Temporal variation of precipitation and flow in 16 mountainous sub-basins of the Manhuaçu River

The objective of this study was to evaluate the temporal variation of precipitation and flow of several sub-basins of the Manhuacu River-MG and to define which would need application of techniques that favor water infiltration into the soil. The study was conducted upstream the municipality of Manhuacu, where the morphometric characterization was carried out in 23 sub-basins; land use classification through LandSat 8 OLI scenes; reference flow of 16 sub-basins was evaluated over 14 months, between May 2018 to July 2019; precipitation was measured by using four local rain gauges. The basin has cover predominance of coffee, 31.06%. Among evaluated sub-basins, those with the greatest temporal variation of flow were the Corrego Fundo, Corrego Palmital, Corrego Manhuacuzinho, and Corrego Sao Sebastiao. The Manhuacu River basin has a large temporal variation flow, with a marked reduction during the winter and a high elevation during the period of intense rains, requiring soil and water conservation techniques to promote the regulation of watercourses, thus reducing floods in Manhuacu.