Title: Flood Prevention Action Programme from the Bresle estuary to the Authie estuary
Client: Syndicat Mixte Baie de Somme – Grand Littoral Picard and Communauté de Communes Opale Sud
Partners / Donors: Artois-Picardy Water Agency, Somme Departmental Council, Picardy Regional Council, Picardy and Nord - Pas-de-Calais Regional Directorates for the Environment, Planning and Housing, Artelia
State of progress: On-going (expected to be completed in September 2015)
A few words on the project…
The Syndicat Mixte Baie de Somme - Grand Littoral Picard commissioned Artelia to carry out a concerted Flood Prevention Action Programme from Le Tréport to Berck in order to obtain a comprehensive action strategy for the medium and long terms in relation to flood and erosion risks.
The aims of the programme are to ensure a coherent approach in the coastal region and hinterland in response to changing risks, define shared local flood-management strategies, reduce the consequences of flooding, build the capacity of project Owners, and optimise and rationalise public resources.
The area concerned by the programme covers 360 km², 80 km of coast, 3 administrative departments and 160 communes. The risk of flooding, the state of the protection systems, the retreat of the coastline and the effects of climate change threaten this stretch of coast, which nevertheless has major environmental and human assets.
Artelia set up a multidisciplinary team of risk technicians, economists, urban planners, environmentalists and specialists in consultation procedures to pool their skills in order to propose a strategy at both the overall and local levels, with a shared vision for this extensive territory. Based on high-performance, innovative techniques and methods and on a decision-aid tool (multi-criterion analysis), the study provides stakeholders with a solid basis for predicting changes in their area over the next 50 years. It provides lasting solutions for shared risk management in a spirit of regional solidarity, including the withdrawal of human activities if necessary and the maintenance – or even improvement – of overall development capacity throughout the region.
The introduction of this decision-aid support is based on:
- A complete assessment of the region going further than what is normally required for a programme of this kind (knowledge of hazards, of coastal dynamics, of flood and submersion protection systems and of management measures), including disciplines describing the natural and human environments: sociology, urban planning, economics, ecology and the environment, hydrogeology, geology, geochemistry, hydrology, geomorphology and water quality.
An action strategy drawn up with all the stakeholders concerned on the basis of a consultation process lasting more than a year. This strategy is being deployed throughout the region and at local level, in homogeneous sectors.
Strengths of project
Leading-edge multidisciplinary expertise associated with knowledge of the region were the project team’s major assets. Technical coordination provided answers to the questions raised by stakeholders, while the multi-criterion analysis provided them with decision-aid. The project was organised with a view to providing stakeholders with leading-edge technical expertise to ensure optimum sharing of knowledge, stakes and risks within their vision of regional development. Consultation ensured the emergence of a strategy based on solidarity and the ultimate coherence of the region.