Lasafam Iturrizaga
Abstract/Description
Glacial lake outbursts are among the most devastating natural hazards in the Hindu Kush-Karakoram region and have led to widespread destruction of settlements, particularly in historical times. The study presents a historical optical long-distance communication system for early warning of glacial lake outbursts, which was used until the end of the 1960s. The warning system consists of fire signal chains with warning posts at altitudes of over 4000 m a.s.l. and had a total transmission range of more than a hundred kilometers. The locations of selected fire signal chains were reconstructed in the field as e.g. for the Shimshal, Karambar and Rupal Valleys. Interviews with the local population, the analysis of historical travel reports and articles in international daily newspapers show that the fire warning system was widespread across the entire Hindu Kush-Karakoram including Ladakh. The beacon chains represented a community-based, cooperative early warning system that involved various ethnic language groups. Peripheral mountain societies, which were perceived as isolated communities due to the physical barriers of the high mountain relief and therefore in need of help in dealing with natural hazards, were already in earlier times in communication with each other through a fast optical communication system. In regard to the current risk of glacial lake outbursts in the region in combination with expanding settlement areas, large-scale infrastructure projects and the introduction of modern early warning systems controlled by external actors, the question of how to deal locally with natural hazards is of current relevance with regard to the conception of future sustainable strategies in natural hazard management.