Understanding of phases of hydrological cycle is essential in hydrologic studies. In this sense, this work search analyze the relationship between production and demand for water in Uberabinha watershed, state of Minas Gerais, using water flow data derived from Fazenda Letreiro fluviometric station (National Water Agency - ANA code 60381000), time series from 1976 to 2006 and water demand of the water rights permits, warranted by the government - IGAM. In the statistical treatment of data was used Gumbel distribution for extreme events and mathematical analysis Siscah software. Analysis of the relationship between water production and the volume given shows that the production is insufficient to meet demand. The volume given is 3,4 m³/s, however, statistic analysis of return period indicates that every fourteen years there is a minimum flow rate equal to or less than 3,4 m³/s, confirming the situation of water scarcity in the watershed analyzed. From the results obtained in this work can be concluded that a management plan for water resources is necessary in the study area, thus enabling management of the economics activities water uses and a more effective participation of water users sectors of the watershed.
Uberabinha Watershed; extreme events; water rights permits
