Les zones tampons humides artificielles pour réduire les pollutions des nappes par les pesticides issus des réseaux de drainage : une innovation en marche ?

Abstract

Pesticides carried off by surface runoff or tile drainage system can be mitigated through “buffer zones” such as buffer strips and constructed wetlands. Buffer strips can be qualified as successful innovations since they switched from an experimental stage to their adoption in the regulatory texts and by the farmers. Constructed wetlands, still at the experimental stage in France, have required a compromise between a technical optimum and the requests of the farmers to be implemented for a first time. From an ex-post perspective for buffer strips and an ex-ante evaluation for constructed wetlands, this study analyses their transition from the concept phase to their appropriation by users. Those two devices follow each a different deployment approach but the implementation of a binding regulation, still not established for constructed wetlands, is the common denominator.