Stormwater management in urban areas using dry gallery infiltration systems

The increase in the frequency of extreme precipitation events due to climate change, together with the continuous development of cities and surface sealing that hinder water infiltration into the subsoil, is accelerating the search for new facilities to manage stormwater. The Canary Islands (Spain)...

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Bibliographic Details
Published in:The Science of the total environment 2022-06, Vol.823, p.153705, Article 153705
Main Authors: Marazuela, Miguel Ángel, García-Gil, Alejandro, Santamarta, Juan C., Gasco-Cavero, Samanta, Cruz-Pérez, Noelia, Hofmann, Thilo
Format: Article
Language:English
Subjects:
Artificial recharge
Managed aquifer recharge
Numerical model
Unsaturated flow
Vadose zone
Volcanic aquifer
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Summary:The increase in the frequency of extreme precipitation events due to climate change, together with the continuous development of cities and surface sealing that hinder water infiltration into the subsoil, is accelerating the search for new facilities to manage stormwater. The Canary Islands (Spain) are taking advantage of the knowledge acquired in the construction of water mines to exploit a novel stormwater management facility, which we have defined as a dry gallery. Dry galleries are constituted by a vertical well connected to a horizontal gallery dug into highly permeable volcanic layers of the vadose zone, from where infiltration takes place. However, the lack of scientific knowledge about these facilities prevents them from being properly dimensioned and managed. In this work, we simulate for the first time the infiltration process and the wetting front propagation from dry galleries based on a 3D unsaturated flow model and provide some recommendations for the installation and sizing of these facilities. The fastest advance of the wetting front takes place during the earliest times of infiltration (
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2022.153705