<?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>S2007-24222016000100035</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Temporal Patterns in River Flows in Basins in Northern Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Patrones temporales de flujo del río en las cuencas del norte de México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Návar]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lizárraga-Mendiola]]></surname>
<given-names><![CDATA[Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Ciudad Victoria  ]]></institution>
<addr-line><![CDATA[Ciudad Victoria Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de Hidalgo Área Académica de Ingeniería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2016</year>
</pub-date>
<volume>7</volume>
<numero>1</numero>
<fpage>35</fpage>
<lpage>44</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-24222016000100035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-24222016000100035&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-24222016000100035&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In the dry basins in northern Mexico, concern about rivers is focused on seasonal and long-term variations in river flows that may be attributable to climate change, since it affects the water supply for domestic, industrial, public and agricultural uses. The objective of this research was to separate daily flow components and understand the patterns in 172 time-series corresponding to five rivers in northern Mexico. The headwaters of the San Pedro, Sinaloa, Nazas-Aguanaval, San Juan and San Fernando-Soto La Marina rivers are located in the Sierra Madre Occidental and Oriental, and flow through the plains into the Pacific Ocean, the Gulf of Mexico and the Central Plateau in northern Mexico, providing over 90% of the water supply for all uses. The Rora computer program isolated the base and direct flows from the total. The Mann-Kendall test and the Seno S method evaluated the trends and magnitudes of the changes in annual and monthly flow, monthly standard deviation, and daily maximums and minimums for total, direct and base flows. The results found that the base and direct flows were in equilibrium for most of the rivers. Meanwhile, each one of the variables analyzed had statistically significant trends at 40% of the hydrometric stations. Over 26% of the stations showed a consistent reduction in flow over time. Although additional investigations are needed to quantitatively isolate the potential sources of the variations to explain the temporal trends, the causes can preliminarily be attributed to climate variability in combination with natural resource management practices. The effect of potential climate change cannot be excluded from these patterns.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En las cuencas áridas del norte de México, las preocupaciones por los ríos se centran en las variaciones estacionales y de largo tiempo en la descarga de los ríos que pudiera ser atribuida al cambio climático porque controla el suministro de agua para los usos domésticos, industriales, públicos y agrícolas. El objetivo de esta investigación fue separar los componentes del caudal diario y entender los patrones de 172 series de tiempo de cinco ríos del norte de México. Los ríos San Pedro, Sinaloa, Nazas-Aguanaval, San Juan y San Fernando-Soto La Marina nacen en las montañas de las Sierras Madre Oriental y Occidental, y fluyen a través de las planicies del océano Pacífico, el Golfo de México y la Mesa Central del norte de México, proveyendo con más de 90% del suministro de agua para todos los usos. El programa de cómputo Rora separó los flujos base y directo del total. La prueba de Mann-Kendall y el método del Seno S evaluaron las tendencias y magnitud del cambio de la descarga anual, mensual, desviación estándar mensual, y mínimo y máximo diario para los flujos total, directo y base. Los resultados mostraron que los flujos base y directo se encuentran en equilibrio para la mayoría de los ríos, pero más de 40% de las estaciones hidrométricas tuvieron tendencias estadísticamente significativas en cada una de las variables analizadas. Más de 26% de la estaciones mostraron un reducción consistente del caudal en tiempo. Aunque se necesita de investigación adicional para aislar de modo cuantitativo las potenciales fuentes de variación que explican las tendencias temporales, éstas pueden ser preliminarmente atribuidas a la variabilidad climática, en combinación con las prácticas de recursos naturales, pero el efecto del potencial cambio climático no puede ser excluido de estos patrones.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Negative discharge tendency]]></kwd>
<kwd lng="en"><![CDATA[drought magnification]]></kwd>
<kwd lng="en"><![CDATA[base flow]]></kwd>
<kwd lng="en"><![CDATA[direct flow and total discharge]]></kwd>
<kwd lng="es"><![CDATA[tendencia negativa]]></kwd>
<kwd lng="es"><![CDATA[magnificación de la sequía]]></kwd>
<kwd lng="es"><![CDATA[caudal base]]></kwd>
<kwd lng="es"><![CDATA[directo y total]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Convection and Rainfall over Mexico and their Modulation by the Southern Oscillation]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cavazos]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Hastenrath]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[International Journal of Climatology]]></source>
<year>1990</year>
<volume>10</volume>
<page-range>377-86</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<collab>Comprehensive Assessment Secretariat</collab>
<source><![CDATA[Insights from the Comprehensive Assessment of Water Management in Agriculture]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Stockholm ]]></publisher-loc>
<publisher-name><![CDATA[World Water Week]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Principal Components-Based Regionalization of Precipitation Regimes across the Southwest United State and Northern Mexico, with Application to Monsoon Precipitation Variability]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Comrie]]></surname>
<given-names><![CDATA[A. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Glenn]]></surname>
<given-names><![CDATA[E. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Climate Research]]></source>
<year>1998</year>
<volume>10</volume>
<page-range>201-15</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<collab>Conagua</collab>
<source><![CDATA[Estadísticas del agua en México]]></source>
<year>2005</year>
<publisher-loc><![CDATA[México, DF ]]></publisher-loc>
<publisher-name><![CDATA[Comisión Nacional del Agua, Secretaría de Medio Ambiente y Recursos Naturales]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<collab>Conagua</collab>
<source><![CDATA[Estadísticas del agua en México]]></source>
<year>2012</year>
<publisher-loc><![CDATA[México, DF ]]></publisher-loc>
<publisher-name><![CDATA[Comisión Nacional del Agua, Secretaría de Medio Ambiente y Recursos Naturales]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<collab>Conapo</collab>
<source><![CDATA[Estimaciones de la población en México]]></source>
<year>2000</year>
<publisher-loc><![CDATA[México, DF ]]></publisher-loc>
<publisher-name><![CDATA[Consejo Nacional de Población]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<collab>IPCC</collab>
<source><![CDATA[Impacts, Adaptation, and Vulnerability. Summary for Policy Makers]]></source>
<year>2014</year>
<publisher-loc><![CDATA[Cambridge, UK ]]></publisher-loc>
<publisher-name><![CDATA[Intergovernmental Panel on Climate Change, Cambridge University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Desertification Processes Associated to Overgrazing Practices in Tamaulipan Thorn Scrub of Linares, N. L., Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Manzano]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Návar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Journal of Arid Environments]]></source>
<year>2000</year>
<volume>44</volume>
<page-range>1-17</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Overgrazing and Desertification in México: Highlights on the Northeastern Region]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Manzano]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Návar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Pando]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Annals of Arid Zone]]></source>
<year>2000</year>
<volume>39</volume>
<page-range>285-304</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Análisis de tendencias de precipitación (1920-2004) en México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Méndez-González]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Návar-Cháidez]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[González-Ontiveros]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<source><![CDATA[Investigaciones Geográficas]]></source>
<year>2008</year>
<volume>65</volume>
<page-range>38-55</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effects of Climate Change on Freshwater Ecosystems of United States and the Gulf of Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mulholland]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Best]]></surname>
<given-names><![CDATA[G. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Coutant]]></surname>
<given-names><![CDATA[C. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Hornberger]]></surname>
<given-names><![CDATA[G. M]]></given-names>
</name>
<name>
<surname><![CDATA[Meyer]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Robinson]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Stemberg]]></surname>
<given-names><![CDATA[J. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Turner]]></surname>
<given-names><![CDATA[R. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Vera-Herrera]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Wetzel]]></surname>
<given-names><![CDATA[R. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Hydrological Processes]]></source>
<year>1997</year>
<volume>11</volume>
<page-range>949-70</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Soil erosion and land use in Northeastern Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Návar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Synnott]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Terra]]></source>
<year>2000</year>
<month>a</month>
<volume>18</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>247-53</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Reconstrucción de las sequías en los últimos 10 mil años en el norte de México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Návar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agrofaz]]></source>
<year>2008</year>
<volume>8</volume>
<page-range>41- 53</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Modeling the Water Balance Components for the Management of the Watershed 'La Rosilla', Durango, Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Návar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agrofaz]]></source>
<year>2013</year>
<volume>13</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>91-103</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Soil infiltration and land use in Northeastern Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Návar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Synnott]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Terra]]></source>
<year>2000</year>
<month>b</month>
<volume>18</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>255-62</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Carbon Fluxes Resulting from Land Use Changes in the Tamaulipan Thorn Scrub of Northeastern Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Návar-Chaidez]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Carbon Balance and Management]]></source>
<year>2008</year>
<page-range>1-11</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Water Scarcity and Land Degradation in the Rio San Juan Watershed of Northeastern Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Návar-Chaidez]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Frontera Norte]]></source>
<year>2011</year>
<volume>23</volume>
<numero>46</numero>
<issue>46</issue>
<page-range>125-50</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Hydro-Climatic Variability and Forest Fires in Mexico's Northern Temperate Forests]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Návar-Cháidez]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Lizárraga-Mendiola]]></surname>
<given-names><![CDATA[L. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geofísica Internacional]]></source>
<year>2013</year>
<volume>52</volume>
<page-range>5-20</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Irrigation Management under Water Scarcity]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pereyra]]></surname>
<given-names><![CDATA[L. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Oweis]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Zairi]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agricultural and Water Management]]></source>
<year>2002</year>
<volume>57</volume>
<page-range>175-206</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Entering an Era of Water Scarcity: The Challenges Ahead]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Postel]]></surname>
<given-names><![CDATA[L. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ecological Applications]]></source>
<year>2000</year>
<volume>10</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>941-8</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramos-Juárez]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Cambios de uso del suelo en la cuenca del río San Pedro]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Durango, México ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Ciencias Forestales, Universidad Juárez del Estado de Durango]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rutledge]]></surname>
<given-names><![CDATA[A. T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Computer Programs for Describing the Recession of Ground-Water Discharge and for Estimating Mean Ground-Water Recharge and Discharge from Streamflow Data-Update]]></source>
<year>1998</year>
<publisher-loc><![CDATA[Washington, DC ]]></publisher-loc>
<publisher-name><![CDATA[U.S. Geological Survey Water-Resources Investigations]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rzedowskii]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[La vegetación de México]]></source>
<year>1980</year>
<publisher-loc><![CDATA[México, DF ]]></publisher-loc>
<publisher-name><![CDATA[Editorial Limusa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schmandt]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Aguilar]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Armstrong]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Chapa]]></surname>
<given-names><![CDATA[L. Contreras]]></given-names>
</name>
<name>
<surname><![CDATA[S.]]></surname>
<given-names><![CDATA[Edwards]]></given-names>
</name>
<name>
<surname><![CDATA[R.]]></surname>
<given-names><![CDATA[Hazelton]]></given-names>
</name>
<name>
<surname><![CDATA[J.]]></surname>
<given-names><![CDATA[Mathis]]></given-names>
</name>
<name>
<surname><![CDATA[M. Návar]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Vogel]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Ward]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Water and Sustainable Development. Executive Summary]]></source>
<year>2000</year>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<collab>UNCED</collab>
<source><![CDATA[United Nations Conference on Environment and Development. Agenda 21, Chapter 18, sections 8 and 9]]></source>
<year>1992</year>
<publisher-loc><![CDATA[Rio de Janeiro ]]></publisher-loc>
<publisher-name><![CDATA[UNCED]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ward]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Water Supply in the US Side of the Lower Rio Bravo/Rio Grande Watershed. HARC-TTESM Joint Research Project on Water and Sustainable Development in the Binational Lower Rio Grande/Rio Bravo Basin]]></source>
<year>1998</year>
<publisher-loc><![CDATA[Monterrey, Mexico ]]></publisher-loc>
<publisher-name><![CDATA[ITESM]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
