<?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>S2007-24222018000400147</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2018-04-07</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Contraste por ETP del RDI en tres localidades climáticas de San Luis Potosí, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Comparison of RDI based on PET in three climatic locations in San Luis Potosi, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Campos-Aranda]]></surname>
<given-names><![CDATA[Daniel Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí  ]]></institution>
<addr-line><![CDATA[San Luis Potosí SLP]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>4</numero>
<fpage>147</fpage>
<lpage>183</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222018000400147&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222018000400147&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222018000400147&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las sequías meteorológicas son un fenómeno natural recurrente que origina una escasez de precipitación. La severidad de las sequías meteorológicas se estima a través de algoritmos establecidos, conocidos como índices de sequías. Uno de tales procedimientos, quizá el más simple, es el índice de reconocimiento de sequías o RDI (Reconnaissance Drought Index), que está basado en el cociente entre la precipitación y evapotranspiración potencial (ETP), ocurridas en un cierto lapso, seguido de meses. En este estudio se aplica el RDI en tres duraciones de sequía meteorológica, en cada una de las tres estaciones climatológicas seleccionadas de cada zona geográfica o climática del estado de San Luis Potosí, México, que fueron: Villa de Arriaga (Altiplano Potosino), Río Verde (Zona Media) y Xilitla (Región Huasteca). Los registros mensuales de precipitación y temperaturas media y mínima de cada estación abarcan más de 50 años. La ETP se estimó con cuatro métodos: 1) la fórmula de Penman-Monteith, que es el criterio de referencia; los criterios de 2) Thornthwaite; 3) Turc, y 4) Hargreaves-Samani. Los procedimientos operativos de estos criterios se exponen en los apéndices (ver más adelante). El análisis de los resultados indica que los RDI estimados con el método de Hargreaves-Samani es el que mejor reproduce los resultados de la fórmula de Penman-Monteith en las tres localidades climáticas procesadas. También el método de Turc conduce a resultados similares a los de referencia y por ello se puede establecer que el RDI es un índice de sequías robusto, que prácticamente no depende del método de estimación de la ETP. Al haber una diferencia notable en los procedimientos operativos de la fórmula de Penman-Monteith y del método de Hargreaves-Samani, este último es una solución práctica muy importante.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Meteorological droughts are a recurring natural phenomenon that causes lack of precipitation. The severity of meteorological droughts is estimated by established algorithms known as drought indices. One such procedure, perhaps the simplest, is the Reconnaissance Drought Index, or RDI, which is based on the ratio between precipitation and potential evapotranspiration (PET) for a determined continuous period of months. In this study, the RDI is applied to three durations of meteorological drought at a weather station selected from each of the three geographic or climate zones in the state of San Luis Potosi, Mexico, which are: Villa de Arriaga (Potosino Plateau), Río Verde (Mean Zone), and Xilitla (Huasteca Region). The monthly rainfall records and average and minimum temperatures of each station cover more than 50 years. PET was estimated by four methods: (1) the Penman-Monteith formula, which is the reference method, (2) the Thornthwaite, (3) the Turc, and (4) the Hargreaves-Samani. The operating procedures for these criteria are detailed in appendices. The analysis of the results indicates that the RDIs estimated with the Hargreaves-Samani method are best for reproducing the results of the Penman-Monteith formula, in the three climatic locations processed. The Turc method also led to results similar to those of the reference. Therefore, it can be said that the RDI is a robust drought index, which practically does not depend on the method of estimating the PET. There is a noticeable difference in the operational procedures of the Penman-Monteith formula and the Hargreaves-Samani method. The latter is a practical solution that is worth mentioning.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[sequías meteorológicas]]></kwd>
<kwd lng="es"><![CDATA[evapotranspiración potencial]]></kwd>
<kwd lng="es"><![CDATA[pruebas estadísticas]]></kwd>
<kwd lng="es"><![CDATA[error cuadrático medio]]></kwd>
<kwd lng="es"><![CDATA[error de sesgo medio]]></kwd>
<kwd lng="es"><![CDATA[tipos de sequías meteorológicas (ligeras,moderadas,severas y extremas)]]></kwd>
<kwd lng="en"><![CDATA[Meteorological droughts]]></kwd>
<kwd lng="en"><![CDATA[potential evapotranspiration]]></kwd>
<kwd lng="en"><![CDATA[statistical tests]]></kwd>
<kwd lng="en"><![CDATA[mean square error]]></kwd>
<kwd lng="en"><![CDATA[mean bias error]]></kwd>
<kwd lng="en"><![CDATA[types of meteorological drought (light,moderate,severe and extreme)]]></kwd>
</kwd-group>
</article-meta>
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