Dams and hydraulic Engineering (Flooding management)
- Client: State of Geneva – Department of Water Ecology
- Assignment: Diagnosis, Study and Pre-project phase
- Total cost of the assignment: 30k CHF
- Completion date: 2013-2014
PROJECT DESCRIPTION AND CHARACTERISTICS
The Arve, a tributary on the left bank of the Rhone below Lake Geneva, carries very large quantities of sediments. At the arrival of the Rhone in the reservoir of Verbois (Geneva), these sediments are deposited and fill the restraint. In order to limit sedimentary debris harmful to the environment, studies on the management of sediments accumulating in the Verbois reservoir have been undertaken and have led to defining different sediment management scenarios.
GEOS’s mission was to determine, for each sediment management scenario at the Verbois dam, which areas of Geneva would be flooded in the current state of protection and then design and quantify flood protection measures. The study area extends to the Rhone from the Pont du Mont-Blanc to the junction and to the Arve from the Reichlen dam to the junction.
The study was carried out in the following stages:
- Protection objectives according to the type of object;
- Mapping of areas to be protected;
- Detailed local analysis of areas to be protected and study of flood mechanisms;
- Design of appropriate protective measures (overall and individual structural measures);
- Measurements and calculations.
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A total of 8 vulnerable areas were identified and were the subject of a brief preliminary design study, including the Rhône wharf and the Mont Blanc parking.
ASSIGNMENT
GEOS has carried out the following missions:
- Diagnosis of the existing;
- Study of protective measures;
- Pre-project brief.