Agustin Robles-Morua, Sonora Institute of Technology, Obregón, Mexico, Javier Navarro-Estupiñan, Instituto Tecnologico de Sonora, Dept. of Water and Environmental Sciences, Cd. Obregón, SO, Mexico, Rolando Diaz-Caravantes, El Colegio de Sonora, Especialidad en Salud Publica, Hermosillo, Mexico and Enrique R Vivoni, Arizona State University, School of Sustainable Engineering and the Built Environment, Tempe, AZ, United States