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Baltimore LTER

Baltimore LTER. Nutrient and Bacterial Fluxes in Urban Watersheds of the Gwynns Falls, Baltimore, MD. Belt, K. T. 1 , P. M. Groffman 2 , L. Band 3 , N. Law 3 , and G. T. Fisher 4 .

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Baltimore LTER

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  1. Baltimore LTER Nutrient and Bacterial Fluxes in Urban Watersheds of the Gwynns Falls, Baltimore, MD. Belt, K. T.1, P. M. Groffman2, L. Band3, N. Law3, and G. T. Fisher4. 1 US Forest Service/Baltimore Ecosystem Study, 2 Institute of Ecosystem Studies, 3 University of North Carolina, 4 US Geological Survey

  2. Urban Land Use Change

  3. Stream Temperatures…Base & Stormflow

  4. Suburban vs. Forested Watersheds

  5. Urban Forested The Urban Hydrograph

  6. Stream Storm Drain Outfall & Gage 42” 36” Storm Drain Conduits 18” 36” 18” Drainage Boundary Storm Drain Conduit Manhole Access Inlet & Catchbasin

  7. Channel Incision I. Natural Channel with Connected Riparian Zone Stream Water Table II. Channel with Incision Due to Increased Runoff • Channel Erosion • Nonfunctional Floodplain • Dry Riparian Soils

  8. Gravity Sewers… Interwoven with Fluvial Systems Main Line Interceptor Feeder Lines

  9. Sewer Leakage Paths to Streams h Feeder Line Stream Main Sewer Interceptor Pipeline

  10. Civil infrastructure becomes part of the stream system The Urban Hydrologic System Artificial Channels Stormdrains Water Supply Impervious Surface Septic Systems Groundwater Stream Wastewater

  11. McDonogh Weir Rognel Hts Storm Sewer Carroll Park Main Channel

  12. Urban Watersheds with More Baseflow?

  13. 2 3 1 Nitrate In the Urban-Rural Gradient

  14. Urban…Greater Annual Runoff

  15. Annual Nitrate Yields

  16. Annual Phosphate Yields

  17. A Little Leakage…Goes a Long Way

  18. Restoration Objectives…Multiple Choices

  19. Pathogens in Urban Watersheds Fecal Coliforms are used as indicators of sewage contamination…but

  20. Disproportionate Impacts…Public Health Issues ?

  21. Glyndon: 80 % of Nitrogen is Missing… Input: Fertilizer, 21.5 23.5 Input: Atmospheric Deposition ? 8.5 Where did it go? Monitoring Station Output: Measured Loads in the Stream 6.5 Kg/ha/yr

  22. Researchers Lawrence Band Ken Belt Mark Colosimo Peter Groffman Neely Law Gary Fisher Institutions IES Forest Service Johns Hopkins UNC NRCS USGS Students/Techs Alex Kalejs Jessica Hopkins Nate Forand Evan Grant Alan Lorefice Steve Kenworthy Alysia Perry Emilie Stander Amanda Thimmayya Ian Yesilonis

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