Without exception, global warming affects the water resources in Korea. Several climate change projects have been initiated for future water resources assessment but have produced very different projections with a significant range of heterogeneities. Therefore, it is necessary to develop a standard procedure and scheme that can reduce this heterogeneity.

As confirmed recently by the Intergovernmental Panel on Climate Change, climate change already exists with wide ranging consequences. Europe is as affected as all other regions of the world. Management responses

Climate change impact on water resources is uncertain. This article reviews water resources changes during the past 50 years in China, as well as the modelled results under different scenarios, to figure out a basic framework on the relationship between climate change, water resources and water resources management.

Many climate change impact studies have been conducted using a top-down approach. First, outputs from global circulation models (GCMs) are considered which are downscaled in a second step to the river basin scale using either a statistical/empirical or a dynamic approach.

Impacts of climate change on hydrology are assessed by downscaling large scale general circulation model (GCM) outputs of climate variables to local scale hydrologic variables. This modelling approach is characterized by uncertainties resulting from the use of different models, different scenarios, etc.

Climate change and global warming pose serious problems for sustainability of a sound human life. There have been many natural disasters such as floods, droughts, glacier collapses, typhoons, etc.