Alqueva dam and irrigation project: hard lessons learned from good and bad assessment practice João Joanaz de Melo1 & Carla Janeiro2 1 New University of Lisbon (UNL),
[email protected], +351-212948374 2Centro de Estudos da Avifauna Ibérica (CEAI),
[email protected] Abstract The Alqueva dam and irrigation project involves the largest reservoir in Europe and an irrigation network to cover 110000ha of land, with three main goals: water management, regional development and promotion of agriculture. This paper reviews the major impacts and assessment procedures of the project. Lessons learned from this difficult process are discussed. Flooding has already provoked large ecological and social impacts, e.g.: loss of natural and cultural heritage in the Guadiana valley, cutting of ecological corridors, pressure over endangered species such as the Iberian lynx; and the resettlement of hundreds of families. On the plus side, the project created some water management capacity on the Portuguese side of the Guadiana and some local development in a traditionally depressed region. When the project is full-fledged, greater impacts are expected, including water pollution, soil salinization, barrier effect, destruction of wetlands, and possible biological contamination of water transfer from the Guadiana to the Sado basin. However, the resulting economic benefit is expected to be rather low. Local social benefit is expected mostly from public investment. Overall, the enterprise is certainly not sustainable - environmentally or economically. This myriad of problems and opportunities generated a huge amount of information and uncommon assessment procedures, including an observation committee and strategic-level environmental studies. They managed to curb some of the worst impacts of the project, but had little influence on key decisions.