"Nassica" rainwater network
Vila do Conde, Portugal
Henup - Investimentos, SA
In the ambit of the expansion of the Nassica Complex in Vila do Conde, it was necessary to study the passage of the pluvial waters of a significant area, of approximately 53ha. Verifying the elevated presence of water involved, and that these could not be conducted to the public drainage system, two solutions were envisioned. The first solution consisted of conducting the water into a small stream of existing water and the second solution consisted of conducting the water to the sea, via a pipeline leading into the sea.
According to the subsequent analysis of CCDRN, it was concluded that the solution that would be adopted would be the second one.
The Project of the pluvial collector, with 1500mm in diameter, in course, lead to the elaborate studies in Marco-scale and predicts the execution of a collector on soil (2200m) and a sea agent (500m). After the study, it was verified that a bathymetry and the deep sea nature created more difficulties in the definition of a trace that would be both technically and economically acceptable. Taking into consideration the presence of rock, there are two possibilities being studied. These are either the creation of a micro-tunnel and the execution of a collector carved into the rock at an inferior depth.