|
|
|
|
Ecology Publications & Forms |
|
|
|
|
|
Ecology Publications & Forms |
| Title | Puget Sound Nutrient Source Reduction Project. Volume 2: Model Updates and Optimization Scenarios, Phase 2 |
||||
|
|||||
| VIEW NOW |
Puget Sound Nutrient Source Reduction Project. Volume 2: Model Updates and Optimization Scenarios, Phase 2 (Number of pages: 151) (Publication Size: 27226KB)
Appendix A. Modeling Approach, Parameter, and Rate Updates (23 pages) (1MB) Appendix B. Watershed and Open Boundary Condition Updates (141 pages) (11MB) Appendix B3. Time Series Plots of Flow and Water Quality for Watersheds (412 pages) (17MB) Appendix C1. Point Source Water Quality Updates (19 pages) (1MB) Appendix C2. Point Source Inflows and Water Quality (222 pages) (6MB) Appendix D. Miscellaneous (25 pages) (1MB) Appendix E. Model Performance Plots for 2000 (126 pages) (112MB) Appendix F. Model Performance Plots for 2006 (240 pages) (59MB) Appendix G. Model Performance Plots for 2008 (145 pages) (131MB) Appendix H. Model Performance Plots for 2014 (158 pages) (35MB) Appendix I. Sediment Fluxes (51 pages) (7MB) Appendix J. Microalgal Biomass and Primary Productivity (38 pages) (5MB) Appendix K. Microbial Respiration in Bottom Waters (18 pages) (1MB) Appendix L. Initial Optimization Phase 2 (Opt2) Model Scenarios (20 pages) (523KB) Appendix M. Residence and Flushing Times (23 pages) (2MB) Appendix N. Additional Opt2 Scenario Results (6 pages) (4MB) Appendix O. Assessment of Budd Inlet TMDL Open Boundary Load Allocation (8 pages) (1MB) Related Document: Puget Sound Nutrient Source Reduction Project – Optimization Scenarios Phase 1 (53 pages) (8MB)
|
||||
| Author(s) | C. Figueroa-Kaminsky, A. Ahmed, T. Mohamedali, J. Gala, and H. Zulmuthi | ||||
| Description | Multiple physical, chemical, and biological processes influence dissolved oxygen (DO) concentrations in the Salish Sea. DO levels in bottom waters of this region can be naturally low. Embayments and terminal inlets can experience reduced flushing and are vulnerable to lower DO in bottom waters due to anthropogenic nutrient loads. During periods of restricted flushing and little to no vertical mixing, sediment oxygen demand plays a proportionally dominant role in consuming bottom water DO. The Salish Sea Model (SSM) was used to quantify the influence of reducing regional and local anthropogenic nitrogen and organic carbon loads from Washington watersheds and wastewater treatment plants (WWTP) to determine their effects on noncompliance with Washington’s DO standards. Refinements to input load estimates, improved initial conditions, tidal and bottom friction effects, code updates, and limited parameterization modifications improved SSM DO skill performance metrics compared to previous efforts. Results regarding the influence of anthropogenic nutrient loads in lowering DO levels, particularly in bottom waters of vulnerable terminal inlets and embayments, mirror findings from previously published works. DO noncompliance occurs in multiple locations, including portions of Hood Canal, Port Susan, Bellingham Bay, Case, Carr, Sinclair and Dyes Inlets, Quartermaster Harbor, and Penn Cove. Differences in daily DO minimum magnitudes between 2014 reference and existing conditions at noncompliant locations range from -0.3 to -1.3 mg/L, with a mean of -0.3 mg/L DO. Noncompliances in 2014 range from -0.1 to -1.1 mg/L, with a mean of -0.1 mg/L DO. The total estimated noncompliance area in 2014 is 467 km2, excluding certain areas. Watershed and WWTP load reduction scenarios result in zero noncompliances at nearly all locations (99.5%–99.8%, relative to 2014 noncompliant areas). The maximum magnitude of remaining noncompliance is -0.1 DO mg/L (a 90.9% reduction). |
||||
| REQUEST A COPY
|
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.
ADA Accessibility The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188. Visit Ecology’s website for more information. |
||||
| Contact | EAP Publications Coordinator at 564-669-3028 or EAPpubs@ecy.wa.gov | ||||
| Keywords | Salish Sea, wastewater treatment plant, nitrogen, Puget Sound, nutrient loading, dissolved oxygen, watersheds, nutrient loads, nutrient reduction, organic carbon, Salish Sea Model | ||||
| WEB PAGE | Reducing nutrients in Puget Sound | ||||
| RELATED PUBLICATIONS | Title:
Puget Sound Nutrient Source Reduction Project. Volume 1: Model Updates and Bounding Scenarios Quality Assurance Project Plan: Salish Sea Model Applications Salish Sea Model: Ocean Acidification Module and the Response to Regional Anthropogenic Nutrient Sources Salish Sea Model: Sediment Diagenesis Module |
Copyright © Washington State Department of Ecology. See https://ecology.wa.gov/About-us/Accountability-transparency/Our-website/Copyright-information.
|