Interfaces Between Traditional Urban Drainage
Systems And Water Resources:
Case Study – Rio Tavares And Morro Das
Pedras Watersheds, Florianópolis, Brazil
Author(s)
E. Pacheco & A. Finotti
Abstract
This study identified and systematized the interfaces between traditional urban
drainage systems and water resources with the aim of providing decision-makers
with the scientific and technical knowledge required to develop an integrated
urban water management strategy. After the collection of technical documents on
the sanitation infrastructure of the Rio Tavares and Morro das Pedras
watersheds, in Florianópolis, Brazil, the stormwater drainage system of the
region was mapped and the environmental characterization described, dividing
the two basins into 6 regions for analytical purposes. The systematization of the
documents resulted in a synthesis map generated by cross-checking
the information regarding the current drainage system, the hydrography, and the
vulnerability of the Campeche aquifer (DRASTIC and GOD methods), thus
revealing the interfaces between stormwater management and surface and
groundwater resources. The diagnostic phase identified the use of structural
measures for the straightening and/or channelization of parts of the river. In the
analyzed orthophotos, flooding points were observed downstream of
the watersheds. The stormwater effluents are discharged, without any
pretreatment, into the mangroves and sandbanks, or infiltrate through the
drainage pipe, creating points of contaminant injection in the Campeche aquifer.
This study suggests the creation of a unified database for the drainage network,
hydrography and urban infrastructure, as well as the standardization of projects
by means of sanitation, water resource, and stormwater management plans.
Furthermore, qualitative and quantitative monitoring projects for water resources
Keywords
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