Sunlight and Solar Radiation in Different Geographical Zones of the Aburrá Valley

Abstract

The topographic relief of the Aburrá Valley generates variable climatic conditions throughout its territory, which are not taken into account in urban planning decisions. The objective of the research was to establish differences in sunlight and radiation in different areas, define factors that influence its variability, and propose alternatives for different conditions. Nine blocks on slopes and plains were selected and modeled, in three strips of the valley, and simulations were made using computer programs to define microclimates in terms of sunlight and radiation. It is concluded that: there are important climatic differences between the eastern and western slopes and the plain; solar radiation on the roads is reduced, depending on their orientation and tree planting; the municipalities to the south have a better performance in radiation attenuation; radiation on the façades to the west differs by up to 29%; and the streets in the east-west direction have more solar radiation time per day on average.