Ecological services of artificial wetland for pesticide mitigation. Socio-technical adaptation for watershed management through TRUSTEA project feedback
Résumé
Thanks to a R&D research program regarding artificial wetlands (TRUSTEA), we got the opportunity to improve the state of the art, assess the performance of artificial wetlands as ecological services and find economical, legal and social incentives for further nationwide extension. One artificial wetland was tested at pilot scales and an application on a real site is presented. Artificial wetland's test is based on tracer experiment in controlled conditions. Parameters of water and pesticide in and out flows have been measured and monitored. The application is based on the issue of groundwater preservation in a subsurface drained context. We also recorded the conditions of implementation since we were very close to real conditions. For this purpose, inquiries addressing the various actors were carried out by sociologists. The results of the performance regarding pesticide dissipation are shortly given. Sociologic approaches and amenities assessments have revealed unsuspected relations of the farmers with the society and the environment, and vice versa. The implementations have resulted of a co-construction where each actor had personal involvement. Even if co-construction should be a driving line, solutions for appropriate incentives and land reallocation tools should be fought with politics and authorities in order to facilitate further realizations.