American Society of Agricultural and Biological Engineers



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STUDY OF THE INCIDENCE OF SOLAR RADIATION IN MONTAINOUS REGIONS OF COFFEE PRODUCTION USING GIS

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  131620839,  2013 Kansas City, Missouri, July 21 - July 24, 2013. (doi: http://dx.doi.org/10.13031/aim.20131620839) @2013
Authors:   W PM Ferreira, C F Souza, E I Fernandez Filho, M F Ribeiro, HOLMER Savastano Júnior
Keywords:   Mountainous coffee production climate solar radiation GIS.

Abstract. In coffee production, the use of specific and popular vocabulary is common and is associated with the cultural diversity of different regions. For the coffee production named “Mountain Coffee”, due to the specific characteristics of the predominant type of relief, it is important to understand the use of terms such as slope or exposure faces called "Noruega" or "Soalheira." This study aims to identify the thermal characteristics of the climate associated with these terms. Using the software ArcGis 10 an elevation (hill) was created in order to reproduce the shading caused by the relief in mountainous regions. A modeling tool belonging to ArcGIS 10 was used for the solar radiation, in order to determine the number of hours of direct solar radiation over the ground for latitudes 0 °, 10 ° S, 20 ° S and 30 ° S in the summer and winter solstices and for the autumn and spring equinoxes. The average, minimum and maximum values were quantified for the number of hours of direct incidence of solar radiation for each of the faces of ground exposure (North, South, East, West). The results show that the lower values of solar radiation occur on the Winter Solstice in the East face and in the West face on the Summer Solstice. However, the different orientations of the exposure faces of the mountain had different thermal characteristics, the SE Noruega Face being the coldest and the NW Face the hottest. The other faces, NE of the “Soalheira” slope and SW of the “Noruega” slope, had milder temperatures. Thus, at the time of implantation of a coffee plantation in a mountainous area, the climatic characteristics of the region must be observed in order to correctly choose the best quadrant for the deployment of the coffee crop, so that the environmental characteristics, especially regarding the altitude, temperature and precipitation, allow the plant to reach its maximum production.

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