One of the major challenges facing the water resources planning community is addressing and assessing the impact of the climate change and variability on the different component of the water cycle. The most influential component of the water cycle for resource management is precipitation, especially its extremes causing floods and droughts. The reliability of projection of precipitations (average, distribution, frequency, intensity) is still less than adequate and limits their usefulness to decision management of the water systems. Aside from the issue of reliability of precipitation projections, which are usually obtained from global or regional climate models (GCM/RCM), there is also the need for estimates at resolutions sufficiently fine for simulating the water cycle at watershed and useful hydrological scales. Therefore there is always the need to bridge the resolution gap between the global or regional and the river basin scale. Moreover the hydrological model outputs are very sensitive to the GCM/RCM biases therefore often bias correction techniques have to be applied before the GCM/RCM output can be used to input the hydrological models. The workshop is composed of one week lectures and laboratory training followed by a second week of laboratory sessions.