Assessing geo-hydrological hazards with Remote sensing data in Antananarivo (Madagascar) historical center

A detailed geo-hydrological hazard mapping of Antananarivo's Upper Town, including the UNESCO-listed Royal Hill of Ambohimanga, reveals critical susceptibility to landslides and flooding during Madagascar's rainy season (November–May). The study combines field surveys, high-resolution satellite imagery (0.5 m Pleiades-1A), and digital terrain models (2–1 m resolution) within a GIS framework to create a comprehensive geodatabase. This tool enables precise risk assessment for the preservation of historical heritage, such as Ambohimanga's fortifications and the Rova royal palace complex, which face heightened threats from tropical storms and cyclones—highlighted by the 2015 event that displaced over 20,000 residents.

Ciampalini, A., Frodella, W., Spizzichino, D., Margottini, C., & Casagli, N. (2020). Assessing geo-hydrological hazards with Remote sensing data in Antananarivo (Madagascar) historical center. https://doi.org/10.5194/egusphere-egu2020-19773