Environmental Engineering (Renaturation of water courses)
- Client: State of Geneva – Service of Renaturation of Water Courses
- Assignment: Project Management and design
- Total cost of work: 800k CHF
- Total cost of the assignment: 110k CHF
- Completion date: 2012-2014
PROJECT DESCRIPTION AND CHARACTERISTICS
The project consists of restoring the river to a morphology close to its natural state, completely redesigning the banks and the low-flow channel of the watercourse that appeared before as a channel, while making sure to maintain the hydraulic conditions during floods.
The works include:
- Demolition of concrete culvert, creation of meanders to get flow diversity, creation of new wetlands to increase biodiversity and develop biotopes;
- Revegetation of the banks on biodegradable geotextile (coconut mat) – Planting of species corresponding to the plants that are normally encountered in this type of environment in order to accelerate re-greening, to limit risks associated with neophytes and to improve stability of banks and slopes;
- Realization of vegetated wooden caissons with fish shelters;
- Moving the walking path out of the space close to the watercourse in order to respect the function of biological corridor as much as possible;
- Renovation of relaxation and walking areas.
For a 430m renatured reach, about 1,800 m³ of concrete and blocks were removed from the watercourse, for a volume of earthwork of 10,000 m³.
ASSIGNMENT
GEOS has carried out complete management and design of the project, in association with an aquatic environment specialist, including:
- Preliminary study;
- Conceptual design;
- Advanced hydraulic analysis;
- Design of works;
- Procedure for requesting authorization;
- Preparation of the tender documents, bid analysis;
- Detailed design;
- Site supervision.
