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Revised Core Model

Revised Core Model. Ben Cope, representing the agency modeling team June 25, 2009. Model Update Process. Quality Assurance Project Plan in February issues of concern to stakeholders included data submitted by stakeholders considered Modelers’ Workshop in February

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Revised Core Model

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  1. Revised Core Model Ben Cope, representing the agency modeling team June 25, 2009

  2. Model Update Process • Quality Assurance Project Plan in February • issues of concern to stakeholders included • data submitted by stakeholders considered • Modelers’ Workshop in February • Draft Core Model Report in March • 3 Conference Calls • Month delay in project to do additional work • Final Core Model Report - June 11th • All model files are posted and available

  3. Tasks Accomplished • Combined calibration for Idaho and Washington reaches • Assessed two years for calibration (2000 & 2001) • Used variable stoichiometry • better tracking of discharge constituents • Used latest groundwater inflow data • Reviewed issues • wind direction • algae settling rates • algae characteristics

  4. Many Comparisons with Measured Water Quality

  5. Example : Lake Spokane 2001 Summer Dissolved Oxygen Segment 187 Segment 174

  6. Are we done with the core model? • Yes…the core model is finished for the proposed TMDL • New information could lead agencies to refine the core model prior to the final TMDL, such as: • new data that conflicts with existing model setup • discovery of errors (e.g., data entry error) • modelers find significantly better calibration with a different set of model parameters or assumptions

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