<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792023000100204</article-id>
<article-id pub-id-type="doi">10.28940/terra.v41i0.1600</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Hidroquímica y calidad del agua para riego de las RH 21 y 23 costa de Oaxaca y costa de Chiapas, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Hydrochemistry and water quality for irrigation of RH 21 and 23 costa de Oaxaca and costa de Chiapas, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camacho-Ballesteros]]></surname>
<given-names><![CDATA[Adriana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortega-Escobar]]></surname>
<given-names><![CDATA[Héctor Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Bernal]]></surname>
<given-names><![CDATA[Edgar Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Magdaleno]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gardezi]]></surname>
<given-names><![CDATA[Abdul Khalil]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendoza-Saldivar]]></surname>
<given-names><![CDATA[Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mercado-Fernández]]></surname>
<given-names><![CDATA[Teobaldis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Avelar-Roblero]]></surname>
<given-names><![CDATA[Juan Uriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Mar  ]]></institution>
<addr-line><![CDATA[Pochutla Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico Superior del Oriente del Estado de Hidalgo  ]]></institution>
<addr-line><![CDATA[Apan Hidalgo]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Cordoba  ]]></institution>
<addr-line><![CDATA[Montería Cordoba]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>41</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792023000100204&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792023000100204&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792023000100204&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La región hidrológica 21 costa de Oaxaca, presenta una activa dinámica turística, en ella se genera un ingreso económico importante y es considerada la cuarta región socioeconómica más importante del estado de Oaxaca. De igual manera, la Región Hidrológica 23 costa de Chiapas, tiene una economía regida por las actividades del sector terciario, está comprendida por las regiones socioeconómicas Istmo-Costa y Soconusco, ésta última es la principal región que aporta al producto interno bruto del estado de Chiapas. Cabe señalar, que dicho crecimiento socioeconómico ha exigido una mayor demanda del recurso agua, que ha ocasionado la contaminación del mismo. El deterioro de los recursos hídricos de la zona tiene su origen en la descarga de aguas residuales, de desechos sólidos y de agroquímicos a los cauces naturales. Con la finalidad de valorar el estado de los recursos hídricos de las regiones hidrológicas 21 y 23, se establecieron 31 sitios de muestreo en la primavera de 2021 distribuidos en las corrientes principales. En cada muestra se analizaron las propiedades químicas: pH, conductividad eléctrica (CE), aniones y cationes principales (CO3 2-, HCO3-, Cl-, SO4 2-, Ca2+, Mg2+, Na+ y K+), sólidos totales disueltos (STD), porcentaje de sodio (%Na), relación de adsorción de sodio (RAS), carbonato de sodio residual (CSR) e índice de permeabilidad (IP), así como una evaluación hidroquímica. Las aguas de las regiones hidrológicas 21 y 23 presentan como facie dominante la bicarbonatada cálcico-magnésica, cuyo posible origen es consecuencia del proceso de dilución del material geológico (interacción agua-roca) con concentraciones bajas y medias. Con respecto a la salinidad el 45.16% son aguas de salinidad baja y el 93.55% de los sitios tiene baja sodicidad, por lo tanto, se consideran recomendables para el riego con restricciones moderadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: The hydrological region 21 coast of Oaxaca has an active tourist dynamic, it generates significant economic income, and it is considered the fourth most important socioeconomic region in the state of Oaxaca. Similarly, hydrological region 23 coast of Chiapas, has an economy governed by tertiary sector activities and is comprised of the Istmo-Costa and Soconusco socioeconomic regions, the latter is the main region that contributes to the gross domestic product of the state of Chiapas. It should be noted that this socioeconomic growth has required a greater demand for water resources, which has led to water pollution. The deterioration of the area&#8217;s water resources is caused by the discharge of wastewater, solid waste and agrochemicals into natural waterways. In order to assess the state of the water resources of hydrological regions 21 and 23, 31 sampling sites were established in the spring of 2021 distributed in the main streams. Each sample was analyzed for chemical properties: pH, electrical conductivity (EC), major anions and cations (CO3 2-, HCO3-, Cl-, SO4 2-, Ca2+, Mg2+, Na+ and K+), total dissolved solids (TDS), percentage of sodium (%Na), adsorption ratio of sodium (RAS), residual sodium carbonate (RSC), permeability index (PI), as well as a hydrochemical evaluation. The waters of the hydrological regions 21 and 23 present as dominant facies the calcium-magnesium bicarbonate, whose possible origin is a consequence of the dilution process of the geological material (water-rock interaction) with low and medium concentrations. With respect to salinity, 45.16% are low salinity waters and 93.55% of the sites have low sodium, therefore, they are considered recommended for irrigation with moderate restrictions.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[facie]]></kwd>
<kwd lng="es"><![CDATA[índice de permeabilidad]]></kwd>
<kwd lng="es"><![CDATA[índice de saturación]]></kwd>
<kwd lng="es"><![CDATA[salinidad]]></kwd>
<kwd lng="es"><![CDATA[sodicidad]]></kwd>
<kwd lng="en"><![CDATA[facie]]></kwd>
<kwd lng="en"><![CDATA[permeability index]]></kwd>
<kwd lng="en"><![CDATA[saturation index]]></kwd>
<kwd lng="en"><![CDATA[salinity]]></kwd>
<kwd lng="en"><![CDATA[sodicity]]></kwd>
</kwd-group>
</article-meta>
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