Filter results by:
Key Findings
Questions we Asked
Geographic Area

Search for the following document types:

What are the historical NBS estimates & how have changes affected lake levels?

The first theme of the IUGLS hydroclimatic analysis involved assessing the validity of existing methodologies used to determine contemporary estimates of the water balance. Although the existing conventional methodologies used for estimating water balance components have proven relatively successful in the past, questions remain regarding measurement uncertainties associated with the principal components of the Great Lakes water balance (i.e., precipitation, evaporation and runoff). To address these questions, the Study sought to improve accuracy and consistency in NBS estimates, including the modification of existing models, development of new models, collection of new data, and improvement of a range of methodologies that have been used for lake level estimation. These analyses were also fundamental to ensuring that any potential future climate outcomes could be understood and attributed to past changes.
Related Projects
New Hydrometric Gauging Stations
Residual NBS
GLERL Component NBS
Direct Observations of Evaporation
Upper Lakes 1860-1899 NBS
Lake Erie Residual NBS Uncertainty
Paleo-reconstructed NBS
MESH Component NBS
Closing the Water Balance using MESH
Component NBS Uncertainty
Closing the Water Balance using Adjusted GLERL Data
Ungauged Daily Streamflow Estimation
Hydroclimate Synthesis and Summary