Flood defense strategy at the confluence of the Parana-Paraguay rivers

DEPETTRIS JJ,; MENDIONDO EM,; NEIFF, J.J.; ROHRMANN HR,

River Flood Defence

Herkules Verlag Kassel

Lugar: Kassel; Año: 2000; p. 23 - 41

To satisfy public demands for integrated flood defences in the Chaco Province, Argentina, a survey on the right bank of the confluence of the Parana and Paraguay rivers was undertaken during the 1998 extreme ENSO flood when the peak discharge was 48248 m3s-1 and the stage level 2 m higher than bankfull condition. When the banks were over-spilled downstream of the confluence, the flood inundated a flood plain more than 15 km wide. Singular hydrodynamics and non typical conditions were outlined due to human land use in the flood plains of the Chaco Province: dikes, roads, bridges and temporary flood defences with dams frontal to the flow current. New guidelines of land use on floodplains are defined by the regulation. Indeed, ongoing non-structural measures and interdisciplinary initiatives of Argentine?s Nation and Provinces are adopted to cope with non-stationary risk conditions as a consequence of changing return periods of the floods. Integrated research and development efforts by the university, the applied and administration centres tend to find a link multi-sources of information, in order to manage, to conserve and to restore these South American flood plains by flood defence strategy.