Titre de conférence
ICOMOS 13th General Assembly: Strategies for the World’s Cultural Heritage - Preservation in a Globalised World - Principles, Practices, Perspectives
Résumé en anglais
In southern Arizona and northern Sonora there is a harsh desert region connected by river valleys and ancient cultures. In the midst of this harsh desert, these river systems fed by springs and summer rains create oasis areas for rich agriculture and provided routes to travel north and south from deeper in Mexico. Contact between peoples in the regions is thousands of years old. In the Tucson area some of the oldest corn agriculture is to be found north of central Mexico going back 3,000 years. Major irrigation canals large enough to divert the entire course of the Santa Cruz River were constructed over 1,000 years ago.