Communication à un colloque
Résumé : Reaching the good status required by the EU Water Framework Directive (WFD) 2000/60/EC in the Scheldt basin constitutes a sizeable objective, since it aims at reviving and restoring one of the most polluted rivers in Europe.To this end, the human pressures have to be reduced in a sustainable and equitable way. Most of the time, a cost-effectiveness analysis is applied on a general package of pollution reduction measures without taking into account the origin of the main pressures highlighted by a DPSIR approach. This fact is the opposite of the sustainability concept, as it can lead to the selection of measures on the fringe of the pollution. A DPSIR approach applied in the Scheldt basin is used in this paper to point out the causes of the diffuse and point nutrient pressures and to put forward scenarios of measures to reduce them. As the effectiveness of these measures is described in previous papers, this paper focuses on the direct cost valuation of these measures as well as on the current context allowing or preventing their implementation. The study shows that point pollution control measures which are taken end-of-pipe are very expensive. On the contrary, measures taken before diffuse pollution occurs are less costly. Amazing though it may seem, these ones are not necessarily the most encouraged and/or applied. It points out the need for complementary tools such as awareness raising and economic incentives.