Preliminary Project for a Rainwater Harvesting Complexe de L'Étoile du Sahel

The Municipality of Barcelona provided technical assistance to the city of Sousse in the management of the water cycle. Mr. Javier Varela and Mrs. Maria José Chesa carried out the assistance from the municipal public enterprise of water resources management, Barcelona Cicle d'Aigua SA, under the coordination of the International Cooperation Department of the Municipality of Barcelona.

Three technical missions were organised during USUDS project in order to:

a) identify the subject of the cooperation and collect all necessary data for a preliminary proposal,

b) engage in technical exchange on the preliminary proposal as well as present experiences and projects related to adequate water cycle management in the city of Barcelona and

c) present the results of this cooperation to the Municipal Council of Sousse and to relevant stakeholders on water management.

The first mission allowed the experts to identify two different subjects of collaboration: the first, regarding an assessment for the design and construction of a Rainwater Harvesting (RWH) System for the Olympic Stadium of Sousse and the second, regarding the exchange of experiences for the creation of a water-related museum in the city of Sousse. Furthermore, it led them to identify some training opportunities for the technical team of Sousse regarding the management of water resources and infrastructure. The technical assistance was then focused on the deposit and reutilisation of rain water.

The remaining subjects were discussed during the second mission carried out in the city of Barcelona through physical site visits and technical meetings.

As a result of this assistance, a document was produced with the following aims:

  • Make a preliminary assessment on the potential use of RWH techniques in the Complexe de L'Étoile du Sahel area.
  • Produce a general description of a RWH system and its main components, including the sizing of components of the RWH and a preliminary budget.
  • Analyse the site feasibility and scoping assessments, covering a range of engineering, environmental and sustainability constraints.
  • Identify subsequent steps, information and actions needed to develop a construction project for the RWH System.

This work was based on the close collaboration between the technical team of the Municipality of Barcelona and that of Sousse through their exchange of data, knowledge and experiences. This technical cooperation has created new possibilities for future long-term collaboration between the two cities, which would build on some of the issues identified in the missions, and has shown the importance of creating shared spaces between technical municipal personnel.