Descriptive analysis and comparison of precipitation curves in Diamantino, Mato Grosso
DOI:
https://doi.org/10.6008/SPC2179-6858.2017.003.0017Keywords:
Descriptive Parameters, Polynomial Regression, FourierAbstract
Rain influences directly or indirectly several social, economic and environmental processes. It is necessary to know the behavior and distribution of rainfall in a given region for a better planning on the use of this resource. In this sense, this work had the objective of analyzing the precipitation behavior of the municipality of Diamantino-MT by means of descriptive statistical parameters and by comparing the performance obtained with polynomial regression curves and Fourier analysis. For that, average monthly rainfall data were used between 1998 and 2014 from the National Institute of Meteorology (INMET). It was verified that the average annual precipitation was of 1951,2 mm with standard deviation of 214,4 mm, with the months of February and March being the rainiest, and the month of July the driest. Rainy season and dry season contributed, respectively, with 85.4% and 14.6% of the total annual precipitation in this period. Using a holdout-type cross validation procedure and the Wilcoxon paired test, we obtained significance levels of 0,785 and 0,551 for Fourier models and polynomial regression, reporting a better performance for the first one.
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