1. Automation and Control Group; Confederación Hidrográfica del Ebro; Paseo de Sagasta 24-28, 50071 Zaragoza; Spain
2. Automation and Control Group; SICE; Luis Bermejo 9, 50009 Zaragoza; Spain
3. Control, Dynamics and Applications Group, Department of Applied Mathematics III; Universitat Politècnica de Catalunya Barcelona Tech; Jordi Girona s/n, 08034 Barcelona; Spain