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* January 2003 *
In 1997, the Bureau of Reclamation (Reclamation) began operating a new temperature control device (TCD) on Shasta Dam that had been installed to improve temperature conditions downstream in the Sacramento River for endangered anadromous fish stocks. The U.S. Geological Survey (GS) developed a version 2, CE-QUAL-W2 model application for Shasta Lake, California in the mid-1990’s as part of studies to evaluate the effects of the new TCD operations in the upstream reservoir. Currently, Reclamation is preparing an Environmental Impact Statement (EIS) for the operation of an enlarged Shasta Reservoir with the TCD. As part of the EIS, the bathymetry of Shasta Lake was re-measured, and now includes bathymetry to elevation 335 m (1100 feet). The CE-QUAL-W2 model has also been updated by the Corps of Engineers, the developer of the model, and is currently in version 3.1. Reclamation plans to utilize tools and elements of the revised Shasta Lake CE-QUAL-W2 model application for other reservoirs in the 17 western states, with the overall goal of transferring this technology to Reclamation. Because both the model version and the bathymetry changed, the existing model application for Shasta Lake needed to be updated and checked for validity of water quality predictions. As of January 2003 we completed our research comparing the validity and calibration of the updated CE-QUAL-W2 models. Based on the results of Temperature output, water surface elevation of the model runs, it was decided to pursue further comparisons of dissolved oxygen and other nutrients with version 2 of the model with the enlarged bathymetry, and comparison of model results between the original version 2 calibrated model and the version 2 model with enlarged bathymetry. In addition, we made modifications to the binary code for an output file utilities to facilitate the implementation with the version 2 model with enlarged bathymetry. It appeared after an extended amount of research and comparisons between model version runs, the updated CE-QUAL-W2 version 2 with the updated bathymetry modeled temperature and water quality just as well as the original calibrated version of CE-QUAL-W2 for Lake Shasta. Publications: Saito L, D’Ambrogi A, Sandelin J. 2003. CE-QUAL-W2 Modeling for Shasta Lake: Conversion of Existing Version 2 Files and Specialized File Utilities to Version 3.1 and Transfer of Revised Application from U.S. Geological Survey to U.S. Bureau of Reclamation. Final Report Prepared for U.S. Geological Survey. Related publications: Saito L, Johnson BM, Bartholow JM, Fontane DG. 2001. Interdisciplinary modeling to assess ecosystem effects of reservoir operations. Pp. 373-377 in Marino MA, Simonovic SP, editors. Integrated Water Resources Management. IAHS Publication no. 272. Oxfordshire (UK): International Association of Hydrologic Sciences Press. Saito L, Johnson BM, Bartholow J, Hanna RB. 2001. Assessing ecosystem effects of reservoir operations using food web-energy transfer and water quality models. Ecosystems 4:105-125. Bartholow J, Hanna B, Saito L, Lieberman D, Horn M. 2001. Simulated limnological effects of the Shasta Lake temperature control device. Environmental Management 27(4):609-626. Hanna RB, Saito L, Bartholow JM, Sandelin J. 1999. Results of simulated temperature control device operations on in-reservoir and discharge water temperatures using CE-QUAL-W2. Lake and Reservoir Management 15(2):87-102. Saito L. 1999. Interdisciplinary Modeling at Shasta Lake. Fort Collins: Colorado State University. Ph.D. dissertation. 341 p. Saito L, Hanna RB, Bartholow JM, Johnson BM. 1999. Linking hydrodynamic and ecological models at Shasta Lake. Proceedings: 26th Annual Water Resources Planning and Management Conference. American Society of Civil Engineers. Saito L. 1998. Spatially explicit scope for growth of Shasta Lake rainbow trout. Chronicle of Instream Flow Activities 2(2): http://www.fort.usgs.gov/products/presentations/scope_for_growth/scope_for_growth.asp Saito L, Bartholow J. 1997. Summary of water temperature calibration for a CE-QUAL-W2 model of Shasta Lake, California. Surface-Water Quality and Flow Modeling Interest Group (SMIG) Feature Article. http://smig.usgs.gov/SMIG/features_0997/shasta_w2.html
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