An Investigation of External Nutrient Loading from Eight Streams into Honeoye Lake
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1 An Investigation of External Nutrient Loading from Eight Streams into Honeoye Lake Finger Lakes Institute 4 th Annual Conference October 18, 2008 Bin Zhu, Ph.D. Research Scientist
2 Surface area 7 km 2 Maximum depth 9.2 m Mean depth 4.9 m Secchi Depth ~4 m Eutrophic
3 Water Quality Ranking Lake Honeoye Canandaigua 1.4 Keuka 3.0 Seneca 7.0 Cayuga 4.4 Owasco (no bacteria) 5.9 (no bacteria) Skaneateles Data from Dr. John Halfman
4
5 Honeoye Stream Sampling Regular Sampling (11) Event Sampling (6) Measure: Water Discharge, TSS, TP, SRP, TKN, NO 3, TN
6 Study Sites July 24, 2008 Affolter, October 22, 2007 May 13, 2008
7 159 W Lake, August 27, 2007 Briggs, August 22, 2007 October 22, 2007 May 13, 2008
8 Events 159 W Lake Briggs
9 Water Discharge Average Water Discharge (cm 3 /s) Regular Discharge Event Discharge Annual Discharge W. Lake Affolter Cratsley Inlet Briggs Bray Trident Times Union
10 TSS - Regular 18 TSS (mg/l) /27/07 7/25/07 8/27/07 9/25/07 10/22/07 11/28/07 2/19/08 3/17/08 4/15/08 5/13/08 6/30/ W. Lake 4 Affolter Cratsley Inlet Briggs Bray Trident Times Union 2 3 1
11 TSS - Event TSS (mg/l) /11/07 10/19/07 1/7/08 2/6/08 3/31/08 7/24/ W. Lake Affolter Cratsley Inlet Briggs Bray Trident Times Union
12 Phosphorus - Regular 0.05 TP SRP 0.04 Mean Phosphorus (mg/l) W. Lake Affolter Cratsley Inlet Briggs Bray Trident Times Union
13 Phosphorus - Event TP SRP Mean Phosphorus (mg/l) W. Lake Affolter Cratsley Inlet Briggs Bray Trident Times Union
14 Nitrogen - Regular TKN NO3 TN Mean Nitrogen (mg/l) W. Lake 3 Affolter Cratsley Inlet Briggs Bray Trident Times Union 1 3 2
15 Nitrogen - Event TKN NO3 TN Mean Nitrate (mg/l) W. Lake Affolter Cratsley Inlet Briggs Bray Trident Times Union
16 TSS Loading 250 TSS Annual Total Loading (tn/yr) W. Lake 4 Affolter Cratsley Inlet Briggs Bray Trident Times Union 1 2 3
17 Phosphorus Loading TP Annual Total Loading (kg/yr) W. Lake Affolter Cratsley Inlet Briggs Bray Trident Times Union
18 Nitrogen Loading 5000 TN Annual Total Loading (kg/yr) W. Lake Affolter Cratsley Inlet Briggs Bray Trident Times Union
19 Rank Summary Table Regular TSS Regular TP Regular TN Event TSS Event TP Event TN Annual TSS Loading Annual P Loading 159 W Lake Affloter Cratsley Inlet 2 2 Briggs Bray Trident Times Union 4 2 Annual N Loading
20 Segment Analysis APT Complex FARM
21 Segment Analysis (TP SRP) Phosphorus (mg/l) TP-Inlet SRP-Inlet TP-Affloter SRP-Affloter APT Complex 0.01 FARM Distance from Streams
22 TSS & Nitrogen - Affloter Nutrient & TSS (mg/l) TSS TKN NOx TN Distance from Affloter Stream APT Complex
23 TSS & Nitrogen - Inlet 1 40 Nitrogen (mg/l) TKN NOX TN TSS TSS (mg/l) FARM Distance From the Inlet 0
24 Conclusions Water discharge, TSS, TP, SRP, TKN, NO3, and TN were much higher during event sampling than regular sampling. Briggs, Affolter,, and 159 W. Lake had the highest concentrations and loading of TSS, TP, and TN. Bray and Trident could also be problematic in terms of their nutrient concentrations and loading.
25 Conclusions It estimates these 8 streams contribute TSS tn/yr, TP tn/yr, and TN 9.44 tn/yr. Segment analysis could identify some possible causes of excessive nutrient loading.
26 Recommendations and Directions Continuous monitoring is necessary One year data can not represent an average trend for a period. Study season (June 07 July 08) covered a large period of dry season; this one year is not typical.
27 Recommendations and Directions More segment analyses should be conducted to identify possible sources for those concerned streams, such as Briggs, Affolter,, 159 W. Lake, and Trident. Internal nutrient cycling should be investigated Sediment resuspension? Macrophyte release? Alum success?
28 Acknowledgements Ontario County Honeoye Lake Watershed Task Force and Mr. Jack Starke for Funding Meridith Eppers,, Joseph Sullivan, Bryan Harris, Kellie Sparford,, Sarah Meyer, and Nathan Burtch for field sampling assistance Dr. John Halfman and Dr. Bruce Gilman for sharing data and discussions. Ms. Marion Balyszak for her support of research and managing the funding
29 Thank You! Photo by Bryan Harris Presentation: Aquatic Plants in the Finger Lakes: Native, Invasive, or Nuisance? (November 11, 2008) Contact me: or
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