The following paragraphs aim to describe the complementary tasks to numerical modellings :
- the collecte of the data
- the legislation.
They are presented in boards and should permit to future users to know the guide lines and names of persons to contact to further information.

I-Collect of the data

Here are the necessary data to realise a numerical modelling of an artificial reef. You will find a definition of each element, the description of its main use and its origin.
If you still don't understand any technical terms, please consult our glossary.

I-1 SHOM maps
I-2 Bathymetry
I-3 Oceanographics and meteorogical data
           Compass card
           Swell data
I-4 Sedimentology

 I-1 SHOM maps

This maps are published by the Oceanographics and Hydrographics Department of the Navy (SHOM). They presents the parameters :

• nature of the sea bed with cut indications as s for sand or v for mud (vase in french !).
• the principal accidents of the shore are incated with hachures.
• plan of comparison with the Zero level.  

In France, to know the Zero level in each port in comparison with the general Zero level in Bourdaloue, consult the "Annuaire des marées des côtes de France" published by the Hydrographics department of the Navy.

I-2 Bathymetry

They are level curves. They represent dephts with a scale of 1/1000ème, and sometimes 1/500ème.

Nowadays, the Hydrographics Department of the national Navy tends to develop new ways to acquire data with satellites.

I-3 Oceanographics and meteorological data

This data are relatives to wind and swell. They generally can be obtained easily at the National Mete Center. They are presented as compass cards or as diagrams representing frequency and amplitude of the swell.

I-4 Sedimentology

Notes on the collect of the data  :

It is one of the most important part of the project. 
In fact, it is not the most difficult but it takes a long time and it musn't be under-estimated.
For example, we had benn a bit desapointed when we realised time was going on. We had to think of another solution and when we decided to begin the modellings with imaginary data, we also discovered that using software is not an easy task ...

 II-Legislation

Construction of a reef requires very careful environmental planning and coordination with the community. Modification of the wave field will alter the local current structure and the forces that move beach sand. Safety must be a primary concern; the reef must not present an unusual hazard to surfers and others.

The following paragraphs summarize the laws governing the coastal development and purpose guide lines for a complete project.

II-1 The "littoral" law
II-2 Planification and development
II-3 Impact study
II-4 Organigram

II-1 the"littoral"law

THE "LITTORAL" LAW

The protection and the coatal devolpment are governed by the "littoral" law, complement of the decret of the 25 Août 1979. Its purpose is to promote a specifical politics of development, protection and exploitment. By governing the coastal constructiond, natural and socio-economical patrimony is protected

"La réalisation de cette politique d’intérêt général implique une coordination des actions de l’Etat et des collectivités locales, ou de leurs groupements, ayant pour objet :

• la mise en œuvre d’un effort de recherche et d’innovation portant sur les particularités et les ressources du littoral
• la protection des équilibres biologiques et écologiques, la lutte contre l’érosion , la préservation des sites et paysages et du patrimoine
• la préservation et le développement des activités économiques liées à la présence de l’eau, telles que la pêche, les cultures marines, les activités portuaires, la construction et la réparation navale et les transports maritimes
• le maintien ou le développement, dans la zone littorale, des activités agricoles ou sylvicoles, de l’industrie, de l’artisanat et du tourisme ."

 II-2 Planification and development

SMVM	The government set up a new tool : les schemas of exploitment of the sea (SMVM) . They are exposed to the unicipalities, to the départments and are aprouved by a decret in Government Council. The decret 86-1252 of the 5 Décembre 1986 fixes the objectives.

" - déterminer la vocation générale des différentes zones
- préciser les vocations des différents secteurs de l’espace maritime et les conséquences qui en résultent pour l’utilisation des diverses parties du littoral
- définir les conditions de la compatibilité entre les différents usages de l’espace maritime et littoral."

II-3 Impact study

IMPACT STUDY

It is imposed by the law of the 10 Juillet 1976 relative to the protection of the nature which the total coast  is superior than 6 millions of francs.

L'’étude d'’impact présente une analyse de l’'état initial du site et de son environnement portant notamment sur les richesses naturelles et les espaces naturels, agricoles, forestiers, maritimes ou de loisirs, affectés par les aménagements ou ouvrages.

L'’étude d’impact présente une analyse des effets sur l’environnement, et en particulier sur les sites et paysages, la faune et la flore, les milieux naturels et les équilibres biologiques et, le cas échéant, sur la commodité du voisinage (bruits, vibrations, odeurs, émissions lumineuses) ou sur l’hygiène et la salubrité publique.

II-4 Organigram

To realise a good study of the reef, it is necessary to follow a methodology precised by the law to not forget any parameter. The  following organigram  presents the main steps.

CONCLUSION

We tried to make this guide practical. The glossary and the contacts lists should also help you the futures users.
Cost aspect was delicate to examine because the project is just at its first step. Nevertheless we estimated the reef volume at about 170 000 m3 : quite important to be very careful while choosing the material ...