A simulation model of Hohokam canals, beginning with water flow through an extensive canal system and continuing through agricultural productivity and labor demands for canal construction and maintenance. The simulation pairs an extensive database of plant characteristics (especially water need) and a variety of alternative histories with a database of the results from each simulation run, and allows users with valid logins to construct experiments and share the results among themselves easily while maintaining a complete audit trail from input to output. Key questions being explored include how the demands of cropping schedules and labor coordination across the extensive canal system were managed given the challenges inherent in the flow of water through a complex canal system. The simulation has been funded through a grant from the McDonnell Foundation.