Dynamic and maintenance of water purification ecosystem service in the Guandu River Hydrographic Region, Rio de Janeiro, Brazil

ABSTRACT The present study aimed to develop a methodology for analyzing the dynamics and maintenance of water purification ecosystem service in bodies Guandu River Hydrographic Region, responsible supplying Rio de Janeiro Metropolitan characterized by presence transfers low levels effluent treatment. this occurs through an flow, influenced volume that moves from one region another. consisted reviewing studies flows, building database, classifying impacts on hydrological planning units similarity dendrogram, indicators related demands availability these units, developing flow diagram purification. effects were also analyzed comparison between real scenario (which considers existing hydraulic infrastructure) natural disregards it). results showed worst situation is western part region, it requires more than double withdrawn supply local population industry.