Abstract
The knowledge of the spatial-temporal dynamics of evapotranspiration is of great importance for the accomplishment of agroclimatic zoning and, therefore, for the design of irrigation systems and management of water use in irrigated perimeters. In this context, this study aimed to generate, with the aid of geotechnologies, information that can support irrigation systems planning and design, based on the temporal distribution of daily climatological normals and on evapotranspiration mapping for the irrigated perimeter of Gorutuba/MG. Climatic data were obtained from the meteorological station of the National Institute of Meteorology (INMET) of the municipality of Janaúba/MG in the period from 1985 to 2014. It was verified the non-tendentiousness and the temporal dependence of the climate data using variogram analysis and the temporal dependence index, respectively. For the interpolation, it was used ordinary kriging. The evapotranspiration mapping was conducted from 180 monthly images, from 2000 to 2014, of the MODIS sensor MOD16A product. The results generated for the irrigated perimeter provided relevant information for decision making of the irrigated agriculture management.
Highlights
The expansion of irrigated areas is often limited by the water availability, what makes it important to search for ways to increase the agricultural production by careful evaluations of the existing irrigated areas
The public domain data obtained by satellite and the scientific development makes the remote sensing an attractive option for irrigation systems management (Bastiaanssen & Bos, 1999; Bos, Burton, & Molden., 2004; Akbari, Toomanian, Droogers, Bastiaanssen, & Gieske, 2007; Rozenstein, Haymann, Kaplan, & Tanny, 2018)
The daily rainfall (DR), maximum temperature (Tmax), minimum temperature (Tmin), insolation (Insol), air relative humidity (RH) and wind speed (U) data were obtained from conventional meteorological station (83395-Janaúba) of the National Institute of Meteorology (INMET), in the following geographical coordinates: 15°78′ S and 43°30′ W, and 516 m altitude
Summary
The expansion of irrigated areas is often limited by the water availability, what makes it important to search for ways to increase the agricultural production by careful evaluations of the existing irrigated areas. The public domain data obtained by satellite and the scientific development makes the remote sensing an attractive option for irrigation systems management (Bastiaanssen & Bos, 1999; Bos, Burton, & Molden., 2004; Akbari, Toomanian, Droogers, Bastiaanssen, & Gieske, 2007; Rozenstein, Haymann, Kaplan, & Tanny, 2018). This spatial information is increasingly important for large irrigated areas, such as the Gorutuba irrigated perimeter
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
