Reclamation Information Sharing Environment (RISE)

The Final S&T Project Report provides and overview of the project methodology. Appendix 1 to the Report is a Tracer Study and Hydrodynamic Modeling Guidance Manual, which is the primary deliverable for this project. The Guidance Manual effort was led by the University of Nevada, Las Vegas (UNLV). Appendix 2 to the report was prepared by Reclamation's Technical Services Center (TSC) and describes deployment of Acoustic Doppler Profilers (ADPs) in Lake Arrowhead to gain an understanding of the Lake's water movement. Report Abstract: As reuse water becomes an ever-larger component of water resource planning, issues associated with measuring and modeling the mixing and dispersion of reuse water will become more prominent. Hydrodynamic modeling and tracer studies are required to evaluate and assess risks for indirect potable reuse (IPR) by surface water augmentation (SWA) projects, but technical approaches vary based on locality, reservoir configuration and available information, models used, and local and state regulations. This project included a tracer case study and hydrodynamic modeling of Lake Arrowhead, which was used to develop a guidance manual. The guidance manual provides recommendations to help utilities plan and conduct hydrodynamic modeling and tracer studies for their reservoirs as part of the SWA-IPR evaluation process.