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Marine Reach. LSJR TMDL BMAP 2013 Annual Progress Report: Trends in Nutrients and WQ Targets. Freshwater Reach. John Hendrickson, SJRWMD Wayne Magley, Ph.D., FDEP Sharon Piltz, FDEP. Dissolved Oxygen Monitoring Stations. LSJR Mainstem BMAP Monitoring Approach & Objectives. Talleyrand. - PowerPoint PPT Presentation
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LSJR TMDL BMAP 2013 Annual Progress
Report:Trends in Nutrients
and WQ Targets
John Hendrickson, SJRWMDWayne Magley, Ph.D., FDEP
Sharon Piltz, FDEP
Marine Reach
Freshwater Reach
Talleyrand
WBID 2213L
WBID 2213K
Long-Term River Monitoring
Dissolved Oxygen Monitoring Stations
USGS Dames Pt.
FDEP
LSJR Mainstem BMAP Monitoring
Approach & Objectives
Racy Pt.
Dancy Pt.
Whetstone Pt.
• Combine interagency & multi-platform data to describe river condition, processes
• Assess river water quality trends, processes, and targets achievement
• Maintain ongoing data acquisition for future WQ model applications and adaptive management
The Q Half of Load, 2013
Black Creek Flooding - Photo from Florida Times Union - Jacksonville.com
LSJR 2013 Bloom
Shands Pier Ramp 10/1/2013 SE Doctor’s Lake, 10/1/2013
Hibernia Pt. 8/12/13
Hibernia Pt.
Mandarin Pt.
Piney Pt.
Marine
Interface 4
/28
Marine Interface 5/20
LSJR Upstream and Freshwater Reach Nutrient Trends 1995 - 2013
TN Low Flow Med. Flow High FlowOct-Mar 0.059 <0.001 <0.001Apr-Sep <0.001 <0.001 0.017
TP Low Flow Med. Flow High FlowOct-Mar 0.796 0.405 0.302Apr-Sep 0.026 0.053 0.378
2013 Mean = 1.15 mg/L
2013 Mean = 0.056 mg/L
TN Low Flow Med. Flow High FlowOct-Mar 0.005 0.233 <0.001Apr-Sep <0.001 0.002 0.002
TP Low Flow Med. Flow High FlowOct-Mar 0.085 0.567 0.031Apr-Sep 0.001 0.326 0.965
2013 Mean = 1.18 mg/L
2013 Mean= 0.088 mg/L
Racy Pt (WBID K)
St. Johns River Longitudinal N and P TrendSJRWMD Status and Trends
2013 Report
LSJR TMDL Freshwater Reach Chlorophyll-a 40/40 Target
Compliance
TN Low Flow Med. Flow High FlowOct-Mar 0.01 0.003 0.808Apr-Sep 0.005 0.106 0.957
TP Low Flow Med. Flow High FlowOct-Mar 0.912 0.908 0.969Apr-Sep 0.995 0.834 0.958
Marine Reach Nutrient TrendsAssessed at RM 17 (WBID D)
TN TP N:P
Trends in LSJR Oligohaline
Chlorophyll-a, N and P
*Research suggests that blue-greens thrive under low N:P ratios
Hibernia Pt.
Mandarin Pt.
Piney Pt.
Trends in Marine Reach Dissolved Oxygen
USGS Continuous Monitoring Station at
Dames Point
Dissolved Oxygen Monitoring Stations
USGS Dames Pt.
FDEP
• Since 2008, no exceedences of the marine reach DO criteria• Format of LSJR DO criteria now adopted as State-wide Estuarine criteria
LSJR Marine ReachDissolved Oxygen Target Compliance
LSJR Indicators of Eutrophication Post-TMDLWhat DoTrends Indicate?
• Downward trends in N, P (under low flow) and chlorophyll-a, and increase in D.O., concur with TMDL findings and demonstrate effectiveness of nutrient load reduction in improving WQ
• Divergence in flow condition trends consistent with point source reduction exceeding nonpoint reduction
• Effect of recent meteorological conditions on the proportions of point and NPS load has moved FW worst-case WBID downstream, may be altering the composition of algae blooms