreting historical artifacts. The 's preliminary assessment relied on visual inspection of the exposed masonry, noting structural characteristics like brick dimensions and the parallel wall formation indicative of an inlet channel. However, to definitively establish the age and function of the site, systematic excavation and scientific dating are necessary. This typically involves methods like , which measures the decay of carbon isotopes in organic remains, or thermoluminescence dating, which determines the time elapsed since a ceramic or brick object was last heated. Understanding these scientific tools is essential for UPSC Mains, particularly in the context of GS Paper 1 (Heritage and Culture) and GS Paper 3 (Science and Technology), as they demonstrate how modern science informs historical narrative and preservation efforts.