Avaliação pluviométrica da região do médio curso do Rio Paraíba utilizando krigagem.

Abstract

The Northeast region of Brazil is characterized by the spatial and temporal irregularity of precipitation and the processes of runoff and soil erosion, as well as the high potential for water evaporation due to the enormous availability of solar energy and high temperatures throughout the year. Thus, the Northeast region of Brazil is considered an anomalous region with regard to the spatial and temporal distribution of precipitation throughout the year. The study of the spatial behavior of climatic elements, such as precipitation, air temperature and humidity, are essential tools for agricultural planning and can be better visualized when mapped This work aimed to evaluate and map the rainfall information of the middle course region of the Paraíba River using data between 1912 and 2021 that were homogenized and mapped using kriging. The use of kriging provided satisfactory results in mapping the data obtained where satisfactory results could be achieved with speed and accuracy. The use of geostatistics obtained important information about the estimates related to the kriging interpolation method, being consistent with the local climatological characteristics of the region, both in spatial and seasonal distribution. The use of the non-parametric Shapiro-Wilk hypothesis test was significant, showing good consistency. In the pluviometric evaluation, the temporal distribution of the average annual precipitation had spatial variability of rainfall concentrated in the west/east direction throughout the year, due to the orography of the área.