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O emprego de tecnicas de sensoriamento remoto tem adquirido grande importância em estudos relacionados ao monitoramento dos recursos naturais, propiciando suporte para um gerenciamento mais sustentavel dos recursos hidricos. Baseado nessa premissa, o presente trabalho teve como objetivo avaliar os diferentes componentes do balanco de energia e evapotranspiracao, associados aos diferentes usos e ocupacoes do solo na microbacia Dois Corregos – Selviria – MS, por meio do algoritmo SEBAL (Surface Energy Balance Algorithm for Land), utilizando imagens do satelite Landsat 5 – TM adquiridas ao final do periodo seco e chuvoso da bacia. Os fragmentos de mata apresentam, em relacao as areas com menos cobertura vegetal, menor Indice de Vegetacao da Diferenca Normalizada (NDVI), maior evapotranspiracao e menor valor do Fluxo de Calor Sensivel (H), o que promove reducao substancial na temperatura da superficie. As areas com maior exposicao do solo alem de apresentarem menor evapotranspiracao, possuem elevado fluxo de calor sensivel, o que impacta a temperatura do ar localmente. A tecnica empregada foi capaz de detectar as grandes alteracoes que ocorrem na evapotranspiracao como resultado dos diferentes padroes de cobertura vegetacao, que sao minimizados na estacao chuvosa e realcados na estacao seca. Os padroes evapotranspirativos das areas com maior NDVI sao compativeis com os valores da Evapotranspiracao Real Diaria ETr registrados nos dias selecionados para a pesquisa. 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; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-ansi-language:PT-BR;} A B S T R A C T The use of remote sensing techniques have acquired great importance in studies related to monitoring of natural resources, providing support for a more sustainable management of water resources. Based on this premise, this study aimed to evaluate the different components of energy balance and evapotranspiration associated with different uses and land occupations in the watershed Dois Corregos - Selviria - MS through the SEBAL algorithm (Surface Energy Balance Algorithm for Land) using satellite images Landsat 5 - TM acquired at the end of the dry and rainy seasons of the basin. Forest fragments have in relation to areas with less vegetation cover (lower Difference Vegetation Index Normalized (NDVI), greater evapotranspiration and lower the heat flow sensitive (H), which promotes substantial reduction in surface temperature. The areas with the highest exposure of the soil as well as their lower evapotranspiration, have high sensible heat flux, which impacts the air temperature locally. The technique was able to detect the great changes taking place in evapotranspiration as a result of the different coverage patterns vegetation, which are minimized in the rainy season and highlighted the dry season. The evapotranspirativos patterns of areas with higher NDVI are compatible with the values of the Evapotranspiration Real Daily ETr recorded in the days selected for research Keywords: Landsat 5, Remote Sensing, Energy flows.

Determinação da evapotranspiração real diária em diferentes usos e ocupação do solo (Determination of real evapotranspiration everyday in different uses and land occupation)