<?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>S2007-24222019000200241</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2019-02-09</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cuantificación de la constante de desoxigenación por demanda bentónica del río Tercero (Ctalamochita), provincia de Córdoba, Argentina]]></article-title>
<article-title xml:lang="en"><![CDATA[Measurement of sediment oxygen demand rates for benthic demand of Tercero (Ctalamochita) River, Córdoba province, Argentina]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chalimond]]></surname>
<given-names><![CDATA[María Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferreyra]]></surname>
<given-names><![CDATA[Marina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cossavella]]></surname>
<given-names><![CDATA[Ana María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Secretaría de Recursos Hídricos y Coordinación  ]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Secretaría de Recursos Hídricos y Coordinación  ]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Córdoba Facultad de Ciencias Exactas Físicas y Naturales Facultad Regional Córdoba]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<volume>10</volume>
<numero>2</numero>
<fpage>241</fpage>
<lpage>259</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222019000200241&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222019000200241&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222019000200241&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La modelación del oxígeno disuelto de un río constituye una valiosa herramienta en la evaluación de su calidad. De allí la importancia de valorar los distintos procesos involucrados, entre ellos la demanda bentónica, es decir, el consumo de oxígeno de la columna de agua en la interfaz agua-sedimento. Considerando que no se dispone de ningún estudio experimental referido a este tema para el río Tercero (Ctalamochita), Córdoba, Argentina, este trabajo tiene como objetivo cuantificar a nivel de laboratorio su demanda bentónica en ocho sitios a lo largo de su cauce, a partir de muestras de sedimento tomadas en cinco campañas efectuadas entre junio de 2013 y junio de 2014, empleando respirómetros individuales. Teniendo en cuenta la variabilidad del oxígeno disuelto en función del tiempo, el volumen de agua confinada, la superficie del sedimento y las características de los respirómetros, se calculó la demanda bentónica, aplicando la ecuación utilizada por Nolan y Johnson (1979), propuesta por USEPA. La falta de antecedentes para el río en estudio imposibilitó comparar los resultados obtenidos; sin embargo, el intervalo de valores hallados a 20 °C estuvo comprendido entre 0.040 y 0.484 gO2/m2d, siendo similares a los reportados por USEPA para sedimentos minerales y arenosos de ríos (0.05-1.00 gO2/m2d). Los resultados obtenidos permiten comprender el comportamiento del sedimento béntico y su influencia en el oxígeno disuelto del cuerpo hídrico en estudio.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Modeling of dissolved oxygen technique in rivers is a valuable tool for assessing water quality. Hence, assessment of different processes is of great importance, like benthic demand, that is to say, oxygen consumption of the water column in the water-sediment interface. At the moment there are no previous studies related to this field for the Tercero (Ctalamochita) River (Córdoba, Argentina). This study aimed to measure the benthic demand of Tercero (Ctalamochita) River from sediment samples that were taken at eight sites in five campaigns during one year (June, 2013 to June, 2014), using individual respirometers. Taking into account the variation of the dissolved oxygen as regards time, water volume, sediment area and characteristics of respirometers, benthic demand was estimated using the equation of Nolan and Johnson, (1979) proposed by the USEPA. Since there is no previous data, it was impossible to compare the acquired results. However, the range values found at 20 °C was between 0.040 and 0.484 gO2/m2d, being similar to those reported by the USEPA for mineral and sandy river sediments (0.05-1.00 gO2/m2d). These results allow us to understand the behavior of benthic sediment and its influence on the dissolved oxygen.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Demanda bentónica]]></kwd>
<kwd lng="es"><![CDATA[respirómetros individuales]]></kwd>
<kwd lng="es"><![CDATA[oxígeno disuelto]]></kwd>
<kwd lng="es"><![CDATA[río Tercero (Ctalamochita)]]></kwd>
<kwd lng="en"><![CDATA[Sediment oxygen demand]]></kwd>
<kwd lng="en"><![CDATA[individual respirometers]]></kwd>
<kwd lng="en"><![CDATA[dissolved oxygen]]></kwd>
<kwd lng="en"><![CDATA[Tercero (Ctalamochita) River]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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