sequences do not constitute successive, compartmentalized stages. In order for the EIA to serve as an effective decision-making aid for the project developer and its stakeholders, it is necessary to return to the different sequences several times, in iterations. For example, successful design of mitigation measures could possibly result in the removal of all significant impacts; hence a new screening exercise would reveal that there might have been no need to carry out a formal EIA had the mitigation measures been included from the start.
Once again, the EIA must be initiated as early as possible and follow a continuous, progressive and iterative process based on a good knowledge of environmental issues.
IMPORTANT.– Always give priority to avoidance; as mentioned above, avoidance is the only solution that will ensure that the project does not damage the environment and that major issues are preserved.
1.5. The “no net loss of biodiversity” objective: a regulatory obligation for developers, an opportunity for eco-design
According to the Environmental Code, the application for authorization of a project likely to affect the environment must be preceded by an assessment of its environmental consequences. The content of the impact study has just been extensively reformed by a decree and ordinance that reinforce the respect of the hierarchical “avoid, reduce, offset” sequence (ordinance no. 2016-1058 of August 3, 2016, decree no. 2016-1110 of August 11, 2016).
The Act of August 8, 2016 on the reconquest of biodiversity adds to and crowns this normative reinforcement by enshrining the concept of “no net loss of biodiversity” in French law.
From now on, any development project must produce a net neutral balance19 with respect to the losses it will cause to biodiversity in terms of species, habitats, functions and finally ecosystem services.
The impact study is both an approach and a regulatory file:
– the approach is a thorough reflection on the impact of a project on the environment, conducted by the project owner in the same way as they study the technical and economic feasibility of their project;
– the file is the document that explains, in particular for the attention of the examining body that issues the authorization and for the attention of the public, the way in which the project owner has taken the environment into account throughout the design of their project and the measures to which they commit themself to mitigate its impacts.
Regulatory reinforcement now requires a new vision of the development project, not only socio-technical-economic but also ecological, in order to minimize (cancel?) the negative impacts.
These requirements are constantly being reinforced. Even though the controls on the ground are still too weak, it is undeniable that the application of the regulatory framework aiming at a “no net loss of biodiversity” will reinforce the interest towards constructions with a reduced effect on the environment, or even positive ones.
However, a development project exists in response to a functional need that requires a technical response: (i) the function of a breakwater is to protect a port and is adapted to the hydrodynamic actions of the place; (ii) a quay is there to allow the berthing, mooring and loading/unloading of ships and is adapted to the project ship and the transported goods.
This idea should not replace a deleterious business as usual from human activities damaging to the environment, thanks to green washing (fake eco-design) that allows future construction. It is very important to underline here that this approach is to be carried out in parallel with the ARO approach in the impact study.
Therefore, before any integration of the environment into a technical design, it is absolutely necessary to perfectly master the latter. A certain technical virtuosity is required to propose daring technical variants necessary to take the environment into account in the eco-design process.
This is the objective of Chapter 2, which will present a brief review of the technical concepts related to marine structures and the skills that the marine engineer must have.
1.6. Specificities of the environmental assessment related to the marine environment: the “natural” public maritime domain concept
1.6.1. The natural public maritime domain, an essential concept
An important specificity of an eco-design approach in the marine environment is the legal framework attached to it as public property. The natural public maritime domain (nPMD)20 refers to this remarkable, sensitive and coveted space at the interface of land and sea (Figure 1.7).
Figure 1.7. The extent of the natural public maritime domain in France (Article L. 2111-4 of the CGPPP). For a color version of this figure, see www.iste.co.uk/pioch/marine.zip
In France, reflections on its status as a “natural” space are long-standing, dating back to the Edict of Moulins (1566) and to Colbert’s ordinances on the Navy (article 1 of title VII of book IV of the ordinance of August 1681): “The edge and shore of the sea will be considered to be all that it covers and uncovers during the new and full moons, and as far as the great flood of March can extend over the shores.”
This “natural” territorial zoning has been confirmed by jurisprudence, in particular the French Council of State decision which specifies “the limit of the nPMD at the point of the highest seas […] in the absence of exceptional disturbances” (Kreitmann decision of October 12, 1973).
The nPMD cannot be the object of private appropriation. The marine environment is therefore considered as res nullius, belonging to no one, without master or owner, but which can be appropriated in the context of uses (fishing, exploitation of aggregates, energy production, etc.), and its resources res communis, belonging to all citizens, therefore accessible and usable by all.
At the global level, this principle, and the resulting jurisdictional divisions, are a constant in all coastal states (Féral 2011). The roots of this conception of the marine environment can be found in the marine code of Eleanor of Aquitaine (12th century), followed by the claim of the Dutchman Hugo Grotius in 1609, for a mare liberum linked to the objective of free trade at sea. Only the coasts were subject to a special provision for the allocation of their resources and the protection of state borders.
The sovereign power of a coastal state extended pragmatically to what could be defended, that is, 3 nautical miles (1 nm = 1.8 km), or roughly the range of a cannon shot, from the coast. The 1982 Montego Bay Convention (UNCLOS) modified this conception of a sea as a “public asset”.
With the exception of this narrow strip of 3 nautical miles, the rest of the maritime continent was a “free” or lawless zone until the last 30 years. From then on, the “territorial seas” were extended to 12 nm (about 22 km) from the coast, with a contiguous zone of 22 nm where only the right of prosecution of states is exercised, within the framework of customs operations (drugs, human trafficking, etc.). The UNCLOS developed the idea of exclusive economic zones (EEZs21) that reach up to 200 nm from the coastline (Figure 1.8). In the EEZs, states do not exercise formal sovereignty but have the sole right to exploit resources (fisheries
