The advantages of implementing the temporary drainage system in the control of erosion processes and silting of water bodies.

Ticiana Risden Viana, São Paulo State Environmental Agency, São Paulo, SP, Brazil
Topic Area
Stormwater and Water Quality Management in Transportation

The aim of this paper is to present, through case studies related to the follow-up of civil constructions of the extension of Carvalho Pinto Road (SP-070), Campinas' Ring Road (SP-083), duplication of João Baptista Rennó Road (SP-225) using the photographic material collected in technical inspections of the Environmental Agency of São Paulo - CETESB, the advantages of implementing the temporary drainage system before and after the earthwork, as well as show the impacts caused by the lack control measures against erosive and silting processes.

The activities of earthworks, excavations, demolition of buildings, removal of pavements and perforations made for the implantation of civil constructions together with the natural susceptibility of the lands in which the works are inserted, increase the potential of triggering and intensification of erosive processes. The erosive processes in works have high potential of generation of unconsolidated material in conditions of being contributed to the water courses located in the surroundings of the works. The silting up of watercourses in turn may lead to changes in water quality, implications related to water abstraction for public or private water supply, increased turbidity in water, floods and inundations.

The request during the environmental licensing process for the implementation of a temporary drainage system composed of disciplinary devices and rainwater containment devices and structural sediment containment devices in front of the civil constructions, especially near rivers, streams, creeks and their riverbeds, aiming at controlling the processes of erosion and silting.

The main obtained results are: use of simple materials such as geotextile and sacks, and excavation of drainage channels of rainwater and containment basin, since they are applied in a suitable way, check the efficiency of adopting a temporary drainage system in the control of erosion processes and silting of water bodies.

Abstract Keywords
drainage system