On the initiative of UNESCO’s Tehran Office and IHP Iran, the Regional G-WADI Training Workshop on Climate Change Impacts on Water Resources Management in Arid and Semi-Arid Zones was held in Tehran, Iran from 20 to 21 June 2011 with the presence of Chair of IHP Intergovernmental Council, Prof Soontak Lee; Chairman of the Iranian National IHP Committee and Deputy Minister of Water and Waste Water Affairs, Ministry of Energy, I.R. of Iran, Mr Attarzade; Secretary General of the Iranian National Commission for UNESCO, Dr Saeidabadi; Deputy Minister of Jihad Agriculture, Dr Salajaghe; Director of UNESCO Tehran Cluster Office, Mr. Qunli Han; members of the Iranian National IHP Committee and representatives from Afghanistan, China, India, Iran, Japan, Kazakhstan and Pakistan.