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Geohazards pp 33-42 | Cite as

Volcanic hazards in Colombia and Indonesia: lahars and related phenomena

  • H. Th. Verstappen
Part of the AGID Report Series book series (ARS)

Abstract

Volcanic mudflows or lahars are a major type of volcanic hazard: they travel at high velocity over large distances, thus often affecting densely populated rural areas and urban settlements on the lower slopes of volcanoes. The mechanisms of lahar development and their various types, such as “hot” lahars associated with pyroclastic flows, “cold” or rain-fed lahars, and lahars caused by emptying of crater lakes or melting of snow and ice covering top areas, are discussed. Subsequently problems of hazard zoning and monitoring/early warning are dealt with. Methods of controlling and/or diverting lahar flows and related engineering structures are assessed. Merapi and Kelud volcanoes, Indonesia, and Nevado del Ruiz volcano, Colombia, serve as examples.

Keywords

Pyroclastic Flow Crater Lake Hazard Zoning Volcanic Hazard Lahar Deposit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© G.J.H. McCall, D.J.C. Laming and S.C. Scott 1992

Authors and Affiliations

  • H. Th. Verstappen

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