Geology, geomorphology and landslide occurrence in the upper Virilla River basin, Costa Rica
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Universidad Nacional, Costa Rica
2021
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| Acceso en línea: | https://www.revistas.una.ac.cr/index.php/geografica/article/view/13676 |
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GEOGRAFIA13676 |
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GEOGRAFIA136762021-12-06T20:52:53Z Geology, geomorphology and landslide occurrence in the upper Virilla River basin, Costa Rica Geología, geomorfología y ocurrencia de deslizamientos en la cuenca alta del Río Virilla, Costa Rica Sequeira-Arguedas, José María Landslides Volcanic soils Boulder drag Seismic hazard Geomorphology Deslizamientos suelos volcánicos arrastre de bloques amenaza sísmica geomorfología The Cerro de Pico de Piedra (translated as Mount Pico de Piedra) is a collapsed volcanic structure of the Irazú Volcanic Group associated with Paraíso Member’s volcanism and constitutes part of the upper basin of the Virilla River. Data interpretation gathered by remote sensing, bibliographical compilation, geomorphological survey and field visits allowed the identification of intensive erosion processes, slope instability and hazard (damage) susceptibility of the La Holanda transport corridor (road) that connects milk- and tuber-producing farms with the town of San Isidro de Coronado. Landslide occurrence and transport corridor susceptibility were assessed according to modified Mora-Vahrson and probabilistic infinite slope analysis (PISA) methodologies by modeling various degrees of soil water saturation in volcanic soils under two conditional seismic scenarios referenced to the Patillos (1952) and Cinchona (2009) Costa Rican earthquakes. Integrated geological zoning of the upper basin suggests the need to preserve the current forest coverage, minimize erosion rates and maintain appropriate buffering allowance distances of anthropogenic activities from fluvial bodies. Current agricultural areas are located within the legally established regulated territorial zoning attributed as being the most stable in relation to their geomorphological conditions. El cerro Pico de Piedra constituye una estructura volcánica colapsada del Grupo volcánico Irazú, asociable con el vulcanismo del miembro Paraíso y conforma la cuenca alta del río Virilla. La interpretación por medio de sensores remotos, recopilación bibliográfica, levantamiento geomorfológico y visitas al campo permitieron identificar procesos erosivos intensos en la cuenca, inestabilidad de laderas y susceptibilidad del corredor vial La Holanda que comunica fincas productoras de leche y tubérculos con San Isidro de Coronado. La ocurrencia de deslizamientos y susceptibilidad se evaluó con el método Mora-Vahrson modificado y Probabilistic Infinite Slope Analysis (PISA), modelando diversos grados de saturación en los suelos volcánicos y diversos escenarios, entre ellos los de Patillos de 1952 y Cinchona en 2009. La zonificación geológica integrada en la cuenca sugiere conservar la cobertura forestal actual, controlar la erosión y respetar los retiros respecto a los cauces fluviales. Las áreas agropecuarias actuales son de uso conforme y las más estables en relación a su condición geomorfológica. Universidad Nacional, Costa Rica 2021-01-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Evaluado por pares application/pdf text/html application/epub+zip https://www.revistas.una.ac.cr/index.php/geografica/article/view/13676 10.15359/rgac.66-1.12 Geographical Journal of Central America; Vol. 1 No. 66 (2021): Revista Geográfica de América Central; 343 - 370 Revista Geográfica de América Central; Vol. 1 Núm. 66 (2021): Revista Geográfica de América Central; 343 - 370 Revista Geográfica da América Central; v. 1 n. 66 (2021): Revista Geográfica de América Central; 343 - 370 2215-2563 1011-484X spa https://www.revistas.una.ac.cr/index.php/geografica/article/view/13676/20510 https://www.revistas.una.ac.cr/index.php/geografica/article/view/13676/20511 https://www.revistas.una.ac.cr/index.php/geografica/article/view/13676/20514 Derechos de autor 2021 Jose María Sequeira Arguedas |
| institution |
Universidad Nacional de Costa Rica |
| collection |
Revista Geografía de América Central |
| language |
spa |
| format |
Online |
| author |
Sequeira-Arguedas, José María |
| spellingShingle |
Sequeira-Arguedas, José María Geology, geomorphology and landslide occurrence in the upper Virilla River basin, Costa Rica |
| author_facet |
Sequeira-Arguedas, José María |
| author_sort |
Sequeira-Arguedas, José María |
| title |
Geology, geomorphology and landslide occurrence in the upper Virilla River basin, Costa Rica |
| title_short |
Geology, geomorphology and landslide occurrence in the upper Virilla River basin, Costa Rica |
| title_full |
Geology, geomorphology and landslide occurrence in the upper Virilla River basin, Costa Rica |
| title_fullStr |
Geology, geomorphology and landslide occurrence in the upper Virilla River basin, Costa Rica |
| title_full_unstemmed |
Geology, geomorphology and landslide occurrence in the upper Virilla River basin, Costa Rica |
| title_sort |
geology, geomorphology and landslide occurrence in the upper virilla river basin, costa rica |
| title_alt |
Geología, geomorfología y ocurrencia de deslizamientos en la cuenca alta del Río Virilla, Costa Rica |
| publisher |
Universidad Nacional, Costa Rica |
| publishDate |
2021 |
| url |
https://www.revistas.una.ac.cr/index.php/geografica/article/view/13676 |
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