Global climate change and hydroelectric power

As part of overall global climate change (GCC), changes in levels and distribution of precipitation will affect the viability of existing and proposed hydroelectric power stations. GCC models predict changes in precipitation in many regions, both in terms of annual mean levels and seasonal variability. Such changes are forecast to be significant in the year 2050 and beyond. In areas where precipitation is reduced, existing hydroelectric installations may require early replacement with alternative sources of power. As economic appraisals of new hydroelectric power projects are normally based on a 60 year (or greater) life, GCC will also necessitate revisions in assessments of potential hydroelectric capacity