[1 November 2012] Tutorial on Hydrogeodesy at the Annual WaterNet Symposium: A special session at the 13th Annual WaterNet Symposium, which was held at the Birchwood Hotel near Johannesburg, South Africa, was devoted to a hydrogeodesy tutorial. About 20 participants were introduced to hydrogeodesy, learned about data assimilation in models and got an overview on Earth observations in support of water resource management. More information on the tutorial is available on the Tutorial web page.