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Bernie Engel Larry Theller Youn Shik Park Purdue University Title 2012 July 27-28, 2012

Title. Bernie Engel Larry Theller Youn Shik Park Purdue University Title 2012 July 27-28, 2012. Flow and Load Duration Curves Simple, quick, and statistical approach Cumulative frequency of historic data over a specified period.

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Bernie Engel Larry Theller Youn Shik Park Purdue University Title 2012 July 27-28, 2012

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  1. Title Bernie Engel Larry Theller YounShik Park Purdue University Title 2012 July 27-28, 2012

  2. Flow and Load Duration Curves • Simple, quick, and statistical approach • Cumulative frequency of historic data over a specified period *USEPA, 2007. An approach for using load duration curves in the development of TMDLs. U. S. Environmental Protection Agency

  3. To plot FDC and LDC manually: Collection of Flow and WQ dataset:a. Manual observation through long-term monitoringb. Flow data from USGS with WQ data from EPA, USGS or Local Organization Handling the dataset collected:a. Combining flow and WQ datasetb. Unit conversion (e.g. mg/l to pound)c. Rearranging chronological data into flow frequency-based datad. (if need) Preparing LOADEST inputs and execution Plotting FDC and LDC:a. Plotting graphsb. Calculating annual loadsc. Calculating required reduction for each flow regime

  4. Web-based LDC Tool and STORET/WQX

  5. To plot a Load Duration Curve (LDC), two data sets are required. One is water quality (WQ) data,and the other one is flow data. This table is for WQ data. This table is for flow data.

  6. How can WQ data be prepared ? Option 1. Download the data from EPA, and upload it. Option 2. Find the location on Google Maps, then it will give USGS WQ and flow simultaneously. Option 3. Upload your file. Option 4. Use EPA STORET Data Warehouse Option 5. “Copy and paste” the data from spreadsheet.(e.g. Microsoft Excel)

  7. Option 1. EPA WQ data Upload the downloaded file. Select WQ parameter.

  8. Option 2. USGS WQ data Select WQ parameter and select period in the following page.

  9. Option 3,5. Upload the file or “Copy and Paste”

  10. Option 4. Use of Water Quality Portal

  11. Option 4. Use of Water Quality Portal

  12. Option 4. Use of Water Quality Portal User Side Purdue WQP Parsing to ‘Water Quality Data Table’ Map-based UserInterface (HTML/CGI) STORET Data Warehouse Location DB Web Services Request (CGI) with “Organization ID” and “Monitoring Location ID” WQP Web Services WQ Data Handling (CGI)

  13. Option 4. Use of Water Quality Portal New Window

  14. Option 4. Use of Water Quality Portal 1. Find the location, and then select one station. 2. Click the button to request WQ data to WQP. 3. Select WQ parameter.

  15. Example: Web-based LDC Tool, STORET/WQX, and LOADEST

  16. Preparing WQ data: Select State and County New Window

  17. Preparing WQ data: Find the station

  18. Preparing WQ data: Select WQ parameter

  19. Preparing WQ data: Confirm WQ data selected The WQ selected is formatted to “Date Time Value”.

  20. Preparing WQ data: WQ data in the “Water Quality Data Table”

  21. Preparing Flow data: Click “Opt. 1 USGS Gage Location Tool”

  22. You don’t see anything on the map ?

  23. Preparing Flow data: Find the station

  24. Preparing Flow data: Flow data in the “Flow Data Table”

  25. Flow data checking by FDC module If the dataset has “missing data” or “negative values”, FDC module shows them.

  26. Set options Select the period to plot FDC and LDC. Set additional options.

  27. Results before LOADEST Execution

  28. LOADEST Execution Running LOADEST may take time. Fill out your e-mail address here; the tool will send an e-mail when LOADEST is finished.

  29. LOADEST Execution The tool shows LOADEST progress.

  30. Results after LOADEST Execution

  31. Question ??

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