LiDAR Mapping Unveils Ancient Hydraulic Engineering in Hampi

The Archaeological Survey of India (ASI) has recently concluded a groundbreaking LiDAR (Light Detection and Ranging) survey of the Hampi-Vijayanagara region in Karnataka. This remote sensing technology has unveiled a hidden layer of the 15th-century capital, specifically focusing on sophisticated hydraulic engineering and residential complexes that were previously buried under centuries of soil and vegetation.

LiDAR technology works by emitting laser pulses from an aircraft and measuring the time it takes for the light to reflect back. This allows archaeologists to create high-resolution 3D maps of the ground surface, effectively "seeing through" forest cover and topsoil. In Hampi, this has revealed an intricate network of water channels, aqueducts, and tanks that formed the backbone of the empire’s urban infrastructure.

The findings underscore the advanced nature of the Vijayanagara Empire’s urban planning. The hydraulic system was not merely for aesthetic purposes but was a functional necessity to support a population estimated to be one of the largest in the medieval world. The survey identified how water was diverted from the Tungabhadra River and stored in various reservoirs to ensure year-round availability for both agricultural and domestic use. Furthermore, the mapping of residential areas provides new insights into the social stratification and spatial organization of the city.

This discovery is significant for several reasons. First, it shifts the focus from the well-known monumental temple architecture of Hampi to the secular and utilitarian aspects of the city. Second, it demonstrates the efficacy of non-invasive archaeological methods in preserving the integrity of World Heritage sites. For policymakers and urban planners, the ancient water management systems of Hampi offer timeless lessons in sustainable resource management and climate resilience.