<?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>0256-7024</journal-id>
<journal-title><![CDATA[Revista Geológica de América Central]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Geol. Amér. Central]]></abbrev-journal-title>
<issn>0256-7024</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0256-70242024000200128</article-id>
<article-id pub-id-type="doi">10.15517/rgac.2024.62571</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Delimitación y caracterización de los abanicos aluviales en La Bajada de Aguas Zarcas, Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Delimitation and characterization of alluvial fans in the bajada of Aguas Zarcas, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora Chinchilla]]></surname>
<given-names><![CDATA[Rolando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica (UCR) Escuela Centroamericana de Geología (ECG) ]]></institution>
<addr-line><![CDATA[ San José]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<numero>71</numero>
<fpage>128</fpage>
<lpage>141</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0256-70242024000200128&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0256-70242024000200128&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0256-70242024000200128&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los abanicos aluviales son formaciones sedimentarias típicas de regiones montañosas, donde el flujo de agua cargado de sedimentos sale de cañones estrechos a zonas más amplias y de menor pendiente, depositando los sedimentos y formando estructuras en forma de abanico. Estos abanicos pueden variar en actividad, siendo algunos muy dinámicos con frecuentes inundaciones y otros más estables debido a la configuración geológica y los procesos tectónicos. En la Bajada de Aguas Zarcas, ubicada en el Distrito Aguas Zarcas, Cantón de San Carlos, Alajuela, Costa Rica, se identificaron varios abanicos aluviales coalescentes. Entre estos, el abanico del río Aguas Zarcas es el más extenso, seguido por otros como el paleo-río Aguas Zarcas, el río San Rafael, y el río Negritos, entre otros. La morfología de estos abanicos muestra que los sedimentos se acumulan y esparcen, creando formas del terreno características. La composición de los abanicos en Aguas Zarcas varía desde bloques de dimensiones centimétricas a métricas en las zonas proximales, hasta estratos arenosos y cenizas en las áreas distales. La identificación de las áreas activas e inactivas de estos abanicos es crucial para evaluar los riesgos de inundación. Las áreas activas son aquellas donde la deposición y erosión son posibles, y pueden ser más propensas a futuras inundaciones. El estudio incluyó la utilización de mapas geológicos y topográficos, así como inspecciones de campo para verificar la actividad de los abanicos. Se determinó que los abanicos aluviales en la Bajada de Aguas Zarcas han sido influenciados por procesos tectónicos y volcánicos, afectando la deposición y el flujo de los sedimentos. Este análisis proporciona una base para la gestión de riesgos y el desarrollo sostenible en áreas propensas a inundaciones, destacando la importancia de comprender la dinámica sedimentaria y geomorfológica de los abanicos aluviales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Alluvial fans are sedimentary forms typical of mountainous regions, where the flow of water loaded with sediments comes out of narrow canyons to wider and lower slope areas, depositing the sediments and forming fan-shaped structures. These fans can vary in activity, with some being very dynamic with frequent flooding and others more stable due to the geological configuration and tectonic processes. In the Bajada de Aguas Zarcas, located in the Aguas Zarcas District, Canton of San Carlos, Alajuela, Costa Rica, several coalescent alluvial fans were identified. Among these, the Aguas Zarcas River fan is the most extensive, followed by others such as the Aguas Zarcas paleo-river, the San Rafael River, and the Negritos River, among others. The morphology of these fans shows that sediments accumulate and spread, creating characteristic landforms. The composition of the fans in Aguas Zarcas varies from blocks of centimeter to metric dimensions in the proximal areas, to sandy strata and ash in the distal areas. Identification of active and inactive areas of these fans is crucial for assessing flood risk. Active areas are those where deposition and erosion are possible, and may be more prone to future flooding. The study included the use of geological and topographic maps, as well as field inspections to verify the activity of the fans. It was determined that the alluvial fans in the Bajada de Aguas Zarcas have been influenced by tectonic and volcanic processes, affecting the deposition and flow of sediments. This analysis provides a basis for risk management and sustainable development in flood-prone areas, highlighting the importance of understanding the sedimentary and geomorphological dynamics of alluvial fans.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[abanico aluvial]]></kwd>
<kwd lng="es"><![CDATA[amenaza de inundación]]></kwd>
<kwd lng="es"><![CDATA[geomorfología fluvial]]></kwd>
<kwd lng="es"><![CDATA[gestión del riesgo]]></kwd>
<kwd lng="es"><![CDATA[desarrollo sostenible]]></kwd>
<kwd lng="en"><![CDATA[alluvial fan]]></kwd>
<kwd lng="en"><![CDATA[flood hazard]]></kwd>
<kwd lng="en"><![CDATA[fluvial geomorphology]]></kwd>
<kwd lng="en"><![CDATA[risk management]]></kwd>
<kwd lng="en"><![CDATA[sustainable development]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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