<?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>0871-018X</journal-id>
<journal-title><![CDATA[Revista de Ciências Agrárias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. de Ciências Agrárias]]></abbrev-journal-title>
<issn>0871-018X</issn>
<publisher>
<publisher-name><![CDATA[Sociedade de Ciências Agrárias de Portugal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0871-018X2023000500001</article-id>
<article-id pub-id-type="doi">10.19084/rca.33350</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Modelação da topografia do terreno e simulação da erosão hídrica numa pequena bacia hidrográfica com uso agro-florestal]]></article-title>
<article-title xml:lang="en"><![CDATA[Topography modelling and simulation of soil erosion by water, in a small agro-forestry basin]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duarte]]></surname>
<given-names><![CDATA[António Canatário]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[Carla]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vitali]]></surname>
<given-names><![CDATA[Giuliano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico de Castelo Branco Escola Superior Agrária ]]></institution>
<addr-line><![CDATA[Castelo Branco ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,UBI Centro de Estudos GEOBIOTEC ]]></institution>
<addr-line><![CDATA[Covilhã ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,IPCB Centro de Estudos CERNAS ]]></institution>
<addr-line><![CDATA[Castelo Branco ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade de Estocolmo Departamento de Geografia e Bolin Centro de Investigação para o Clima ]]></institution>
<addr-line><![CDATA[Estocolmo ]]></addr-line>
<country>Suécia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Politécnico de Coimbra Centro de Recursos Naturais, Ambiente e Sociedade (CERNAS) Escola Superior Agrária]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,University of Bologna School of Agriculture ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Italy</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>46</volume>
<numero>sp</numero>
<fpage>1</fpage>
<lpage>10</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0871-018X2023000500001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0871-018X2023000500001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0871-018X2023000500001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Na simulação dos impactes das atividades agrícolas na poluição difusa à escala da bacia hidrográfica, é importante uma adequada configuração topográfica do terreno e a compreensão do seu comportamento hidrológico. Neste estudo foi utilizado o módulo FlowNet Generator, componente do modelo AnnAGNPS (Annualized Agriculture Nonpoint Source), para avaliação da influência da resolução vertical do Modelo Digital do Terreno (MDT) na configuração topográfica e hidrológica, e no processo de erosão hídrica do solo, de uma pequena bacia agro-florestal (190 ha) localizada no concelho de Idanha-a-Nova. Foi realizado um levantamento georeferenciado da rede de drenagem superficial da bacia, que foi depois comparada com os resultados das redes simuladas pelo módulo FlowNet Generator para dois MDT com resoluções verticais de 1 m e 5 m. Verificou-se que o MDT com resolução vertical de 5 m não conduziu a resultados satisfatórios, dado que a rede de drenagem natural simulada se afastava significativamente da observada no campo. Por outro lado, a rede de drenagem natural gerada com o MDT de resolução de 1m foi bastante próxima da rede observada. A influência da diferente configuração topográfica da bacia hidrográfica na simulação do processo de erosão hídrica do solo, com o modelo RUSLE, traduziu-se numa diferença significativa considerando os valores de 5.85 e 4.17 ton/ha.ano, respectivamente para o MDT com 1 m e 5 m de resolução vertical.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract To simulate the impacts of agricultural activities on diffuse pollution at the basin scale, it is important to use adequate topographic data and understand its hydrological behavior. In this study, the FlowNet Generator module, component of the AnnAGNPS (Annualized Agriculture Nonpoint Source) model, was used to evaluate the influence of the vertical resolution of the Digital Elevation Model (DEM) on the topographic and hydrological configuration, and on runoff-erosion process, of a small agro-forestry basin (190 ha) located in the municipality of Idanha-a-Nova. A georeferenced survey of the basin's stable surface drainage network was carried out, and the results were compared with output network simulated by FlowNet Generator module for two DEMs with vertical resolutions of 1 m and 5 m. It was observed that the DEMs with a vertical resolution of 5m did not lead to satisfactory results, given that the simulated natural drainage network was significantly different from the one observed in the field. On the other hand, the natural drainage network generated with the 1m resolution DEM was very close to the observed network. The influence of the different topographic configuration of the basin in the simulation of soil erosion by water, using the RUSLE model, resulted in a significant difference considering the values of 5.85 and 4.17 ton/ha.year, respectively for the DEM with 1 m and 5 m vertical resolution.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Modelo Digital do Terreno]]></kwd>
<kwd lng="pt"><![CDATA[modelo RUSLE]]></kwd>
<kwd lng="pt"><![CDATA[modelação da topografia do terreno]]></kwd>
<kwd lng="pt"><![CDATA[simulação da erosão hídrica em bacias hidrográficas]]></kwd>
<kwd lng="en"><![CDATA[Digital Elevation Model]]></kwd>
<kwd lng="en"><![CDATA[RUSLE model]]></kwd>
<kwd lng="en"><![CDATA[topography modelling]]></kwd>
<kwd lng="en"><![CDATA[soil erosion]]></kwd>
<kwd lng="en"><![CDATA[agro-forestry basin]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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