Now a day all over the world, environmental flows are being assessed for an increasing number of rivers. There has been a progressive evolution of methodologies, ranging from simple hydrological indices to complex, holistic procedures for assessing the EFRs of riverine ecosystems, in which not only the ecological water needs are assessed, yet where also the local demands of human communities along the river are taken into account. In water allocation decision-making process, the interests of the people living along the rivers are often neglected (Meijer, 2003). Possible reasons for this...