<?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>1794-6190</journal-id>
<journal-title><![CDATA[Earth Sciences Research Journal]]></journal-title>
<abbrev-journal-title><![CDATA[Earth Sci. Res. J.]]></abbrev-journal-title>
<issn>1794-6190</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1794-61902019000400293</article-id>
<article-id pub-id-type="doi">10.15446/esrj.v23n4.71706</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Soil erosion risk zoning in the Ecuadorian coastal region using geo-technological tools]]></article-title>
<article-title xml:lang="es"><![CDATA[Zonificación de riesgo erosivo en la costa ecuatoriana usando herramientas geotecnológicas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pacheco]]></surname>
<given-names><![CDATA[Henry Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez]]></surname>
<given-names><![CDATA[Williams]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moro]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Técnica de Manabí  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>23</volume>
<numero>4</numero>
<fpage>293</fpage>
<lpage>302</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1794-61902019000400293&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1794-61902019000400293&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1794-61902019000400293&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The activation of erosive processes on the slopes of the drainage catchments in the Ecuadorian coastal region represents a serious environmental problem that results in a loss of soil resource with the consequent reduction in agricultural productivity, increasing lack of areas with vegetation, and decreased water quality. These issues increase, among other things, the probability of flooding. The purpose of this research is to zone soil erosion risk in the Manabí province, which is located on the Ecuadorian coast. The methodology is supported by the employment of Geographic Information Technologies (GIT) in order to access and process information of interest, such as: precipitation data with which to calculate the R Factor of the Universal Soil Loss Equation (USLE); topography, which was employed to create a slope map from the Digital Elevation Model (DEM) ASTER; vegetation cover, by applying the Normalized Difference Vegetation Index (NDVI); land use, through the interpretation of orthophotos and a field survey; and infiltration capacity, obtained by considering the texture of the soil. The factors were combined by means a weighted relationship (map algebra) and exploiting the potential of software for the design of Geographic Information Systems (GIS). The results indicate the presence of soils with little or limited vegetal protection, in areas with steep slopes, moderate rainfall and extensive farming activities. These characteristics determine conditions of high soil erodibility, and propitiate the triggering of erosive processes. Indeed about 19% of the surface of the Manabí province classifies with soil erosion risk between high and very high. These areas should be prioritized by regional government agencies to implement soil restoration and protection policies. Surfaces with medium soil erosion risk represent 67% of the territory, which are also areas that require certain levels of attention. The surfaces with low soil erosion risk represent only 14% of the province, corresponding to areas of low slope.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La activación de fuertes procesos erosivos en las vertientes de las cuencas hidrográficas de la provincia de Manabí, representa una seria problemática ambiental que se traduce en la pérdida del valiosísimo recurso suelo, con la consecuente disminución en el rendimiento de la productividad agrícola, el incremento de áreas desprovistas de vegetación, la disminución de la calidad del agua, la intensificación de las inundaciones, entre otras cosas. El objetivo de ésta investigación consiste en zonificar el riesgo erosivo en la provincia de Manabí; para ello se hace uso de las Tecnologías de la Información Geográfica en el acceso y procesamiento de información de interés como es el caso de las precipitaciones con el cálculo del Factor R de la USLE, topografía, elaborando un mapa de pendientes a partir del MDE ASTER, cobertura vegetal, usando el Índice Normalizado de Diferencia de Vegetación (INDV), uso del suelo, a través de interpretación de ortofotos y levantamiento de campo, y capacidad de infiltración, considerando la textura del suelo. La combinación de los factores se realizó a través de una relación ponderada, aprovechando las potencialidades de softwares para trabajo en ambiente GIS, específicamente las relacionadas con el álgebra de mapas. Los resultados indican la presencia de suelos con escasa o nula protección vegetal, en áreas de pendientes elevadas, pluviosidad considerable y actividades agropecuarias extensivas, lo cual condiciona la fuerte acción de los procesos erosivos, con las consecuencias de bajo rendimiento en la producción agropecuaria, azolve y contaminación de los cuerpos de agua con la consecuente disminución de la calidad de vida en la población, evidenciando la necesidad de implementar políticas, estrategias y acciones, por parte de los Gobiernos Autónomos Descentralizados, orientadas a impulsar el fortalecimiento de capacidades institucionales y comunitarias que promuevan la sostenibilidad ambiental.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Manabí province]]></kwd>
<kwd lng="en"><![CDATA[GIT]]></kwd>
<kwd lng="en"><![CDATA[soil erosion risk]]></kwd>
<kwd lng="es"><![CDATA[Erosión]]></kwd>
<kwd lng="es"><![CDATA[MDT]]></kwd>
<kwd lng="es"><![CDATA[NDVI]]></kwd>
<kwd lng="es"><![CDATA[USLE]]></kwd>
<kwd lng="es"><![CDATA[NDVI]]></kwd>
<kwd lng="es"><![CDATA[imágenes de satélite]]></kwd>
</kwd-group>
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