Climate change is expected to modify the hydrological cycle and affect freshwater resources.

UNESCO: Social and Human Sciences

Science plays an important role in our response to global issues such as climate change, the hydrological cycle, biodiversity loss, natural hazards and human-induced disasters, population growth, land-use change, migration and urbanisation.

UNESCO: UK National Commission for UNESCO :: Environmental Science

Furthermore, water availability must be understood within the context of the hydrological cycle, which is influenced by multiple factors, trends, uncertainties and the associated risks that extend beyond a narrow sectoral focus.

UNESCO: World Water Assessment Programme (WWAP)