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Net Basin Supply Estimates for the Great Lakes as Computed Using the Component Method by NOAA - GLERL
- Accurate hydrologic data are required for simulation, forecasting, and water resource studies in the Great Lakes system. To address the need for basin-wide estimates of the Great Lakes water balance, NOAA’s Great Lakes Environmental Research Laboratory (GLERL), in the early 1980s, began developing some of the first tools for simulating and forecasting component net basin supplies, i.e., over-lake precipitation, basin runoff and lake evaporation. The approach used by GLERL has been developed over many years (Croley and Hunter, 2008), and represents the first comprehensive attempt to quantify NBS components systematically in all of the Great Lakes. GLERL component NBS for the 1948-2008 period were a crucial piece of information used by the IUGLS in analyzing the water balance and the impacts on Great Lakes levels and flows. As a result of recent studies, GLERL plans to revisit their methods and tools in order to further improve our understanding of the Great Lakes water balance.
- Great Lakes Monthly Hydrologic Data
- Viewable Data:
- GLERL Monthly Component Net Basin Supplies
- GLERL Water Level and NBS Component Time Series
- Additional Data and Information
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- Supporting Content
- Main Topics
- - Hydroclimate Information
- Questions We Asked
- - What are the historical NBS estimates & how have changes affected lake levels?