1. a Department of Geography, 260 South Central Campus Drive Room 270 , University of Utah , Salt Lake City, UT, 84112-9155, USA
2. b Department of Earth Sciences , University of Western Ontario , London, Ontario, N6A 5B7, Canada
3. c School of Conservation Sciences, Bournemouth University, Christchurch House, Talbot Campus , Poole, Dorset, BH12 5BB, UK
4. d Engineering Institute, Universidad Autónoma de Baja California-Mexicali , BC, México