<?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>2007-2422</journal-id>
<journal-title><![CDATA[Tecnología y ciencias del agua]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnol. cienc. agua]]></abbrev-journal-title>
<issn>2007-2422</issn>
<publisher>
<publisher-name><![CDATA[Instituto Mexicano de Tecnología del Agua, Coordinación de Comunicación, Participación e Información]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-24222020000200309</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2020-02-09</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variación espacio-temporal de arsénico y flúor en el agua subterránea de la ciudad de Durango, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Cruz]]></surname>
<given-names><![CDATA[Diego Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alarcón-Herrera]]></surname>
<given-names><![CDATA[María Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reynoso-Cuevas]]></surname>
<given-names><![CDATA[Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Castañón]]></surname>
<given-names><![CDATA[Luis Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Consejo Nacional de Ciencia y Tecnología Centro de Investigación en Materiales Avanzados, Unidad Durango ]]></institution>
<addr-line><![CDATA[Durango ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigación en Materiales Avanzados, Unidad Durango  ]]></institution>
<addr-line><![CDATA[Durango ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Consejo Nacional de Ciencia y Tecnología Centro de Investigación en Materiales Avanzados, Unidad Durango ]]></institution>
<addr-line><![CDATA[Durango ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Centro de Investigación en Materiales Avanzados Unidad Durango ]]></institution>
<addr-line><![CDATA[Durango ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<volume>11</volume>
<numero>2</numero>
<fpage>309</fpage>
<lpage>340</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222020000200309&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222020000200309&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222020000200309&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En el presente estudio se determinó el comportamiento espacial y temporal de los niveles de arsénico (As) y flúor (F) en el agua subterránea de la ciudad de Durango, México. Para ello, se integró una base de datos, la cual fue analizada mediante pruebas estadísticas no paramétricas y representada a través de sistemas de información geográfica. La base de datos incluyó 455 mediciones de As y 473 de F, obtenidas a partir de resultados de monitoreos anuales de 2012 a 2016, en 97 pozos y siete tanques que abastecen de agua a la ciudad. El análisis de los resultados muestra que las concentraciones de As y F superan los valores de referencia de los límites máximos recomendados por la Organización Mundial de la Salud (OMS). El 88% de las determinaciones de As se encuentra en el rango de 20 a 35 &#956;g/l y el 84% de las mediciones de F están en el rango de 3 a 6 mg/l. El análisis del periodo 2012-2016 presenta globalmente un aumento de la concentración de As y una disminución estadísticamente significativa (p-valor &lt; 0.01) en las concentraciones de F. Las concentraciones mayores de As y F se presentaron en las zonas: noreste, sureste y noroeste de la ciudad. Mientras que la zona sureste presentó los valores más bajos de As y F. El estudio temporal y espacial sugiere que el tipo de depósitos aluviales y las rocas volcánicas del basamento como tobas y riolitas condicionan la presencia de altas concentraciones de As y F. Sin embargo, factores locales, como la extracción y evaporación, pueden influir en las variaciones interanuales espacio-temporal observadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In the present study, the spatial and temporal behavior of the levels of arsenic (As) and fluoride (F) in the groundwater of the city of Durango was determined. To do this, a database was integrated, which was analyzed by non-parametric statistical tests and represented by geographic information systems. The database included 455 measurements of As and 473 of F, obtained from annual monitoring results from 2012 to 2016, in 97 wells and 7 tanks that supply water to the city. The analysis of the results shows that the concentrations of As and F exceed the reference values of the maximum limits recommended by the World Health Organization (WHO). 88% of the As determinations are in the range of 20 to 35 &#956;g/l and 84% of the F measurements are in the range of 3 to 6 mg/l. The analysis of the period 2012-2016, presents an increase in the concentration of As and a statistically significant decrease (p-value &lt; 0.01) in the concentrations of F. The highest concentrations of As and F occurred in the areas: Northeast, southeast and northwest of the city. While the southeast area presented the lowest values of As and F. The temporal and spatial study suggests that the alluvial deposits and the volcanic rocks of the basement as tobas and riolites present in the areas with the highest concentrations of As and F condition the distribution of the levels of these elements in the groundwater. However, local factors such as extraction and evaporation, influence the observed inter annual spatial-temporal variations.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[variación espacio-temporal]]></kwd>
<kwd lng="es"><![CDATA[hidrogeoquímica]]></kwd>
<kwd lng="es"><![CDATA[arsénico]]></kwd>
<kwd lng="es"><![CDATA[flúor]]></kwd>
<kwd lng="es"><![CDATA[calidad del agua subterránea]]></kwd>
<kwd lng="en"><![CDATA[Spatial-temporal variation]]></kwd>
<kwd lng="en"><![CDATA[hydrogeochemical]]></kwd>
<kwd lng="en"><![CDATA[arsenic]]></kwd>
<kwd lng="en"><![CDATA[fluoride]]></kwd>
<kwd lng="en"><![CDATA[groundwater quality]]></kwd>
</kwd-group>
</article-meta>
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