Integrated Flood Management Case Study
This text presents the lessons learned from the Flood Management in Iguaçu River. The usual approach would be to increase the Iguaçu river capacity to cope with the 50 or 100 year flood. Under these conditions the population would occupy the floodplain because of the flood frequency decrease just after the works. After a few years the development of the upstream basin will change the hydrograph and increase the flood frequency and peak of the floods. In this future scenario there will not be more space for the increase of the section width, since the flood plain would be occupied. In this scenario the flood control could be done only by dikes (with pump station and internal drainage) or deepening the river by a reach of at least 50 km, which represents high cost. This is the scenario occurred in the Metropolitan Region of São Paulo and the cost of deepening the channel was evaluated in more than a billion dollars in 1986!
Resource collections
- Floods
- Learning from crises
- UN Habitat - Urban Response Collection
- Urban Response - Urban Crisis Preparedness and Risk Reduction
- Urban Response Collection - Community Engagement and Social Cohesion
- Urban Response Collection - Economic Recovery
- Urban Response Collection - Environment and Climate Change
- Urban Response Collection - Housing, Land and Property
- Urban Response Collection - Urban Crisis Response, Recovery and Reconstruction
- Urban Response Collection - Urban Resilience