<?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>1659-4266</journal-id>
<journal-title><![CDATA[Cuadernos de Investigación UNED]]></journal-title>
<abbrev-journal-title><![CDATA[Cuadernos de Investigación UNED]]></abbrev-journal-title>
<issn>1659-4266</issn>
<publisher>
<publisher-name><![CDATA[Universidad Estatal a Distancia de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-42662019000200173</article-id>
<article-id pub-id-type="doi">10.22458/urj.v11i2.2084</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Calidad física y química de cuerpos de agua ribereños en la zona costera de Bahía Ballena y Puerto Cortés, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villegas-Arguedas]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ Heredia]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<volume>11</volume>
<numero>2</numero>
<fpage>173</fpage>
<lpage>181</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-42662019000200173&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-42662019000200173&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-42662019000200173&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción: varios factores físicos y biológicos afectan los sistemas acuáticos costeros. Objetivo: determinar las condiciones físico-químicas de cuatro cuerpos de aguas superficiales en Costa Rica. Métodos: en cada estación de monitoreo, el valor in situ de las variables físico-químicas del agua se determinó con un medidor portátil multiparamétrico Thermo Scientific. La turbidez (Secchi), el tipo de entorno y la corriente se categorizaron como variables "dummy". Resultados: tomé un total de 22 muestras. El oxígeno disuelto osciló entre 8,73mg/L en Ballena Creek y 12,88mg/L en el río Coronado; saturación de oxígeno desde 137,2% en el río Tortuga a 164,2% en el río Coronado. La temperatura del agua osciló entre 25,20°C en el arroyo Ballena y 34,10°C en el río Morete; salinidad de 0,10ppt en los cuatro sitios de muestreo a 0,20ppt en los ríos Morete y Coronado. El total de sólidos disueltos varió desde 64mg/L en el río Tortuga hasta 173mg/L en el río Coronado. El pH de 6,42 en Ballena Creek a 7,67 en el río Coronado. Conclusión: No hubo diferencias significativas entre estos ríos y arroyos: todos tienen una calidad de agua similar.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract &#8220;Physical and chemical quality of riparian water bodies in the coastal zone of the Ballena Bay and Cortés Port. Costa Rica&#8221;. Introduction: various physical and biological factors affect coastal aquatic systems. Objective: to determine the physico-chemical conditions of four surface water bodies in Costa Rica. Methods: at each monitoring station the in situ value of the physical-chemical variables of the water was determined with a Thermo Scientific multi-parameter portable meter. Turbidity (Secchi), type of environment and current were categorized as "dummy" variables. Results: I took a total of 22 samples. Dissolved oxygen ranged b etween 8,73mg/L in Ballena Creek and 12,88mg/L in Coronado River; oxygen saturation from 137,2% in Tortuga River to 164,2% in Coronado River. Water temperature ranged from 25,20°C in Ballena Stream and 34,10°C in the Morete River; salinity ranged from 0.10ppt in the four sampling sites to 0,20ppt in the Morete and Coronado rivers. Total dissolved solids ranged from 64mg/L in Tortuga River to 173mg/L in Coronado River. The pH from 6,42 in Ballena Creek to 7,67 in the Coronado River. Conclusion: There were no significant differences among these rivers and streams: they all have a similar water quality.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Water]]></kwd>
<kwd lng="en"><![CDATA[physical-chemical]]></kwd>
<kwd lng="en"><![CDATA[Ballena]]></kwd>
<kwd lng="en"><![CDATA[Cortés]]></kwd>
<kwd lng="en"><![CDATA[Costa Rica.]]></kwd>
<kwd lng="es"><![CDATA[Agua]]></kwd>
<kwd lng="es"><![CDATA[físico-química]]></kwd>
<kwd lng="es"><![CDATA[Ballena]]></kwd>
<kwd lng="es"><![CDATA[Cortés]]></kwd>
<kwd lng="es"><![CDATA[Costa Rica]]></kwd>
</kwd-group>
</article-meta>
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