River System

Climate change is expected to result in larger temperature increases (anomalies) at high altitudes compared with surrounding lowlands. In the Andes, this may lead to the accelerated retreat of tropical glaciers, the drying of unique neotropical highmountain wetland ecosystems locally known as páramos or bofedales, as well as increased weather variability and weather extremes, all of which will aff ect water regulation. In turn, these impacts may aff ect ecosystem integrity and the economics of power and water supply in the region. Peru is one of the countries that could be aff ected by these changes: it relies on its mountain basins for the provision of over 50 percent of its power, and discharges from upper basins feed water supply and agricultural systems. The objective of the study is to develop a methodology to assess the net impacts of climate change on the hydrological response in mountainous regions. This is done through a case study in the Peruvian Andes. Having access to an...

Research conducted in the Yamé Valley (Dogon Country, Mali) provides valuable information about the river systems and their Holocene evolution in Sudano-Sahelian West Africa. Past research in the region has relied primarily on marine and lacustrine records. The new results confirm correlation between palaeoclimatic fluctuations recorded in both the river system and in tropical African lakes. They offer a new