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Nesse trabalho realizou-se um mapeamento das unidades de relevo no municipio de Jaguari/RS, com base na analise de atributos topograficos, entre eles, com destaque a hipsometria, a declividade, o plano de curvatura e o perfil de curvatura. O objetivo geral do trabalho e o de realizar o mapeamento das unidades de relevo na area de estudo e, posteriormente, identificar as caracteristicas particulares e a localizacao espacial dessas unidades. Todos os procedimentos metodologicos foram realizados com a utilizacao do aplicativo ArcGIS®, junto a utilizacao de uma cena da imagem SRTM, bem como com uma imagem do Landsat 8 OLI e TIRS, ambas obtidas por meio do sitio do USGS. As rotinas metodologicas do trabalho podem ser sintetizadas com a analise da relacao entre a distribuicao das unidades de relevo com os distintos usos da terra (classificacao digital realizada junto a imagem Landsat 8 OLI e TIRS). Ainda, verificou-se a tendencia da area quanto a provaveis processos erosivos, assim sendo, cerca de 64% da area ficou englobada dentro de uma classificacao de "alta tendencia" a ocorrencia de processos erosivos. Com a analise acerca da correlacao entre uso da terra com as unidades de relevo, verificou-se que as areas consideradas como de "alta tendencia" a processos erosivos, estao dispostas, principalmente nos locais da superficie caracterizados como "solo exposto", maximizando o alerta a area no que se refere a provaveis futuros problemas quanto a perda de solo. Palavras-chaves : Sistema de Informacoes Geograficas, Modelagem, Geomorfologia, Jaguari/RS. Abstract In the present paper was performed a mapping of relief units in the city of Jaguari/Brazil, based on the analysis topographic attributes, for example: the altimetry, slope, curvature plan and curvature profile. The general aim this paper is to perform the mapping of relief units in the study area and, thereafter, identify the characteristics and the spatial location these units. All the methodological procedures were performed using the ArcGIS®, and with a scene SRTM image, and with one image of Landsat 8 OLI and TIRS, both obtained through USGS site. The methodological paper routines can be synthesized with analysis of the interaction between distributions of relief units together with different land uses (digital classification conducted using image Landsat 8 OLI and TIRS). It should be noted that was further analyzed the tendency of the study area as the likely occurrence of erosion processes, therefore, was found 64% of the area is characterized with labeling of "high trend" the occurrence of erosion. Analyzing the data refers to correlation between land use with relief units, was observed that the areas considered as "high trend" the occurrence of erosion, are located, mainly the local surface classified as "exposed soil" increasing the concern in these area as regards probable future problems with the loss of soil (erosion). Keywords : Geographic Information System, Modeling, Geomorphology, Jaguari/RS

caderno de geografia

Caracterização detalhada das unidades de relevo do município de Jaguari (RS), Brasil / Detailed characterization of units relief in city of Jaguari (RS), Brazil