Avaliação da disponibilidade hídrica na bacia do Rio Pungué para empresa FIPAG na cidade da Beira

Abstract

Water availability is the flow that can be used in the various consumption and development activities of society, without compromising ecological demand. This work has the main research focus, to evaluate the water availability in the Pungué basin for public supply in the city of Beira, seasonal influence on water availability and current and future demands regarding users. In this context, in order to reach the objectives outlined, the hydrological method (Permanence Curve) was selected in a historical series of hydrological data of monthly flows over a period of 6 years in 3 hydrometric stations, monthly flows captured in FIPAG and of the different users of the basin (watering of the cattle, rural population and Açuçareira de Mafambisse), to support the construction of the permanence curve and the calculation of water availability referring to minimum permanence flows (Q 95 ). The research results demonstrate that the minimum flow of permanence of the basin under study is 2.88 m 3 /s, meeting the current demands sufficiently (2.38 m 3 /s). Therefore, a direct relationship between precipitation and flow in the summer and winter seasons was also verified. As for the future demand of users, there was an increase (2.32 m 3 /s) according to the growth rates of economic activities, which will be above the minimum flow (Q 95 ). In this context, in the future, the water availability of the basin will be insufficient to subsidize the environmental requirements and to satisfy the needs of users, mainly with regard to abstraction of water for public supply in the city of Beira (TRADUÇÃO NOSSA)