Estimation of the Evapotranspiration of Irrigated Açaí (Euterpe oleracea M.), through the Surface Energy Balance Algorithm for Land—SEBAL, in Eastern Amazonia

The culture of açaí (Euterpe oleraceae M.), originating from floodplain areas, was planted on dry land in many properties Pará, Brazil, making necessary the use irrigation. To irrigate adequately with less waste, it is that studies aim at increasing efficiency water this sector, and one ways to do so estimate evapotranspiration (ET). objective study actual daily using Surface Energy Balance Algorithm for Land (SEBAL) eastern Amazonia. Six images Landsat 8 satellite were used, estimates SEBAL algorithm showed good agreement results obtained by Bowen ratio method area planting, including mean absolute error (MAE), relative (MRE), root square (RMSE), concordance index (d index) equal 0.45 mm day−1, 4.23%, 0.52 0.80, respectively. ability distinguish soil cover, demonstrating sensitivity model, which provided mapping components analyzed. helps decision regarding irrigation management reducing costs losses.