“…Besides containing biophysical characteristics, a river basin exhibits an ensemble of socioeconomic and political-administrative scales [7,9,13]. Stakeholders can create, constrain and shift scales to suit their own interests [9,10,12,13]. The choice of scale may reflect the social, political and economic context [9], and changing power and authority, as different spatial levels equate to differences in access to resources, data interpretation, assessments, knowledge, decision-making and policy implementation [9,12].…”