Monsoon Cartography and Communal Calibration: The Onam Harvest Calendar Embedded in Kerala’s Backwater Canals

季风制图与集体校准：喀拉拉邦回水运河中嵌入的欧南丰收历

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Kerala’s Onam festival synchronizes with monsoon-driven hydrological shifts mapped across 1,200 kilometers of interconnected backwater canals using pre-colonial tidal charts.
Houseboat captains navigate ceremonial processions using water-level markers carved into canal walls—each aligned with historic flood peaks verified by sediment core analysis.

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