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O presente trabalho tem como objetivo a delimitacao da bacia hidrografica do rio Doce, que se encontra nos estados de Minas Gerais e Espirito Santo, e a elaboracao do MDEHC em comparacao com o MDE da mesma area, para a delimitacao das Areas de Preservacao Permanente de topo de morro. Para a delimitacao da bacia e a elaboracao do modelo foi empregado o SIG ArcGIS e como base de dados o GDEM do ASTER e hidrografia disponibilizada pela ANA, foi empregada uma composicao colorida do satelite LandSat RGB-345, para a verificacao dos resultados e correcao das falhas detectadas durante a execucao do trabalho. Os resultados obtidos demonstraram a necessidade de modelos com qualidade satisfatoria, para o correto desenvolvimento da metodologia de geracao do modelo hidrologico, visto que houve variacao na direcao de fluxo com a mudanca do MDE para o MDEHC. Tambem houve variacao nos valores de altitude, dos dois modelos, enquanto que o valor o valor maximo obtido no MDEHC foi de 2637 m contra 2868 m no MDE. Esta variacao na altitude e devida ao emprego da ferramenta para a eliminacao das depressoes espurias, demonstrando que esta deve ser empregada com cautela. A variacao no limite gerado com o MDEHC, em relacao ao limite da ANA, demonstrou a necessidade da implementacao de uma rotina computacional no SIG para a delimitacao de bacias onde o exutorio e constituido por uma regiao. Normal 0 false false false PT-BR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri",sans-serif; color:black; mso-ansi-language:PT-BR; mso-fareast-language:PT-BR;} A B S T R A C T This study aims at delineation of rio Doce watershed, located in states of Minas Gerais and Espirito Santo, and the preparation of the Conditioning Hydrografic Digital Elevation Model (CHDEM), for the delineation of areas of permanent preservation on top of hills. For the delineation of the watershed and the development of the model was used the software ArcGIS ® and as database the Global Digital Elevation Map (GDEM) of the Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) including the Hydrography provided by Agencia Nacional de Aguas (ANA). It was made a color composite Landsat RGB-345 satellite, for the verification of the results and correction of faults detected during the execution of the work. The results showed the need for models with satisfactory quality to correct development of the hydrological model generation methodology, as there was variation in the flow direction with the change of the DEM for CHDEM. There was also variation in altitude values ​​of the two models, while the maximum value obtained in CHDEM was 2637 m against 2868 m in DEM. This variation in altitude is due to the use of the tool to eliminate spurious depressions, demonstrating that this should be used with caution. The variation in the boundary generated using CHDEM in relation to the ANA limit, showed the necessity of implementing a Geographic Information System (GIS) computational routine for delineation the watersheds where mouth comprises a region. Keywords: Hidrologyc model, ASTER, Geoprocessing.

Modelo Digital de Elevação Hidrologicamente Consistente para a bacia do rio Doce: Elaboração e Análise (Conditioning hydrographic digital elevation model to rio Doce watershed: preparation and analysis)