1. Applied Geology and Mineralogy, Department of Earth and Environmental Sciences; Katholieke Universiteit Leuven; Heverlee Belgium
2. Land Management and Natural Hazards Unit, Institute for Environment and Sustainability; DG Joint Research Centre, European Commission; Ispra (Va) Italy
3. Hydrogeology and Environmental Geology, Department of Architecture, Geology, Environment, and Civil Engineering; Université de Liège; Liege Belgium