Hidrograma de cheia em duas bacias hidrográficas no cerrado mineiro

Abstract

The monitoring of water resources has been increasing in recent years in large and medium-sized basins which have an extensive database of flow and precipitation and are also where the main water resources of the country occur. On the other hand, hydrological monitoring in small waterhseds is scarce, which makes rain and flow research difficult. There are different methods that estimate the maximum flow rate as the hydrograph. In this context, the objective of this work is to estimate the maximum flow through hydrographs due to two methods of effective precipitation, being ϕ and SCS, in the Glória and Água Vermelha Watersheds, both located in Uberlândia - MG. The results obtained using these methods were compared with the maximum flow values observed in 12 hydrograms obtained in the Glória Stream Experimental Hydrographic Watershed and 13 hydrograms in the Água Vermelha Stream Experimental Watershed. The results from the hydrographs in the two watersheds show that, in general, the two models were able to adequately estimate the hydrographs due to the rainfall events analyzed, and it was commonly observed that the peak flow through the ϕ index and SCS was very close with that observed in the basins. It was observed a predominance of higher maximum precipitation intensities for the Glória Stream Experimental Hydrographic Watershed, because the rainfall duration in this basin was lower and thus helping to understand the reason ϕ index higher than those obtained in the Water Stream Experimental Hydrographic Watershed Água Vermelha.