More frequent heat waves and longer and more frequent dry spells are expected worldwide. As well as wetter winters with less but more intense rainfall. Climate change is also expected to affect agriculture in Europe and across the world. Expected effects depend on current climatic, soil and economic conditions. By 2050, the urban areas worldwide are expected to increase and concentrate 66% of the world population according to the United Nations (UN), thus increasing the exposure to flood, increase of surface temperature and frequency of heat waves. The hydrological cycle and water resources regimes are particularly threatened by environmental change. The aim of this thesis is to understand the impact of socio-economic changes in the (i) land use, (ii) climate and (iii) demography at a local scale. This thesis work focuses on developing socio-economic scenarios for the land use, climate and demography of the Black Sea catchment (BSC). As well as policy-driven scenarios of land use for the the Cantons of Vaud and Valais in Western Switzerland, covering the upper Rhône basin.