Hydrology needed to manage droughts: the 2015 European case. Issue 17 (19th April 2016) - Van Lanen, Henny A.J.; Laaha, Gregor; Kingston, Daniel G.; Gauster, Tobias; Ionita, Monica; Vidal, Jean‐Philippe; Vlnas, Radek; Tallaksen, Lena M.; Stahl, Kerstin; Hannaford, Jamie; Delus, Claire; Fendekova, Miriam; et al.