<?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>1794-6190</journal-id>
<journal-title><![CDATA[Earth Sciences Research Journal]]></journal-title>
<abbrev-journal-title><![CDATA[Earth Sci. Res. J.]]></abbrev-journal-title>
<issn>1794-6190</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1794-61902023000200203</article-id>
<article-id pub-id-type="doi">10.15446/esrj.v27n2.106442</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Estimation of evaporation from the water surface using the norm operator]]></article-title>
<article-title xml:lang="es"><![CDATA[Estimación de la evaporación en una superficie de agua a través de la norma operacional]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Eriskin]]></surname>
<given-names><![CDATA[Hale]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Terzi]]></surname>
<given-names><![CDATA[Ozlem]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Isparta University of Applied Sciences  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Isparta University of Applied Sciences Technology Faculty ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Turkey</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<volume>27</volume>
<numero>2</numero>
<fpage>203</fpage>
<lpage>210</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1794-61902023000200203&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1794-61902023000200203&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1794-61902023000200203&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Due to the lack of precipitation in recent years, some regions of Turkey are in danger of drought. This situation in-creases the importance of planning water resources and makes it necessary to develop water budget calculations. One of the important steps in water budget calculations is the correct estimation of the amount of evaporation. For this reason, a different method has been developed for evaporation estimation and the applicability of this developed method has been tested with the meteorological parameters of Lake E&#287;irdir, one of most important freshwater resources of Turkey. E&#287;irdir Lake is located within the borders of Isparta province in the Mediterranean Region, Turkey. Firstly, evaporation estimation models were developed by artificial neural networks (ANN) method using 490 days of air temperature, water temperature, sunshine duration, and solar radiation parameters of Lake E&#287;irdir. After the meteorological parameters were transformed into a dimensionless form through normalization, the norm function was applied to these parameters as a part of the modeling process. The values obtained by the function are used as input parameters in the N-ANN method. In both cases, the pan evaporation values obtained with different network structures were compared and it was seen that the N-ANN models developed with the norm operator in general gave more appropriate results.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Debido a la falta de precipitación en años recientes en algunas regiones de Turquía hay un riesgo de sequía. Esta situación incrementa la importancia en la planeación relacionada con los recursos acuíferos y hace necesario desarrollar cálculos en el presupuesto del agua. Uno de los pasos importantes en el desarrollo de este presupuesto tiene que ver con la estimación correcta de la cantidad de evaporación. Por esta razón se ha desarrollado un método diferente para la estimación de la evaporación y la aplicación de este método ha sido evaluada con los parámetros meteorológicos del lago de E&#287;irdir, una de las fuentes de agua dulce más importante de Turquía. El lago de E&#287;irdir se ubica en la provincia de Isparta, en la región del Mediterráneo de Turquía. Inicialmente los modelos de estimación de evaporación se desarrollaron a través del método de redes neuronales artificiales (ANN, del inglés Artificial Neural Networks) a partir de los parámetros de temperatura del aire, temperatura del agua, duración del día y radiación solar medidos en 490 días en el lago de E&#287;irdir. Después de que estos parámetros se normalizaron se aplicó la norma operacional como parte del proceso de modelado. Los valores obtenidos por la función se usaron como los parámetros de configuración en el método N-ANN. En ambos casos, se compararon los valores obtenidos con el tanque evaporimétrico en varias estructuras de redes y se pudo analizar que los modelos N-ANN de la norma operacional ofrecieron mejores resultados en general.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[pan evaporation]]></kwd>
<kwd lng="en"><![CDATA[norm operator]]></kwd>
<kwd lng="en"><![CDATA[ANN]]></kwd>
<kwd lng="en"><![CDATA[LakeE&#287;irdir Turkey]]></kwd>
<kwd lng="es"><![CDATA[tanque evaporimétrico]]></kwd>
<kwd lng="es"><![CDATA[norma operacional]]></kwd>
<kwd lng="es"><![CDATA[redes neuronales artificiales]]></kwd>
<kwd lng="es"><![CDATA[lago de E&#287;irdir, Turquía]]></kwd>
</kwd-group>
</article-meta>
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