1. National Civil Engineering Laboratory, Av. do Brasil, 101, 1700-066 Lisbon, Portugal,
2. CESAM, Department of Physics, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
3. CESAM, Environment and Planning Department, University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal