http://lattes.cnpq.br/3464588746647505; SASAKI, Jessica Kaori.
Resumen:
Low Impact Development Techniques (LIDs) are stormwater management strategies that can
reduce the negative effects of urban sprawl. However, the evaluation of LIDs has only been
carried out in the context of the environmental benefits, although these benefits are
fundamental, the financial aspects are paramount when choosing an ideal LID device system.
In this sense, the objective of this work is to rank different arrangements for the application of
Low Impact Development techniques for decision making in the management of urban
rainwater drainage in a semi-arid region, considering the environmental and economic
aspects. For this, the application of different scenarios of infiltration trenches and permeable
pavements in the Riacho do Prado basin, located predominantly in the city of Campina
Grande-PB, seat of the homonymous municipality with semi-arid climate and located in the
Brazilian Agreste mesoregion was analyzed. . The Storm Water Management Model
(SWMM) software was used to carry out the hydrological and qualitative modeling of the
waters of the basin and the multi-criteria and multi-decision analysis methods, PROMETHEE
II and Copeland, respectively, to prioritize the scenarios with LIDs, considering the
environmental criteria and economical. From the critical conditions found in the Riacho do
Prado basin, two sub-basins were chosen to model six different scenarios, with the application
of permeable pavements and infiltration trenches in 50% and 100% of the sidewalks. The
simulation of these scenarios showed great potential in reducing runoff volumes and in the
qualitative treatment of drainage water, with the scenarios with the application of both
techniques simultaneously being the ones with the best performance. According to the multi criteria and multi-decision analysis, it was possible to build a hierarchy between the scenarios,
enabling the manager to have a comprehensive view of the environmental and financial
benefits of implementing these techniques. Scenario 5, which proposes the simultaneous
application of the two LIDs in 50% of the sidewalks, despite not presenting the best
environmental performance, due to its financial benefits, was elected as the best management
alternative, considering the criteria of economic and environmental sustainability. This
scenario showed a reduction of 9.11% in peak flow, 14.73% in the total volume drained and
removal of 13061.79 kg of BOD, 25025.97 kg of COD and 356.32 kg of FT.