<?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>S2007-24222020000100085</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2020-01-03</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tendencia de la sequía meteorológica en el estado de Durango, México, por el método de Rodionov]]></article-title>
<article-title xml:lang="en"><![CDATA[Trend of meteorological drought in the state of Durango by the Rodionov method]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cortez-Villa]]></surname>
<given-names><![CDATA[Janeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quevedo-Nolasco]]></surname>
<given-names><![CDATA[Abel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arteaga-Ramírez]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrillo-Flores]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2020</year>
</pub-date>
<volume>11</volume>
<numero>1</numero>
<fpage>85</fpage>
<lpage>131</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222020000100085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222020000100085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222020000100085&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La sequía es el fenómeno natural que afecta a más personas en el mundo, hasta la última consecuencia, la muerte de plantas, animales y seres humanos. Para evaluar los posibles daños que causa, se desarrollaron índices de sequía que facilitan su análisis cuantitativo para realizar una planeación y manejo de los recursos hídricos. Sin embargo, actualmente se observan cambios en el sistema climático global que provocan condiciones de sequía de mayor intensidad, duración y frecuencia. Por lo que se realizó la detección de cambios con el método de Rodionov en los índices de sequía SPEI (Índice de Precipitación y Evapotranspiración Estandarizado) y SPI (Índice de Precipitación Estandarizada) a escalas de 6 y 12 meses en el estado de Durango, México. Se analizaron las tendencias de cambios en la media (RSI) y varianza (RSSI) de los índices en 49 estaciones del índice SPI de 6 meses y en 45 del índice SPEI de seis meses. Los valores RSI identificaron el comienzo de los periodos de sequía, la mayoría de los valores máximos de RSI se presentaron en julio de 1992. Las tendencias de la frecuencia de valores RSI, disminuyó durante el periodo 2000-2004 y aumentó durante 2005-2008. La década de mayores cambios en la media fue 1990-1999. La mayor frecuencia de valores RSSI fue en el periodo 1985-1989, los cambios se mantuvieron constantes durante los últimos 20 años. La década de mayores cambios en la varianza fue de 1980-1989.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Drought is the natural phenomenon that affects the most people in the world, until the last consequence, the death of plants, animals, and humans. To evaluate the possible damages it causes, drought indices were developed that facilitate its quantitative analysis to carry out planning and management of water resources. However, there are currently changes in the global climate system, which cause drought conditions of greater intensity, duration, and frequency. Therefore, changes were detected with the Rodionov method in the SPEI (Standardized Precipitation Evapotranspiration Index) and SPI (Standardized Precipitation Index) indices at 6- and 12-month scales in the state of Durango, Mexico. We analyzed the trends of changes in the mean (RSI) and variance (RSSI) of the indices in 49 stations of the SPI index for 6 months and in 45 of the SPEI index for 6 months. The RSI values identified the beginning of the drought periods, most of the maximum RSI values were presented in July 1992. Trends in the frequency of RSI values decreased during the 2000-2004 period and increased during 2005-2008. The decade of greatest changes in the average was 1990-1999. The highest frequency of RSSI values was in the 1985-1989 period, the changes have remained constant during the last 20 years. The decade of greatest change in variance was 1980-1989.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Durango]]></kwd>
<kwd lng="es"><![CDATA[sequía]]></kwd>
<kwd lng="es"><![CDATA[SPI]]></kwd>
<kwd lng="es"><![CDATA[SPEI]]></kwd>
<kwd lng="es"><![CDATA[Rodionov]]></kwd>
<kwd lng="es"><![CDATA[cambios de media]]></kwd>
<kwd lng="es"><![CDATA[cambios de varianza]]></kwd>
<kwd lng="en"><![CDATA[Durango]]></kwd>
<kwd lng="en"><![CDATA[drought]]></kwd>
<kwd lng="en"><![CDATA[SPEI]]></kwd>
<kwd lng="en"><![CDATA[SPI]]></kwd>
<kwd lng="en"><![CDATA[Rodionov]]></kwd>
<kwd lng="en"><![CDATA[mean changes]]></kwd>
<kwd lng="en"><![CDATA[changes of variance]]></kwd>
</kwd-group>
</article-meta>
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