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TEIZEEN MOHAMEDALI and MATT GROCE Spring 2006

LAKE WHATCOM WATERSHED GENERATING A POTENTIAL NON-POINT SOURCE POLLUTION INDEX. TEIZEEN MOHAMEDALI and MATT GROCE Spring 2006. BACKGROUND. Major drinking water source Watershed development Water quality Non-point source pollution. OBJECTIVES.

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TEIZEEN MOHAMEDALI and MATT GROCE Spring 2006

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  1. LAKE WHATCOM WATERSHEDGENERATING A POTENTIAL NON-POINT SOURCE POLLUTION INDEX TEIZEEN MOHAMEDALI and MATT GROCE Spring 2006

  2. BACKGROUND • Major drinking water source • Watershed development • Water quality • Non-point source pollution

  3. OBJECTIVES • Calculate and develop a potential non-point source pollution index (PNPI) to detect and display areas in the Lake Whatcom Watershed that are most likely to produce NPS pollution. • Identify areas in the Lake Whatcom Watershed which are particularly suitable/unsuitable for development depending on their contribution to NPS pollution. • Evaluate different land management scenarios and their potential environmental impacts given current and potential development. • Effectively communicate results through visual means.

  4. RESULTS INDICATOR LAYERS Land Cover (LCI) – refers to the potential generation of NPS pollution due to land use. Distance (DI) – calculated as the hydraulic distance between each point of the watershed and the lake. Run-Off (ROI) - represents run-off as a function of land cover, slope, and soil permeability. 

  5. RESULTS POTENTIAL NON-POINT SOURCE POLLUTION INDEX (PNPI)

  6. RESULTS PNPI OF CURRENT AND POTENTIAL DEVELOPMENT AREAS Current and potential development shows areas of current and potential development within the Lake Whatcom Watershed.  PNPI for current development shows the potential NPS pollution generated by those areas in the watershed which are currently developed. PNPI for potential development shows the potential for NPS pollution generated by those areas with the potential for development.

  7. RESULTS PNPI CLASSES FOR DEVELOPED AND UNDEVELOPED AREAS

  8. CONCLUSIONS • Strong correspondence between urban areas and high PNPI ranking • Low pollution pressure class areas are generally found in outlying forested areas • Development should occur in areas of the watershed with low or moderately low potential for NPS pollution • Undeveloped areas near the lake are unsuitable for development because of their high potential to produce NPS pollution

  9. If we had more time… • Combine PNPI values with nutrient concentrations to estimate loading rates • Account for streams in the watershed • Build a model to automate/streamline this process for any watershed

  10. QUESTIONS?

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