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Angkor's Water Crisis: The Canal That Couldn't Save an Empire
Description
The Khmer Empire's collapse has long been blamed on drought, but new research reveals a more complex story: the canals and reservoirs that sustained Angkor also trapped it in a cycle of sediment, silt, and stagnation. This episode dives into the engineering paradox of the baray system — why the massive West Baray, built in the 11th century, gradually filled with sediment faster than it could be dredged, forcing Khmer engineers to dig higher and higher channels until the entire water network became unsustainable. We examine the 13th-century crisis when the Siem Reap River changed course, the role of monsoon variability, and how the very infrastructure that made Angkor a hydraulic wonder became its Achilles' heel. We also explore recent LiDAR data showing the extent of the canal network and the limits of pre-industrial hydraulics. No other episode has focused solely on the physical failure of the water system — this is the story of how Angkor's genius for water management turned against it.