Impacto da variabilidade da umidade do solo em cultura de arroz na formação de nevoeiros na região central do Rio Grande do Sul

Abstract

Some characteristics on the surface and atmosphere interact in the fog formation processes. The topography, land use and local and large-scale circulations stand out. The objective of the work is to identify a way to evaluate how rice farming areas act in the formation of fog. To this end, numerical simulations were carried out using the Weather Research and Forecasting (WRF) model. The first simulation, without adding irrigated rice farming areas, was called Control. The other two simulations, Conab and Potencial, considered rice farming areas from the 2009/10 harvest in Rio Grande do Sul and Potencial considers areas where there is potential to be explored for the cultivation of irrigated rice. The results of the simulations were compared to hourly data from automatic stations in the State. And, when comparing the simulated hourly relative humidity with the observed one, it is observed that the increase in the area of cultivated rice, Conab and Potencial, generated an increase in the times of simulated fogs referring to the Control simulation.