Lower Santa Cruz Basin Study


A portion of the study area; map by Bureau of Reclamation

Lead CCASS Contact: Kathy Jacobs

CCASS is helping to organize and implement a study, sponsored by the U.S. Bureau of Reclamation and Arizona state and southern Arizona agencies, to evaluate the impacts of future changes in water supplies and demands in the Lower Santa Cruz Basin through 2060. This is the first water resources study to incorporate the effects of climate change on regional water supplies and local riparian areas. 

The study’s goal is to identify where physical water resources are needed to balance supplies and demands for municipal, tribal, industrial, agricultural and environmental sectors.  Climate, surface water and groundwater models are being used to evaluate impacts on future water availability.  Study partners and the public are helping to identify alternatives, both structural and non-structural, to adapt to these impacts. 

Partners:  Southern Arizona Water Users Association, Pima Association of Governments, Cortaro-Marana Irrigation District, the Arizona Department of Water Resources, Central Arizona Project, Bureau of Reclamation, and the University of Arizona

Lower Santa Cruz River Basin Study - Project Summary Document

Lower Santa Cruz River Basin Study - Science Summary of Climate and Surface Water Modeling