<?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>S2007-24222018000100039</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2018-01-03</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Variaciones espacio-temporales y modelaje de la concentración de oxígeno disuelto en el lago de Chapala, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Spatial and temporal variations and modeling of dissolved oxygen concentration in Lake Chapala, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora-Orozco]]></surname>
<given-names><![CDATA[Celia de la]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Garnica]]></surname>
<given-names><![CDATA[José Germán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-López]]></surname>
<given-names><![CDATA[Hugo Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rubio-Arias]]></surname>
<given-names><![CDATA[Héctor Osbaldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez-Durán]]></surname>
<given-names><![CDATA[Álvaro Agustín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ochoa-Rivero]]></surname>
<given-names><![CDATA[Jesús Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Velasco]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Tepatitlán de Morelos ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Tepatitlán de Morelos ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Tepatitlán de Morelos ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Chihuahua  ]]></institution>
<addr-line><![CDATA[ Chihuahua]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Tepatitlán de Morelos ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Tepatitlán de Morelos ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Universidad de Guadalajara  ]]></institution>
<addr-line><![CDATA[Zapopan ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>1</numero>
<fpage>39</fpage>
<lpage>52</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222018000100039&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222018000100039&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222018000100039&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La disminución del oxígeno disuelto (OD) en ecosistemas acuáticos alrededor del mundo ha afectado su calidad. El objetivo fue estimar la variación espacio-temporal del OD en el agua del lago de Chapala, México. Fueron seleccionados 16 sitios (n = 16) y en cada uno se cuantificó la concentración de OD in situ a cinco profundidades; en la superficie, y a 1, 2, 3 y 4 m. Las fechas de cuantificación fueron en septiembre, octubre, diciembre, febrero y junio (1996-1997). La información se analizó con la técnica geoestadística de Kriging ordinario, cuyo primer resultado son los variogramas. Los resultados indicaron que en diciembre, febrero y junio los niveles de OD fueron superiores a 5 mg l-1; mientras que en octubre, en la parte sureste del lago, se observaron concentraciones inferiores a 3 mg l-1. Los resultados mostraron que fue posible modelar la variación espacio-temporal de OD tanto a lo largo del lago de Chapala como a diferentes profundidades. Sin embargo, se observó que en algunos casos los variogramas presentaron una tendencia espacial a nivel global, por lo que, en futuros trabajos, se sugiere modelar con base en Kriging universal o utilizando otros modeles de interpolación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In several areas of the world, the decrease in dissolved oxygen (DO) in the lakes has affected negatively their quality. In Mexico, the Chapala Lake is the most important water body, since it has a transcendental role in the productive development of the region. Nevertheless, is also one of the most polluted bodies of water, therefore, the monitoring of the water quality is an important issue for its management. However, time and cost, involved in a constant sampling, are some of the main limitations for such monitoring. Therefore, we used alternative methodologies based on geostatistical approaches. In this way, we studied the OD spatial-temporal continuity of OD, through interpolations defined with ordinary kriging. The results showed that it was possible to model the variation spatial-temporal of OD concentrations, both along the Lake of Chapala, as at different depths. However, in some cases, the variograms presented a spatial trend at a global level. Therefore, in future work, we suggest to modeling OD based on universal kriging.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[interpolación]]></kwd>
<kwd lng="es"><![CDATA[Kriging ordinario]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[geoestadística]]></kwd>
<kwd lng="es"><![CDATA[estimación estocástica]]></kwd>
<kwd lng="en"><![CDATA[Interpolation]]></kwd>
<kwd lng="en"><![CDATA[ordinary Kriging]]></kwd>
<kwd lng="en"><![CDATA[contamination]]></kwd>
<kwd lng="en"><![CDATA[geostatistics]]></kwd>
<kwd lng="en"><![CDATA[stochastic estimation]]></kwd>
</kwd-group>
</article-meta>
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<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dissolved oxygen stratification and response to thermal structure and long-term climate change in a large and deep subtropical reservoir (Lake Qiandaohu, China)]]></article-title>
<source><![CDATA[Water Research]]></source>
<year>2015</year>
<volume>75</volume>
<page-range>249-58</page-range></nlm-citation>
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</article>
