HR: 1340h
AN: H33D-0503    [Abstracts]
TI: Evaluating the hydrologic and economic impacts of incresed groundwater use in the Yaqui Valley Irrigation District, Mexico
AU: * Addams, L
EM: addams@geo.stanford.edu
AF: Stanford University, Stanford University, Stanford, CA 94305
AU: * Addams, L
EM: addams@geo.stanford.edu
AF: International Research Institute, 61 Rt. 9W PO Box 1000, Palisades, NY 10964
AU: Gorelick, S
EM: gorelick@geo.stanford.edu
AF: Stanford University, Stanford University, Stanford, CA 94305
AB: An integrated hydrological-economic-agronomic modeling framework is developed to address water policy in the Yaqui Valley, a semi-arid agricultural region in northwest Mexico. The modeling framework includes physically-based hydrological and agronomic processes and hierarchical decision-making by water managers and farmers. The hydrologic component consists of (a) a physically-based canal routing model, and (b) a complete, stand-alone three-layer groundwater flow model. The agronomic component represents the yield response of major Yaqui Valley crops to total seasonal irrigation depth and salinity. The economic component is a set of mathematical formulations representing the decision-making processes of (a) groups of farmers (modules), and (b) water managers in the Yaqui Valley. Each Module-Level Decision Model determines crop, irrigation, and pumping levels to maximize single-year profits, subject to land, water, and scheduling constraints. The set of module-level decision models successfully reproduced 1996-2002 Valley-wide crop production, in part due to the underlying spatial variability in yield potential and irrigation efficiency.
DE: 1842 Irrigation
DE: 1884 Water supply
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting