<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2215-2563</journal-id>
<journal-title><![CDATA[Revista Geográfica de América Central]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Geog. Amer. Central]]></abbrev-journal-title>
<issn>2215-2563</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-25632021000100313</article-id>
<article-id pub-id-type="doi">10.15359/rgac.66-1.12</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Geología, geomorfología y ocurrencia de deslizamientos en la cuenca alta del Río Virilla, Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Geology, geomorphology and landslide occurrence in the upper Virilla River basin, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sequeira-Arguedas]]></surname>
<given-names><![CDATA[José María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Escuela Centroamericana de Geología ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<numero>66</numero>
<fpage>313</fpage>
<lpage>339</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-25632021000100313&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-25632021000100313&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-25632021000100313&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen 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.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract 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&#8217;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.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Deslizamientos]]></kwd>
<kwd lng="es"><![CDATA[suelos volcánicos]]></kwd>
<kwd lng="es"><![CDATA[arrastre de bloques]]></kwd>
<kwd lng="es"><![CDATA[amenaza sísmica]]></kwd>
<kwd lng="es"><![CDATA[geomorfología.]]></kwd>
<kwd lng="en"><![CDATA[Landslides]]></kwd>
<kwd lng="en"><![CDATA[Volcanic soils]]></kwd>
<kwd lng="en"><![CDATA[Boulder drag]]></kwd>
<kwd lng="en"><![CDATA[Seismic hazard]]></kwd>
<kwd lng="en"><![CDATA[Geomorphology.]]></kwd>
</kwd-group>
</article-meta>
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