<?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>S2007-24222020000100375</article-id>
<article-id pub-id-type="doi">10.24850/j-tyca-2020-01-10</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evolución de los índices comunes de detección y seguimiento de sequías meteorológicas]]></article-title>
<article-title xml:lang="en"><![CDATA[Evolution of the common indices of detection and monitoring of meteorological droughts]]></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]]></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>375</fpage>
<lpage>409</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222020000100375&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222020000100375&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222020000100375&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las sequías son un fenómeno natural recurrente caracterizado por una disminución de la precipitación. Esta condición puede ser exacerbada por las demandas de agua potable, riego y otros usos. Las sequías meteorológicas (SM) implican una reducción en cantidad e intensidad de la lluvia, así como incrementos en la temperatura y evaporación, ya que aumenta la radicación solar al no haber nubosidad. Los índices de sequías son procedimientos operativos que emplean las variables climáticas citadas, los cuales buscan cuantificar ciertas características de las SM para asignar una severidad y así poder establecer su inicio, desarrollo y terminación, permitiendo con ello su comparación en climas diferentes. En este trabajo se describe cronológicamente cómo han evolucionado los índices más comunes de detección y seguimiento de las SM, para cuantificarlas cada año y en lapsos de varios meses. Lo anterior es útil para comenzar y avanzar en el estudio y caracterización de las SM de una localidad o de una región geográfica. Se recomienda progresar en el estudio y la evaluación cuantitativa de las SM, según como se describen los índices, pues su evolución histórica y complejidad computacional coinciden.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Droughts are a recurrent natural phenomenon characterized by a decrease in precipitation. This condition can be aggravated by the demands of drinking water, irrigation and other uses. Meteorological Droughts (MD) imply a reduction in the amount and intensity of rainfall, as well as an increase in temperature and evaporation, since without clouds there is an increase in solar radiation. Drought indices are operating procedures that use the aforementioned climatic variables, seeking to quantify certain characteristics of the MD to assign a severity and thus be able to establish their start, development and termination, allowing their comparison in different climates. This paper describes chronologically how the most common detection and pursuit indices of MD have evolved, allowing their annual and monthly quantification. This compilation is useful to begin and advance in the study and characterization of the MD of a locality or a geographic region. It is recommended to progress in the study and the quantitative evaluation of MD, according to how the indexes are described here, since their historical evolution and their computational complexity coincide.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[sequías meteorológicas (SM)]]></kwd>
<kwd lng="es"><![CDATA[SM anuales]]></kwd>
<kwd lng="es"><![CDATA[SM mensuales]]></kwd>
<kwd lng="es"><![CDATA[índices de sequías (ISP]]></kwd>
<kwd lng="es"><![CDATA[IA]]></kwd>
<kwd lng="es"><![CDATA[RDIst]]></kwd>
<kwd lng="es"><![CDATA[PDSI]]></kwd>
<kwd lng="es"><![CDATA[IZC]]></kwd>
<kwd lng="es"><![CDATA[SPI]]></kwd>
<kwd lng="es"><![CDATA[SPEI y SPDI)]]></kwd>
<kwd lng="en"><![CDATA[Meteorological droughts (MD)]]></kwd>
<kwd lng="en"><![CDATA[annual MD]]></kwd>
<kwd lng="en"><![CDATA[monthly MD]]></kwd>
<kwd lng="en"><![CDATA[drought indices (ISP]]></kwd>
<kwd lng="en"><![CDATA[IA]]></kwd>
<kwd lng="en"><![CDATA[RDIst]]></kwd>
<kwd lng="en"><![CDATA[PDSI]]></kwd>
<kwd lng="en"><![CDATA[IZC]]></kwd>
<kwd lng="en"><![CDATA[SPI]]></kwd>
<kwd lng="en"><![CDATA[SPEI and SPDI)]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alley]]></surname>
<given-names><![CDATA[W. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Palmer drought severity index: Limitations and assumptions]]></article-title>
<source><![CDATA[Journal of Climate and Applied Meteorology]]></source>
<year>1984</year>
<volume>23</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>77-86</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Beguería]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Vicente-Serrano]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Reig]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Latorre]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Standardized Precipitation Evapotranspiration Index (SPEI) revisited: Parameter fitting, evapotranspiration models, tools, datasets and drought monitoring]]></article-title>
<source><![CDATA[International Journal of Climatology]]></source>
<year>2014</year>
<volume>34</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>3001-23</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Campos-Aranda]]></surname>
<given-names><![CDATA[D. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estudio de sequías meteorológicas anuales por medio del índice de aridez, en el estado de Zacatecas, México]]></article-title>
<source><![CDATA[Ingeniería. Investigación y Tecnología]]></source>
<year>2016</year>
<volume>17</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>403-15</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Campos-Aranda]]></surname>
<given-names><![CDATA[D. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cuantificación de sequías meteorológicas mensuales: cotejo de cuatro índices en tres localidades de San Luis Potosí, México]]></article-title>
<source><![CDATA[Tecnología y ciencias del agua]]></source>
<year>2017</year>
<volume>8</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>159-72</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Campos-Aranda]]></surname>
<given-names><![CDATA[D. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detección de sequías meteorológicas anuales en el estado de Zacatecas, México, con base en índices de anomalía estandarizada]]></article-title>
<source><![CDATA[Tecnología y ciencias del agua]]></source>
<year>2018</year>
<volume>9</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>135-49</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Campos-Aranda]]></surname>
<given-names><![CDATA[D. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cuantificación con el SPEI de sequías históricas y bajo cambio climático probable en la estación climatológica Zacatecas, México]]></article-title>
<source><![CDATA[Tecnología y ciencias del agua]]></source>
<year>2018</year>
<volume>9</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>210-33</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Campos-Aranda]]></surname>
<given-names><![CDATA[D. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Análisis estadístico de la ocurrencia de sequías meteorológicas anuales según tipo de clima del estado de San Luis Potosí, México]]></article-title>
<source><![CDATA[Tecnología y ciencias del agua]]></source>
<year>2018</year>
<volume>9</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>213-31</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Campos-Aranda]]></surname>
<given-names><![CDATA[D. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Contrastes del Índice de Sequías de Palmer Estandarizado (SPDI) en tres ubicaciones climáticas de San Luis Potosí, México]]></article-title>
<source><![CDATA[Tecnología y ciencias del agua]]></source>
<year>2018</year>
<volume>9</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>246-79</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cheval]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Standardized Precipitation Index - An overview]]></article-title>
<source><![CDATA[Romanian Journal of Meteorology]]></source>
<year>2015</year>
<volume>12</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>17-64</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cacciamani]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Morgillo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Marchesi]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Pavan]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chapter 2. Monitoring and forecasting drought on a regional scale]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Rossi]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Vega]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Bonaccorso]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<source><![CDATA[Methods and tools for drought analysis and management]]></source>
<year>2007</year>
<page-range>29-48</page-range><publisher-loc><![CDATA[Dordrecht, The Netherlands ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dogan]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Berktay]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[V. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of multi-monthly rainfall-based drought severity indices, with application to semi-arid Konya closed basin, Turkey]]></article-title>
<source><![CDATA[Journal of Hydrology]]></source>
<year>2012</year>
<numero>470-471</numero>
<issue>470-471</issue>
<page-range>255-68</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Elagib]]></surname>
<given-names><![CDATA[N. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Assessment of drought across central Sudan using UNEP dryness ratio]]></article-title>
<source><![CDATA[Hydrology Research]]></source>
<year>2009</year>
<volume>40</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>481-94</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Elagib]]></surname>
<given-names><![CDATA[N. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Elhag]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Major climate indicators of ongoing drought in Sudan]]></article-title>
<source><![CDATA[Journal of Hydrology]]></source>
<year>2011</year>
<volume>409</volume>
<numero>3-4</numero>
<issue>3-4</issue>
<page-range>612-25</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Gironas]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chapter 79. Drought characteristics]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[V. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Handbook of applied hydrology]]></source>
<year>2017</year>
<edition>2nd</edition>
<page-range>79.1-79.12</page-range><publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[McGraw-Hill Education]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fuchs]]></surname>
<given-names><![CDATA[B. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Svoboda]]></surname>
<given-names><![CDATA[M. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilhite]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Hayes]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chapter 12. Drought indices for drought risk assessment in a changing climate]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Eslamian]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[Handbook of engineering hydrology. Modeling, climate change and variability]]></source>
<year>2014</year>
<page-range>217-31</page-range><publisher-loc><![CDATA[Boca Raton, USA ]]></publisher-loc>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guttman]]></surname>
<given-names><![CDATA[N. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Accepting the Standardized Precipitation Index: A calculation algorithm]]></article-title>
<source><![CDATA[Journal of the American Water Resources Association]]></source>
<year>1999</year>
<volume>35</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>311-22</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hao]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[V. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Drought characterization from a multivariate perspective: A review]]></article-title>
<source><![CDATA[Journal of Hydrology]]></source>
<year>2015</year>
<volume>527</volume>
<page-range>668-78</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Karl]]></surname>
<given-names><![CDATA[T. R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The sensitivity of the Palmer drought severity index and Palmer&#8217;s Z-index to their calibration coefficients including potential evapotranspiration]]></article-title>
<source><![CDATA[Journal of Climate and Applied Meteorology]]></source>
<year>1986</year>
<volume>25</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>77-86</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ma]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ren]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Yuan]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Jiang]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Kong]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Gong]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A new standardized Palmer drought index for hydro-meteorological use]]></article-title>
<source><![CDATA[Hydrological Processes]]></source>
<year>2014</year>
<volume>28</volume>
<numero>23</numero>
<issue>23</issue>
<page-range>5645-61</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[McKee]]></surname>
<given-names><![CDATA[T. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Doesken]]></surname>
<given-names><![CDATA[N. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Kleist]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[The relationship of Drought frequency and duration to times scales]]></source>
<year>1993</year>
<conf-name><![CDATA[ 8thConference on Applied Climatology]]></conf-name>
<conf-loc> </conf-loc>
<page-range>179-84</page-range><publisher-loc><![CDATA[Anaheim, California, USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mishra]]></surname>
<given-names><![CDATA[A. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[V. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A review of drought concepts]]></article-title>
<source><![CDATA[Journal of Hydrology]]></source>
<year>2010</year>
<volume>391</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>202-16</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mishra]]></surname>
<given-names><![CDATA[A. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[V. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Drought modeling - A review]]></article-title>
<source><![CDATA[Journal of Hydrology]]></source>
<year>2011</year>
<volume>403</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>157-75</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morid]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Smakhtin]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Moghaddasi]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of seven meteorological indices for drought monitoring in Iran]]></article-title>
<source><![CDATA[International Journal of Climatology]]></source>
<year>2006</year>
<volume>26</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>971-85</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Palmer]]></surname>
<given-names><![CDATA[W. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Meteorological drought]]></source>
<year>1965</year>
<numero>45</numero>
<issue>45</issue>
<publisher-loc><![CDATA[Washington, D. C., USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pandey]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramasastri]]></surname>
<given-names><![CDATA[K. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relationship between the common climatic parameters and average drought frequency]]></article-title>
<source><![CDATA[Hydrological Processes]]></source>
<year>2001</year>
<volume>15</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1019-32</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pandey]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramasastri]]></surname>
<given-names><![CDATA[K. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Incidence of droughts in different climatic regions]]></article-title>
<source><![CDATA[Hydrological Sciences Journal]]></source>
<year>2002</year>
<volume>47</volume>
<numero>S</numero>
<issue>S</issue>
<page-range>S31-40</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pandey]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[K. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Mishra]]></surname>
<given-names><![CDATA[S. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Agarwal]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chapter 21. Drought characterization]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[V. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Hydrology and Hydraulics]]></source>
<year>2008</year>
<page-range>761-92</page-range><publisher-loc><![CDATA[ighlands Ranch, USA ]]></publisher-loc>
<publisher-name><![CDATA[Water Resources Publications.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Panu]]></surname>
<given-names><![CDATA[U. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[T. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Challenges in drought research: Some perspectives and future directions]]></article-title>
<source><![CDATA[Hydrological Sciences Journal]]></source>
<year>2002</year>
<volume>47</volume>
<numero>S</numero>
<issue>S</issue>
<page-range>S19-30</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ponce]]></surname>
<given-names><![CDATA[V. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Pandey]]></surname>
<given-names><![CDATA[R. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Ercan]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Characterization of drought across climatic spectrum]]></article-title>
<source><![CDATA[Journal of Hydrologic Engineering]]></source>
<year>2000</year>
<volume>5</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>222-4</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sene]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chapter 8. Droughts]]></article-title>
<source><![CDATA[Hydro-meteorology. Forecasting and Applications]]></source>
<year>2010</year>
<page-range>239-67</page-range><publisher-loc><![CDATA[London, UK: Springer ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stagge]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Tallaksen]]></surname>
<given-names><![CDATA[L. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Gudmundsson]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Van Loon]]></surname>
<given-names><![CDATA[A. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Stahl]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Candidate distributions for climatological drought indices (SPI and SPEI)]]></article-title>
<source><![CDATA[International Journal of Climatology]]></source>
<year>2015</year>
<volume>35</volume>
<numero>13</numero>
<issue>13</issue>
<page-range>4027-40</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tsakiris]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Vangelis]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Establishing a drought index incorporating evapotranspiration]]></article-title>
<source><![CDATA[European Water]]></source>
<year>2005</year>
<page-range>3-11</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tsakiris]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Tigkas]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Vangelis]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Pangalou]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chapter 9. Regional drought identification and assessment]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Rossi]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Vega]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Bonaccorso]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<source><![CDATA[Methods and tools for drought analysis and management]]></source>
<year>2007</year>
<page-range>169-91</page-range><publisher-loc><![CDATA[Dordrecht, The Netherlands ]]></publisher-loc>
<publisher-name><![CDATA[Springer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vangelis]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Tigkas]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Tsakiris]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of PET method on Reconnaissance Drought Index (RDI) calculation]]></article-title>
<source><![CDATA[Journal of Arid Environments]]></source>
<year>2013</year>
<volume>88</volume>
<page-range>130-40</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vicente-Serrano]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Beguería]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[López-Moreno]]></surname>
<given-names><![CDATA[J. I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A multiscalar Drought Index sensitive to Global Warming: The Standardized Precipitation Evapotranspiration Index]]></article-title>
<source><![CDATA[Journal of Climate]]></source>
<year>2010</year>
<volume>23</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>1696-718</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wells]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Goddard]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Hayes]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A self-calibrating Palmer drought severity index]]></article-title>
<source><![CDATA[Journal of Climate]]></source>
<year>2004</year>
<volume>17</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>2335-51</page-range></nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Hayes]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Weiss]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Hu]]></surname>
<given-names><![CDATA[Q.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An evaluation of the Standardized Precipitation Index, the China-Z Index and the Statistical Z-score]]></article-title>
<source><![CDATA[International Journal of Climatology]]></source>
<year>2001</year>
<volume>21</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>745-58</page-range></nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Hayes]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilhite]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Svoboda]]></surname>
<given-names><![CDATA[M. D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of the length of record on the standardized precipitation index calculation]]></article-title>
<source><![CDATA[International Journal of Climatology]]></source>
<year>2005</year>
<volume>25</volume>
<numero>4</numero>
<issue>4</issue>
</nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Svoboda]]></surname>
<given-names><![CDATA[M. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Hayes]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilhite]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Wen]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Appropriate application of the SPI in arid locations and dry seasons]]></article-title>
<source><![CDATA[International Journal of Climatology]]></source>
<year>2007</year>
<volume>27</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>65-79</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zelen]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Severo]]></surname>
<given-names><![CDATA[N. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chapter 26. Probability functions]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Abramowitz]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Stegun]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<source><![CDATA[Handbook of mathematical functions]]></source>
<year>1972</year>
<page-range>925-95</page-range><publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[Dover Publications]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
