Water and sediment budget of Casiquiare channel linking Orinoco and Amazon catchments, Venezuela Multiscale impacts of anthropogenic and climate changes on tropical and mediterranean hydrology /Laraque, Alain Lopez, J. L. Yepez, S. Georgescu, P. Casiquiare Orinoco Amazon bifurcation hydro-sedimentary budget The Casiquiare River is a natural channel that connects two of the greatest rivers in the world, the Orinoco and the Amazon in the South American continent. The aim of this paper is to present a review and synthesis of the hydrological and sedimentological knowledge of the Casiquiare River, including the first hydro-sedimentary balance of the Casiquiare fluvial system conducted 9-12 September 2000 at the bifurcation and mouth during the expedition 'Humboldt-Amazonia 2000'. Bathymetric flow discharge and physico-chemical measurements were made at the inlet and outlet of the Casiquiare Channel. The main conclusions of this study indicate that Casiquiare is taking a significant proportion of flow (20% to 30%) from the Upper Orinoco basin to the Amazon basin. Throughout its 356 km-course, this chameleon channel undergoes significant morphological, hydrological, and bio-geochemical variations between the inlet and outlet, whose most visible witnesses are the increase in its width (3 to 4 times), flow (7 to 9 times), and its change in water color (white to black water), under the influence of tributaries coming from vast forest plains. /Descroix, Luc (ed.) /Mahé, Gil (ed.) /Laraque, Alain (ed.) /Ribolzi, Olivier (ed.) Lacombe, G. (ed.) 2019 text https://www.documentation.ird.fr/hor/fdi:010077346 fdi:010077346 Laraque Alain, Lopez J. L., Yepez S., Georgescu P., . Water and sediment budget of Casiquiare channel linking Orinoco and Amazon catchments, Venezuela. In : Descroix Luc (ed.), Mahé Gil (ed.), Laraque Alain (ed.), Ribolzi Olivier (ed.), Lacombe G. (ed.), . Multiscale impacts of anthropogenic and climate changes on tropical and mediterranean hydrology 2019, 11 (10), art. 2068 [17 ] EN VENEZUELA