<?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>1680-0338</journal-id>
<journal-title><![CDATA[Ingeniería Hidráulica y Ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[riha]]></abbrev-journal-title>
<issn>1680-0338</issn>
<publisher>
<publisher-name><![CDATA[Centro de Investigaciones Hidráulicas (CIH). Facultad de Ingeniería Civil. Universidad Tecnológica de La Habana "José A. Hecheverría" CUJAE]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1680-03382019000300126</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Determinación de la carga de diseño en los proyectos hidroenergéticos a pie de presa]]></article-title>
<article-title xml:lang="en"><![CDATA[Determination of the design head in hydropower storage projects]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez Urdaneta]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peña Pupo]]></surname>
<given-names><![CDATA[Leonardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hidalgo González]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,CUBACONS  ]]></institution>
<addr-line><![CDATA[San Miguel del Padrón La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Empresa de Hidroenergía UEB Santiago de Cuba ]]></institution>
<addr-line><![CDATA[ Santiago de Cuba]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Empresa de Hidroenergía  ]]></institution>
<addr-line><![CDATA[San Miguel del Padrón La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>40</volume>
<numero>3</numero>
<fpage>126</fpage>
<lpage>140</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1680-03382019000300126&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1680-03382019000300126&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1680-03382019000300126&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En Cuba, la carga de diseño preliminar para los proyectos hidroenergéticos &#8220;a pie de presa&#8221; se determina como el promedio ponderado por el tiempo de las cargas netas obtenidas en la simulación del embalse. En este trabajo se proponen tres métodos alternativos para la determinación de la carga de diseño preliminar óptima en centrales hidroeléctricas &#8220;a pie de presa&#8221; a saber: 1- mediante la utilización de la carga neta de acuerdo al histograma de frecuencia, 2- a partir de la curva de duración de la carga neta y 3- por el método del gradiente reducido generalizado. Cualquiera de estos tres métodos brinda mayor precisión en la determinación de este parámetro.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The preliminary design head for run-of reservoir hydropower projects in Cuba is determined as the time-weighted average of net head obtained through reservoir simulation. This paper proposes three alternative methods for obtaining the optimal preliminary design head as follows: 1- by the frequency histogram of the net head, 2- by the net head duration curve and 3- by the generalized reduced gradient method (non-linear programming). Any of these three methods offers a better approximation to this parameter.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[carga de diseño]]></kwd>
<kwd lng="es"><![CDATA[curva de duración de la carga neta]]></kwd>
<kwd lng="es"><![CDATA[optimización de proyectos hidroenergéticos]]></kwd>
<kwd lng="es"><![CDATA[sitios de baja carga]]></kwd>
<kwd lng="en"><![CDATA[design head]]></kwd>
<kwd lng="en"><![CDATA[net load duration curve]]></kwd>
<kwd lng="en"><![CDATA[hydropower project optimization]]></kwd>
<kwd lng="en"><![CDATA[low load sites]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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