Transcript Mod4/5 - Stream Ecology
Module 4 and 5 Stream Ecology
Detecting Nutrient Impacts on Stream Water Quality Case Study- Cape Fear River, North Carolina
Module 4/5 Stream Nutrients – Cape Fear River
Background: These slides present: 1 . background information on the Cape Fear River, N.C. and Tischer Creek, Duluth, MN for the purpose of discussing stream nutrient chemistry analysis in lab (only Cape Fear as of 5-16-03) 2. Specific techniques for students to review in or out of class (packaged as separate slide file from Modules 8/9 and 10/11 that cover Lab techniques for lake and stream surveys) 3. Note: There will be accompanying information in the form of
pdf, rtf and .doc files of a lab lesson handout(s) and supporting info
pdf, rtf and .doc files of analytical methods for a suite of water quality parameters (see notes on slides for further information)
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Developed by: R. Axler Updated: May 2003
Features
Largest NC river system 9000 sq. mi.
Importance –industry, transportation, recreation, drinking water, aesthetics Estuary – nursery for fish crabs, shrimp >1.5 million people •
Multi-agency monitoring program led by UNC-Wilmington
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Data animation concept initiated by Rich Huber (UNC- Wilmington)
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DVT developed by Norm Will et al. (NRRI WOW) Water Resource / Quality Issues
human wastewater swine and poultry wastewater logging row crop agriculture industrial wastewater >280 permitted point sources urban stormwater U1-m4/5-s3
Developed by: R. Axler Updated: May 2003
Lower Cape Fear R. in SE N. Carolina Major river system
• 1995-2002 monthly data available at www.uncwil.edu/cmsr/aquaticecology/lcfrp • full Annual WQ reports also on web with interpretation by UNC-Wilmington scientists
River Run DVT:
• animates date either as a time series for 1 site (out of 15) or upstream to downstream at one date • T, DO, pH, salinity, EC, turbidity, fecals, NO3, NH4, TN, ortho-P, TP, chlorophyll-a
Developed by: R. Axler Updated: May 2003
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freshwater ocean estuary
Developed by: R. Axler Updated: May 2003
• salinity 0 – 30 ppt • variable DO, fecals, NH4 N, TP, … • many dramatic events in Aug-Sep U1-m4/5-s5
Hurricane Bonnie
STORM EFFECTS
•Salinity •DO •Fecals •Turbidity • nutrients September 1998 – Some things went up and some went down
Developed by: R. Axler http://www.uncwil.edu/riverrun/index.html
Updated: May 2003
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So what happens nearly every Aug Sep in N. Carolina ?
Hurricanes ! Bonnie in Sept ’98 Other hurricanes or gales
Bertha Developed by: R. Axler Updated: May 2003 Fran
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A closer look at early September 1998
Hurricane Bonnie hit on Aug 26, 1998 Here is Aug’98 : pre-Bonnie DO colored Developed by: R. Axler Updated: May 2003 ----station gradient ---
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Another look at the DO record straddling Hurricanes Fran, Bonnie and Floyd Cape Fear River Fran Bonnie Developed by: R. Axler Updated: May 2003 Floyd
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Developed by: R. Axler Updated: May 2003
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