@Article{CapoaneCostKupl:2017:EsCaMu,
               author = "Capoane, Viviane and Costa, Luis Fernando Flenik and Kuplich, 
                         Tatiana Mora",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Efeito da resolu{\c{c}}{\~a}o de modelos digitais de 
                         eleva{\c{c}}{\~a}o na deriva{\c{c}}{\~a}o do {\'{\i}}ndice 
                         topogr{\'a}fico de umidade: estudo de caso no munic{\'{\i}}pio 
                         de Palmitinho-RS",
              journal = "Geografia em Quest{\~a}o",
                 year = "2017",
               volume = "10",
               number = "2",
                pages = "9--23",
             keywords = "An{\'a}lise do terreno, Escoamento superficial, 
                         Satura{\c{c}}{\~a}o, Poluentes, Terrain analysis, Runoff, 
                         Saturation, Pollutant.",
             abstract = "A topografia exerce um importante controle sobre os processos 
                         hidrol{\'o}gicos. Uma abordagem para quantificar esse controle 
                         {\'e} o {\'{\I}}ndice Topogr{\'a}fico de Umidade (ITU). Este 
                         {\'{\i}}ndice {\'e} determinado a partir de Modelos Digitais de 
                         Eleva{\c{c}}{\~a}o (MDEs) em ambiente do sistema de 
                         informa{\c{c}}{\~a}o geogr{\'a}fica. Embora o c{\'a}lculo seja 
                         relativamente simples, as diferen{\c{c}}as de 
                         resolu{\c{c}}{\~o}es entre os MDEs podem ter impactos 
                         significativos sobre o ITU. A proposta deste trabalho foi analisar 
                         os efeitos da resolu{\c{c}}{\~a}o de MDEs no c{\'a}lculo do ITU 
                         para o munic{\'{\i}}pio de Palmitinho, a fim de selecionar a 
                         melhor resolu{\c{c}}{\~a}o de MDE capaz de separar as {\'a}reas 
                         com potencial de satura{\c{c}}{\~a}o h{\'{\i}}drica e 
                         gera{\c{c}}{\~a}o de escoamento superficial. O ITU foi calculado 
                         com base nos atributos do terreno declividade e {\'a}rea de 
                         contribui{\c{c}}{\~a}o espec{\'{\i}}fica a partir de tr{\^e}s 
                         MDEs de diferentes resolu{\c{c}}{\~o}es (20m, 30m e 90m). Os 
                         resultados foram comparados em termos de diferen{\c{c}}as 
                         quantitativas e de distribui{\c{c}}{\~a}o espacial. A 
                         compara{\c{c}}{\~a}o entre os {\'{\i}}ndices revelou que 
                         conforme a resolu{\c{c}}{\~a}o do MDEdiminui os intervalos do 
                         ITU tamb{\'e}m diminuem. Isso tem como consequ{\^e}ncia 
                         subestimar {\'a}reas {\'u}midas e superestimar as {\'a}reas 
                         secas. O MDE de resolu{\c{c}}{\~a}o mais fina apresentou com 
                         mais detalhe as {\'a}reas com potencial de gera{\c{c}}{\~a}o de 
                         escoamento superficial. ABSTRACT: Topography is an important 
                         control on hydrological processes. One approach to quantify this 
                         control is the Topographic Wetness Index (TWI). This index is 
                         determined through Digital Elevation Models (DEMs) using a 
                         geographic information system. Although the calculation is 
                         relatively simple, the different resolutions between the DEMs 
                         could have significant impact on the TWI. The purpose of this 
                         study was to analyze the effects of DEMs resolution in the TWI 
                         calculation to Palmitinho County with the intent to select the 
                         best DEM resolution can separating the areas with potential water 
                         saturation and generation of surface runoff.The TWI was calculate 
                         based on the terrain attributes, declivity and specific 
                         contribution area and from three different DEMs with different 
                         resolutions (20m, 30m and 90m). The results were compared in terms 
                         of quantitative difference and space distribution. The comparison 
                         between the indexes revealed that as DEM resolution decreases the 
                         TWI range also decreases. This has a consequence the 
                         underestimation of wetness areas and overestimation of dry areas. 
                         The DEM with finer resolution showed with more details areas with 
                         potential to generate runoff.",
                 issn = "2178-0234",
                label = "lattes: 3598069757374025 1 CapoaneKuplCost:2017:EsCaMu",
             language = "pt",
           targetfile = "capoane_efeito.pdf",
                  url = "http://e-revista.unioeste.br/index.php/geoemquestao/article/view/15134/11940",
        urlaccessdate = "05 maio 2024"
}