PPG - Ecologia e Evolução
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Navegando PPG - Ecologia e Evolução por Autor "Brito, Felipo Meireles de [UNIFESP]"
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- ItemBens e serviços ecossistêmicos da Bacia Hidrográfica da Represa Guarapiranga: análise da evolução histórica e valoração ambiental, entre os anos de 1986, 1996 e 2010(Universidade Federal de São Paulo, 2015-09-30) Brito, Felipo Meireles de [UNIFESP]; Semensatto Junior, Decio Luis [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)The ecosystem functions can be considered goods and services when they serve to generate and maintain the human activities and well being. However, the economic markets generally neglect the participation of those services because the unavailability of data or ignorance of their nature and dynamics. Among the essential services to human life, are those related to water availability and quality. In this study, the water supply of Guarapiranga Reservoir (São Paulo Metropolitan Region) was analyzed temporally in terms of the assessment of the maintenance of water quality, considering the impacts of changes in land use in the watershed. In this sense, the Defensive Expenditures Method (DEM) was employed. The results show that the reduction in vegetation cover is significantly correlated to the increase in the average dose of reagents for treating raw water from public supply, and a reduction of the vegetation increased the cost of water treatment, generating significant externality to the system users. The environmental valuation in 1996 was estimated in U$ 927,536.25 and in 2010 U$ 6,624.543.78. Even taking into account that the present values are underestimated, the management of the metropolitan reservoirs should consider this scenario, so that the conservation of water sources will be strengthened as a state policy and effectively executed with the participation of society.