Fig. 3. Organizations intervening in participatory RBM in the Dordogne Basin. The gray areas in the L-shape and O-shape represent the participatory efforts of the Water Agency and EPIDOR, respectively. Although some tensions remain between the two institutions (due to their competing claims to define water policy on the Dordogne), they collaborate regularly in the elaboration of measures and policies (Barraqué et al. 2004). The implementation structure, however, remains under the control of the State (bottom-left corner).