<?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>2215-3896</journal-id>
<journal-title><![CDATA[Revista de Ciencias Ambientales]]></journal-title>
<abbrev-journal-title><![CDATA[Ciencias Ambientales]]></abbrev-journal-title>
<issn>2215-3896</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-38962022000100138</article-id>
<article-id pub-id-type="doi">10.15359/rca.56/1.7</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Calidad del agua para consumo humano y protección de la vida acuática en el embalse Los Laureles de Tegucigalpa (2002-2016)]]></article-title>
<article-title xml:lang="en"><![CDATA[Water quality for uses of human consumption and protection of the aquatic life in the Los Laureles reservoir of Tegucigalpa (2002-2016)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Cruz]]></surname>
<given-names><![CDATA[German Onil]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de Nicaragua (UNAN) Ciencias del Agua del Centro de Investigación para los Recursos Acuáticos (CIRA) ]]></institution>
<addr-line><![CDATA[Managua ]]></addr-line>
<country>Nicaragua</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>56</volume>
<numero>1</numero>
<fpage>138</fpage>
<lpage>156</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-38962022000100138&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-38962022000100138&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-38962022000100138&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  (Introducción):  Del embalse Los Laureles se genera una enorme cantidad de datos de calidad de agua que muchas veces no es analizada e interpretada de manera integral, deficiencia que se observa en otros embalses en el país y de la región centroamericana. Esto provoca un conocimiento limitado que impide tomar acciones preventivas ante escenarios de contaminación, cuando se observan o analizan los parámetros por separado.  (Objetivo):  El propósito de la investigación fue calcular e interpretar diferentes índices de calidad del agua en el embalse Los Laureles durante el periodo 2002-2016, con datos históricos y generados en este estudio para analizar los posibles factores naturales o antrópicos que han contribuido al deterioro de su calidad.  (Metodología):  Los índices se calcularon utilizando el software WQI versión 1.2 a partir de información histórica generada por el Laboratorio del SANAA en tres puntos de muestreo (cortina, centro y cola) e incluyendo hasta 23 parámetros fisicoquímicos, microbiológicos, metales y metaloides. Se utilizaron tres directrices de calidad: una para uso de consumo humano y dos para uso de protección de la vida acuática.  (Resultados):  Los índices de calidad categorizaron la calidad del agua del embalse Los Laureles para el uso consumo humano de marginal a pobre; mientras que para el uso protección de la vida acuática como regular. Se observó una disminución en los valores de los índices y en la categorización de la calidad del agua cuando se incluyeron más parámetros y muestreos.  (Conclusiones):  En el estudio integral se observó una disminución histórica de la calidad por el aumento en los valores de los parámetros que sobrepasaron las directrices hasta más de 25 veces, aún cuando solo se tratara de un parámetro que contribuyera a su disminución. Es decir, influyó más la cantidad de veces que un parámetro sobrepasó la norma que el número de parámetros fallidos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  (Introduction):  From the Los Laureles reservoir it is generated an enormous amount of water quality data that are often not analysed and interpreted in a comprehensive manner, a limitation that also occurs in other reservoirs in the country and over the Central American region. This situation limits the knowledge for taking preventive actions in the face of contamination scenarios when the parameters are observed or analysed separately.  (Objective):  The purpose of the research was to calculate and use different water quality indices in the Los Laureles reservoir during the time 2002-2016 with historical data, and analyse possible natural or anthropic factors that have contributed to its deterioration.  (Methodology):  The indices were calculated using WQI software (version 1.2), based on historical information generated by the SANAA Laboratory at three sampling points (curtain, centre and tail), and including up to 23 physicochemical, microbiological, metals and metalloids parameters. Three different guidelines were used: one guideline of water quality for human consumption use and two guidelines for water life protection use.  (Results):  The quality indices categorized the water quality of the Los Laureles reservoir for the use of human consumption as marginal to poor. The categorisation of use for aquatic life protection was regular. The decrease in the values of the indices and the categorization of water quality was observed when more parameters and samplings were included.  (Conclusion):  In the comprehensive study, a historical decrease in quality was recorded due to the increase in the values of the parameters that exceeded the guidelines up to more than 25 times, even when it is only a parameter that will contribute to its decrease. In other words, the number of times that a parameter exceeded the guidelines had more influence than the number of failed parameters.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[directrices]]></kwd>
<kwd lng="es"><![CDATA[índice WQI]]></kwd>
<kwd lng="es"><![CDATA[parámetros.]]></kwd>
<kwd lng="en"><![CDATA[Guidelines]]></kwd>
<kwd lng="en"><![CDATA[indices WQI]]></kwd>
<kwd lng="en"><![CDATA[parameters]]></kwd>
<kwd lng="en"><![CDATA[pollution]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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