Modeling Workgroup

Phase 7 Model Development

The Chesapeake Bay Program is updating its modeling and analysis tools used in the Chesapeake Bay TMDL. For more information, please visit the Phase 7 Model Development Webpage.

Tributary Summaries

The Chesapeake Bay Program and its partners produce tributary basin summary reports for the Bay’s 12 major tributaries using tidal monitoring data from more than 130 monitoring stations throughout the mainstem and tidal portions of the Bay. These reports use water quality sample data to summarize 1) How tidal water quality (TN, TP, DO, Chlorophyll a, Secchi Depth) has changed over time, 2) How and which factors may influence water quality change over time, and 3) Recent research connecting observed changes in aquatic conditions to its drivers.

These documents can be found on the CAST webpage here. 

Phase 6 Climate Change Modeling Documentation

• Climate Change Phase 6 Modeling Documentation (12.28 MB)

Phase 6 Watershed Model Documentation

The Final Chesapeake Bay Program Partnership Phase 6 CAST and Watershed Model documentation is posted as it becomes available. The documentation is for the time-averaged Watershed Model. CAST is the same as the Model. Creating and running scenarios in CAST is simply using an on-line interface to the Model. The documentation for the Model is the documentation for CAST. Due to the length of the documentation, it is divided into sections. Click on the links below to read through the different portions of the documentation. For more information, please vist CAST model documentation.

 

1. Overview

2. Average Loads
    Appendix 2A: Agricultural Loading Rates

3. Terrestrial Inputs 
    Appendices ABCDG: Terrestrial Inputs
    Appendix 3E: Swine Characterization Study Final Report
    Appendix 3F: Turkey Litter Nutrients
    Appendix 3H: Atmospheric Deposition

4. Sensitivity
    Appendix 4A: Sensitivity analysis of the HSPF AgChem Model
    Appendix 4B: Sensitivity analysis for all land uses

5. DRAFT Land Use
    DRAFT Land Use Appendix

6. Best Management Practices
    Appendix 6A: BMP Expert Panel Protocol
    Appendix 6B: Order of Load Source Change Credit

7. Land to Water

8. Direct Loads

9. Stream to River
    Appendix 9A: Alternate Stream to River Methods
    Appendix 9B: Excluded Reservoir Catchments

10. River to Bay and Temporal Simulation
    Appendix 10A: Ftables and Stations
    Appendix 10B: Calibration Stations
    Appendix 10C: Nutrients and Sediment Calibration Targets
    Appendix 10D: HSPF River Water Quality Parameters
    Appendix 10E: Estuarine Model Linkage

11. Physical Setting
      Appendix 11A: List of Segments

12. Applications

13. Reviews

14. References

15. Errata

The Chesapeake Bay TMDL 2017 Midpoint Assessment

• 2017 Chesapeake Bay Water Quality and Sediment Transport Model (24.81 MB)
• Diagnostics of the Chesapeake Bay Nonattaining Dissolved Oxygen Criteria Segments (6.02 MB)
• Influence of Volkswagen Settlement Agreements on Chesapeake Water Quality (798.5 KB)
• Final Phase III WIP Planning Targets by State, State-Basin, and with Nutrient Exchange Ratios (16.75 KB)

Phase 6 WQSTM Peer Review

This project page is the repository for documents and files related to the peer review of the Phase 6 Water Quality and Sediment Transport Model (WQSTM). Please email Kyle Hinson (khinson@chesapeakebay.net) with any questions you may have.

Documentation

All documentation for the Phase 6 WQSTM can be found in the Draft 2017 documentation and its appendices. Information on key scenarios can also be found in the Phase 6 Key Scenarios pdf file.

Additional Materials

Further attachments contain all the presentations that were presented for the STAC peer review.

• DRAFT 2017 WQSTM Documentation (6.69 MB)
• DRAFT 2017 WQSTM Documentation - Appendix A (4.72 MB)
• DRAFT 2017 WQSTM Documentation - Appendix B, C, and D (6.03 MB)
• Phase 6 Key Scenarios (2.98 MB)
• Attachment A: Lewis Linker - Challenges of the 2017 Midpoint Assessment Addressed by the Water Quality Sediment Transport Model (2.6 MB)
• Attachment B: Carl Cerco - Overall Review of New WQSTM Elements (2.45 MB)
• Attachment C: Carl Cerco - Simulation of G1, G2, and G3 Particulate Organics (1.1 MB)
• Attachment D: Gopal Bhatt - Conowingo Infill Simulation (2.03 MB)
• Attachment E: Ping Wang, Richard Tian, and Carl Cerco - Representation of Sea Level Rise and Tidal Wetland Attenuation (2.8 MB)
• Attachment F: Carl Cerco - WQSTM Representation of Tributaries and Shallow Waters in the Chesapeake (2.12 MB)

Phase 6 WQSTM Peer Review

This section contains resources and publications including prior reviews that may be employed in reviewing the Phase 6 Water Quality and Sediment Transport Model (WQSTM).

• Modeling Subcommittee Response to the STAC Report: Review of the Water Quality Model, 2000 (1.23 MB)
• Chesapeake Bay Hydrodynamic Model Review Summary, 2002 (430.19 KB)
• Review of the Benthic Process Model with Recommendations for Future Modeling Efforts, 2002 (3.81 MB)

Midpoint Assessment

New web page summarizes the priorities and identifies lead researchers for each effort.  The descriptions are brief with links to more detailed workplans.

Chesapeake Bay Bathymetric Volumes

• DOCUMENTATION: Creation of bathymetric volumes for the Chesapeake Bay (260.56 KB)
• MAP: Segment scheme 92 TMDL (1.2 MB)
• DATA: CBSEG92 bathymetric volumes (212.75 KB)

CMAQ Peer Reviews

CMAQ Review Process: During the past three years, CMAS, in collaboration with EPA scientists, has organized two CMAQ review panel meetings etc. The first CMAQ review meeting was held during December 2003. The second meeting was held during May 2005. The review process usually starts by inviting a number of key scientists to participate in the process. The scientists are selected based on their expertise in accordance with the focus of the review session. After reviewing numerous reports and articles and completing their meeting in Research Triangle Park, North Carolina, the review panel prepares a comprehensive report on their findings and recommendations. EPA then responds to the comments of the reviewers. Final review reports are posted below.