Great Salt Lake Integrated Model
Model development and updates
The Great Salt Lake Integrated Model (GSLIM), commissioned by GSLAC and developed in conjunction with state resource management agencies, was built to aid resource managers and policymakers in understanding how climate, population, land use, and water use in the GSL watershed might impact the GSL ecosystem and its uses. GSLIM, initially completed in 2017, was updated and enhanced by Jacobs through an interactive process including Utah state agency staff, GSLAC members, and stakeholder feedback with an updated version completed in 2019. The core outputs from GSLIM include forecasts of GSL lake elevation and salinity based on varying characteristics of the GSL watershed.
To enhance the understanding of the sensitivity of GSL’s water levels and salinity to potential changes in its watershed, GSLAC commissioned a study to use GSLIM to forecast lake conditions under several possible future scenarios combining different population, climate, and water use patterns. These effects are characterized in the study’s executive summary and final report developed and written by Jacobs.
Consequences of Declining Water Levels
To better understand the implications that could result from continued declining water levels at Great Salt Lake, the Great Salt Lake Advisory Council commissioned two reports:
The first report, “Consequences of Drying Lakes Around the World,” examines eight lakes with similar characteristics to Great Salt Lake. It found that drying lakes result in billions of dollars of economic losses, require extensive mitigation efforts and pose severe threats to human health and the environment.
- Consequences of Drying Lakes Around the World,” February 15, 2019, prepared by AECOM Final Report (2 MB)
- Summary Report (3 MB)
The second report “Assessment of Potential Costs of Declining Water Levels in Great Salt Lake,” synthesizes information from scientific literature, agency reports, informational interviews, and other sources to detail how and to what extent costs could occur at sustained lower lake levels.
- Assessment of Potential Costs of Declining Water Levels in Great Salt Lake, prepared by ECONorthwest and Martin & Nicholson
- Executive Summary
Water for Great Salt Lake
In response to an observed long-term decline in Great Salt Lake water levels, in 2017, GSLAC, in cooperation with SWCA Environmental Consultants, compiled a list of potential strategies to increase or maintain water delivery to Great Salt Lake. Strategies were solicited and submitted anonymously or without attribution. This document is intended to facilitate a discussion of potential strategies to maintain or increase the surface elevation of Great Salt Lake. The list is not exhaustive, but reflects an attempt to compile a wide range of strategic options. No ranking or prioritization was completed as part of the compilation process. Inclusion in this document does not constitute an endorsement of any individual strategy by GSLAC or its members. These strategies are ongoing topics of discussion for GSLAC.
Great Salt Lake Health and Economic Significance
During 2011, the Great Salt Lake Advisory Council commissioned two reports to provide information that will aide the council in advising the Utah administrative and legislative bodies on the sustainable use, protection, and development of the Great Salt Lake.
The two major reports and the name of the contractor that led the effort were:
- Definition and Assessment of Great Salt Lake Health led by SWCA Environmental Consultants and Applied Conservation
- Economic Significance of the Great Salt Lake to the State of Utah led by Bioeconomics Inc.
Final Reports were submitted to the Council at the January, 2012 Work Meetings. Please click on the links below to view the fact sheets and final reports: