The European Space Agency, in the context of the Scientific Exploitation of Operational Missions (SEOM) programme element, and CNES are organising a sequel event to Hydrospace2007 held at WMO, called 3rd Space for Hydrology Workshop - "Surface Water Storage and Runoff: Modeling, In-Situ data and Remote Sensing", Tuesday 15 - Thursday 17 September 2015, hosted at  ESA-ESRIN, Frascati, Italy.