Padrão das chuvas na bacia hidrográfica experimental do córrego do Glória, Uberlândia/MG

Abstract

Understanding the main patterns of temporal distribution of precipitation makes it possible to execute studies and works in engineering and agriculture. The variation of intensity during the rain is one of these important characteristics. However, little information is known about rainfall patterns in Brazil, due to the lack of rainfall data with small intervals in time. This work aimed to determine the convective rain patterns observed in the Experimental Watershed of Gloria Stream (BHEGL), in three proposed patterns. Rainfall data with a 5-minute interval were provided by four control points within the BHEGL, namely: the Gloria Stream Hydrographic Station (HGL), the Gloria Stream Watershed Meteorological Station (MGL), the Rainfall Station 1 of the Gloria Stream Watershed (PGL1) and the Glória Stream River Basin (PGL2) Rainfall Station 2, covering the period from 2016 to 2022. The rains were classified in advanced, intermediate and late pattern, according to the position of the peak of maximum intensity. Of the 637 individual convective rains analyzed in HGL, 1074 in MGL, 646 in PGL1 and 859 in PGL2, the patterns intermediate, advanced and late, corresponded an average of 58.85; 24.55 and 16.35% of the total rainfall, consecutively. This characterizes the intermediate pattern as the most frequent rainfall pattern in BHEGL.