Revista geológica de América central ISSN Impreso: 0256-7024 ISSN electrónico: 2215-261X

OAI: https://revistas.ucr.ac.cr/index.php/geologica/oai
Geomorphological and hydrological changes induced by the April 22, 1991 Limón, Costa Rica earthquake (Mw 7.7)
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Keywords

Limón Earthquake
External Geodynamics
Fluvial Geomorphology
Landslides
Slope Instability
Caribbean Slope
Terremoto de Limón
Geodinámica externa
Geomorfología fluvial
Inestabilidad de ladera
Deslizamientos
Vertiente Caribe

How to Cite

Barrantes, G., Vahrson, W. G., & Mora, S. (2021). Geomorphological and hydrological changes induced by the April 22, 1991 Limón, Costa Rica earthquake (Mw 7.7). Revista geológica De América Central, 65, 1–19. https://doi.org/10.15517/rgac.v0i65.46881

Abstract

The Limón Earthquake induced changes in external geodynamics processes such as: crustal uplift, soil liquefaction, land settlement and slope instability. This research focuses on the hydrological and geomorphological changes. The methodology followed starts from field observation, landslide mapping, concentration of solid materials, and comparative analysis of satellite images and aerial photographs. It was determined that around 140 km2 of vegetation cover were destroyed, which intensified surface runoff and soil erosion. Approximately 210 million m3 of solid materials were transported by fluvial systems. These processes affected the upper and middle basins first and then the alluvial fans at the foothills, with the accumulation of sediments and subsequently their removal downstream, which produced an accelerated progradation process between 1992 and 1998.

https://doi.org/10.15517/rgac.v0i65.46881
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Copyright (c) 2021 Gustavo Barrantes

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