<?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>2301-1548</journal-id>
<journal-title><![CDATA[Agrociencia (Uruguay)]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia Uruguay]]></abbrev-journal-title>
<issn>2301-1548</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Agronomía - Instituto Nacional de Investigación Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2301-15482020000101305</article-id>
<article-id pub-id-type="doi">10.31285/agro.24.63</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[WEPP model prediction evaluation of soil water content in northeast Uruguay]]></article-title>
<article-title xml:lang="es"><![CDATA[Evaluación de predicción del Modelo WEPP del contenido hídrico del suelo en el noreste de Uruguay]]></article-title>
<article-title xml:lang="pt"><![CDATA[Avaliação preditiva do modelo WEPP de conteúdo de água no solo no nordeste do Uruguai]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez Bidegain]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bentancur]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de la República Centro Universitario Regional Departamento del Agua]]></institution>
<addr-line><![CDATA[Salto ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de la República Facultad de Agronomía Departamento de Suelos y Aguas]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de la República Facultad de Agronomía Departamento de Estadística]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>24</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S2301-15482020000101305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S2301-15482020000101305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S2301-15482020000101305&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: WEPP is a process-based model that estimates runoff and water erosion at slope level, maintaining a soil water balance at daily pace. The objective of this work is to adjust and validate the water balance component of the WEPP model in two watershed management situations (afforestation and natural grassland field) to obtain an adjusted tool that determines runoff and erosion. Soil water content data measured with neutron probe 4 times in the year down to 1.3 m depth during 10 years were used, and were compared with WEPP estimates. The results indicate that the WEPP estimations were not good (Efficiency coefficient (E) = 0.03, -1.29, -0.01, -1.74, 0.17 and -0.08 for the profiles) in high slope (C), average slope (D) and low slope (F), in the Grassland and afforested watershed, respectively, with an E considered insufficient and with periods of over and underestimation water content for both management situations. A better fit was obtained by eliminating the data outside of the calibration line in the profile C, with no improvement for the D and F profiles in both management situations. The results indicate that parameters such as evapotranspiration and WEPP equations must be adjusted to achieve better performance.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El modelo WEPP se basa en procesos que estiman escurrimiento y erosión hídrica a nivel de ladera, manteniendo un balance hídrico del suelo en forma diaria. El objetivo de este trabajo es ajustar y validar el componente balance hídrico del modelo WEPP en dos situaciones de manejo de cuencas (forestada y pastura natural) para obtener una herramienta ajustada que permita estimar escurrimiento y erosión. Se utilizaron datos de agua en el suelo medidos con sonda de neutrones cuatro veces por año hasta 1,3 m de profundidad durante diez años, y se los comparó con los datos simulados con el modelo WEPP. Los resultados indican que la estimación del modelo en los perfiles situados en ladera alta (C), ladera media (D) y ladera baja (F) para ambas cuencas no fue buena (Coeficiente de eficiencia (E) = 0,03, -1,29, -0,01, -1,74, 0,17 y -0,08 para los perfiles C, D y F en la cuenca de pastura natural y forestada, respectivamente), con E considerado como insuficiente y con períodos de sobre y subestimación del contenido de agua en el suelo para ambas situaciones de manejo. Al eliminar los datos de contenido de agua registrados por fuera de la recta de calibración de la sonda de neutrones, los resultados presentaron un mejor ajuste para el perfil C, no registrándose igual mejora para los perfiles D y F en ambas situaciones de manejo. Los resultados indican que se deben ajustar parámetros como la evapotranspiración y las ecuaciones del modelo WEPP para lograr su mejor performance.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo: O modelo WEPP é baseado em processos que estimam o escoamento superficial e a erosão hídrica no nível da encosta, mantendo um balanço hídrico do solo diariamente. O objetivo deste trabalho é ajustar e validar o componente de balanço hídrico do modelo WEPP em duas situações de manejo da bacia (pastagens florestadas e naturais) para obter uma ferramenta ajustada que permita estimar o escoamento superficial e a erosão. Os dados de água no solo medidos pela sonda de nêutrons foram usados quatro vezes por ano, com profundidade de 1,3 m por dez anos e comparados com dados simulados usando o modelo WEPP. Os resultados indicam que a estimativa do modelo nos perfis localizados nos declives alto (C), médio (D) e baixo (F para ambas as bacias) não foi boa (coeficiente de eficiência (E) = 0,03, -1,29, -0,01, -1,74, 0,17 e -0,08 para os perfis C, D e F na bacia de pastagem natural e florestal, respectivamente) com E considerado insuficiente e com períodos de super e subestimação do teor de água no solo para ambos Situações de gerenciamento: Ao eliminar os dados de conteúdo de água registrados fora da linha de calibração da sonda de nêutrons, os resultados mostraram uma melhor adequação ao perfil C, não registrando a mesma melhoria para o D e F em ambas as situações de gerenciamento. Os resultados indicam que parâmetros como evapotranspiração e equações do modelo WEPP devem ser ajustados para alcançar seu melhor desempenho.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[water balance]]></kwd>
<kwd lng="en"><![CDATA[WEPP]]></kwd>
<kwd lng="en"><![CDATA[validation]]></kwd>
<kwd lng="es"><![CDATA[balance hídrico]]></kwd>
<kwd lng="es"><![CDATA[WEPP]]></kwd>
<kwd lng="es"><![CDATA[validación]]></kwd>
<kwd lng="pt"><![CDATA[balanço hídrico]]></kwd>
<kwd lng="pt"><![CDATA[WEPP]]></kwd>
<kwd lng="pt"><![CDATA[validação]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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