Surface Water
Review Of Current Chapter <ul><li>Reviews hydrologic budget information </li></ul><ul><li>Relies on 1999 Montgomery-Watson...
TREND ANALYSIS <ul><li>1985: In general, rainfall of less than 1 inch does not produce significant runoff in the watershed...
Coon Creek at Coon Rapids Bld 1999
Coon Creek at Coon Rapids Bld 2009
Coon Hollow 2009
Implications <ul><li>Lower portion of the watershed (Coon Rapids) remains flashy </li></ul><ul><li>Lower portion of the wa...
Expectations <ul><li>Increased TSS & Turbidity problems in lower watershed </li></ul><ul><li>Increased bank erosion in low...
Questions? Thank You Coon Creek Watershed District
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#6 - Comp Plan - Surface Water

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Transcript of "#6 - Comp Plan - Surface Water"

  1. 1. Surface Water
  2. 2. Review Of Current Chapter <ul><li>Reviews hydrologic budget information </li></ul><ul><li>Relies on 1999 Montgomery-Watson Hydrologic Study </li></ul><ul><li>Focus is on </li></ul><ul><ul><li>Stream Flow </li></ul></ul><ul><ul><li>Flow Variation </li></ul></ul><ul><ul><li>100 year Elevations </li></ul></ul>
  3. 3. TREND ANALYSIS <ul><li>1985: In general, rainfall of less than 1 inch does not produce significant runoff in the watershed. (USGS 1985) </li></ul><ul><li>1999: The fate of rainfall of 1 inch needs to be managed either through infiltration or rate control (Montgomery Watson 1999) </li></ul><ul><li>2009: Water levels increase substantially per inch of rainfall (ACD 2009) </li></ul>
  4. 4. Coon Creek at Coon Rapids Bld 1999
  5. 5. Coon Creek at Coon Rapids Bld 2009
  6. 6. Coon Hollow 2009
  7. 7. Implications <ul><li>Lower portion of the watershed (Coon Rapids) remains flashy </li></ul><ul><li>Lower portion of the watershed exhibits “initial localized independence” from the remainder of the watershed </li></ul>
  8. 8. Expectations <ul><li>Increased TSS & Turbidity problems in lower watershed </li></ul><ul><li>Increased bank erosion in lower watershed </li></ul>
  9. 9. Questions? Thank You Coon Creek Watershed District

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