Sensoriamento remoto e smartphones aplicados à agricultura irrigada do Estado de Pernambuco

Abstract

The agricultural aptitude maps assist farmers by providing subsidies for decision-making; however, several maps are available only on paper and digital media, requiring the use of tools such as tracks, compasses, GPS, and computers to use it. With the advancement of information technology and the appearance of smartphones, these devices have been receiving attention for the development of mobile GIS due to its high processing power and mounted sensors such as GPS. The evapotranspiration is essential for irrigation planning although making this estimate for large regions becomes costly. However, the use of satellite images and algorithms such as MOD16 makes it possible, with low cost, to estimate this variable for regional scales. The objective of this work was to develop an application for Android Smartphones that allows the user interaction with climatological water balance maps elements, assisting them in irrigation planning in the state of Pernambuco. It was used maps of soil water storage, images of MOD16 potential evaporation and rain map, for the elaboration climatological water balance maps. The performance of the MOD16 algorithm was evaluated for each mesoregion and it was found that the mesoregions of “Sertão” and “Sertão do São Francisco”, places with arid climates, obtained the best classifications. The mesoregion of the “Região Metropolitana do Recife” presented the worst classification. The application IGmap provides interaction with the ETP, ETR, ETC maps for principal state crops, water deficit and surplus. The user can collect information by clicking on any point on the map and navigate between the months of the year to check the temporal variation of the components of the water balance. Other maps can be embedded in the application, such as pest mapping, soils, production among others increases the functionality of the app.