Yves Travi

TL;DR: In this article, the annual water budget of Lake Tana is determined from estimates of runoff, rainfall on the lake, measured outflow and empirically determined evaporation Simulation of lake level variation (1960-1992) has been conducted through modeling at a monthly time step Despite the ±20% rainfall variations in the Blue Nile basin in the last 50 years, the lake level remained regular.

TL;DR: The sensitivity of each method to changes in input variables is analyzed in order to test the stability of the resulting estimates as mentioned in this paper, which helps discuss uncertainties and possible inter-annual variations of the evaporation rate.

TL;DR: In this article, a daily survey highlights the impact of the origins and trajectories of air masses on the amount and the oxygen-18 content of rainfalls: enriched and higher amount Mediterranean precipitation, depleted and lower amount Atlantic precipitation.

TL;DR: In this article, geochemical and environmental isotope data were used to gain the first regional picture of groundwater recharge, circulation and its hydrochemical evolution in the upper Blue Nile River basin of Ethiopia.

TL;DR: In this paper, a model of basin formation and sediment accumulation for the Ziway-Shala lake basin system is presented to separate the effects of climatic change from environmental variations induced by local or regional factors such as volcano-tectonic forcings.