Modeling Hydrodynamics, Temperature, and Water Quality in Henry Hagg Lake, Oregon, 2000-03 |
By Annett B. Sullivan and Stewart A. Rounds |
Scientific Investigations Report 2004-5261 |
Prepared in Cooperation with Clean Water Services |
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Abstract The two-dimensional model CE-QUAL-W2 was used to simulate hydrodynamics, temperature, and water quality in Henry Hagg Lake, Oregon, for the years 2000 through 2003. Input data included lake bathymetry, meteorologic conditions, tributary inflows, tributary temperature and water quality, and lake outflows. Calibrated constituents included lake hydrodynamics, water temperature, orthophosphate, total phosphorus, ammonia, algae, chlorophyll a, zooplankton, and dissolved oxygen. Other simulated constituents included nitrate, dissolved and particulate organic matter, dissolved solids, and suspended sediment. Two algal groups (blue-green algae, and all other algae) were included in the model to simulate the lake’s algal communities. Measured lake stage data were used to calibrate the lake’s water balance; calibration of water temperature and water quality relied upon vertical profile data taken in the deepest part of the lake near the dam. The model initially was calibrated with data from 2000–01 and tested with data from 2002–03. Sensitivity tests were performed to examine the response of the model to specific parameters and coefficients, including the light-extinction coefficient, wind speed, tributary inflows of phosphorus, nitrogen and organic matter, sediment oxygen demand, algal growth rates, and zooplankton feeding preference factors. |
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Contents Abstract Introduction Purpose and Scope Previous Work Methods Model Description Bathymetric Data and the Model Grid Other Model Data Model Calibration Water Balance Water Temperature Water Quality Sensitivity Analysis Summary Acknowledgments References Cited Glossary Appendix |
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Download the report (PDF, 2.3 MB) (Adobe Reader® required; version 5 or higher preferred.) If you do not have the Adobe PDF Reader, it is available for free download from Adobe Systems Incorporated. Document Accessibility: Adobe Systems Incorporated has information about PDFs and the visually impaired. This information provides tools to help make PDF files accessible. These tools convert Adobe PDF documents into HTML or ASCII text, which then can be read by screen-reading programs that synthesize text as audible speech. In addition, a version of Adobe Reader that contains support for screen readers is available. The conversion tools and the accessible reader may be obtained free from Adobe through their conversion tools Web site. Order a printed copy of this or other USGS water-resources reports. For more information about the Henry Hagg Lake water-quality model, please visit the study Web site. (Contains animations of model results.) To find out more about the USGS in Oregon, please visit our home page. |
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