2013 Water Quality Assessment Update Ed Sherwood Tampa Bay Estuary Program 263 13 th Ave. South St. Petersburg, FL 33701.

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Presentation transcript:

2013 Water Quality Assessment Update Ed Sherwood Tampa Bay Estuary Program th Ave. South St. Petersburg, FL 33701

Annual Decision Support Process Annual report card for Tampa Bay Annual report card for Tampa Bay Specific to each of the 4 major bay segments Specific to each of the 4 major bay segments Provides for adaptive management of a sentinel estuarine indicator (seagrass) Provides for adaptive management of a sentinel estuarine indicator (seagrass) Reduce Nitrogen NitrogenLoadsReduce Chloro- Chloro-phyll IncreaseWaterClarity IncreaseSea-grassCover

FDEP Recognized Site Specific Thresholds for Chlorophyll-a to Maintain Tampa Bay Reasonable Assurance Hillsborough Bay:15.0 ug/L Hillsborough Bay:15.0 ug/L Old Tampa Bay: 9.3 ug/L Old Tampa Bay: 9.3 ug/L Middle Tampa Bay: 8.5 ug/L Middle Tampa Bay: 8.5 ug/L Lower Tampa Bay: 5.1 ug/L Lower Tampa Bay: 5.1 ug/L If any one bay segment exceeds these values in 2 straight years, then additional compliance assessment steps are required by the TBNMC and TBEP.

Bay Segment Meeting FDEP Threshold? Bay Segment Chlorophyll-a(ug/L) 2013Average FDEP RA Thresholds Old Tampa Bay Hillsborough Bay Middle Tampa Bay Lower Tampa Bay Year Old Tampa Bay Hills.Bay Mid. Tampa Bay Lower Tampa Bay 1975No Yes 1976No Yes 1977No 1978 Yes 1979No Yes NoYes 1985No Yes 1986No Yes 1987NoYesNoYes NoYes 1990NoYes No 1995 Yes No 1999Yes NoYes 2004NoYes 2005 No 2006Yes NoYes NoYes

Chlorophyll-a

Summary of Results Water quality in Tampa Bay continues to be within management targets & regulatory thresholds; chlorophyll-a and water clarity conditions are supporting seagrass expansion in the 4 main bay segments. Water quality in Tampa Bay continues to be within management targets & regulatory thresholds; chlorophyll-a and water clarity conditions are supporting seagrass expansion in the 4 main bay segments. Seagrass acreage in Tampa Bay continues to increase, next update anticipated in early Seagrass acreage in Tampa Bay continues to increase, next update anticipated in early Work continues on developing the integrated model for OTB; 2012 RA Update Accepted by FDEP in April 2013 Work continues on developing the integrated model for OTB; 2012 RA Update Accepted by FDEP in April 2013

Questions?

Science-Based Assessment Rely on long-term ambient water quality stations sampled by EPCHC Rely on long-term ambient water quality stations sampled by EPCHC 45 fixed stations have been monitored since fixed stations have been monitored since 1974 Annual averages developed from chlorophyll-a & secchi disk depth measurements Annual averages developed from chlorophyll-a & secchi disk depth measurements

Management Framework Bay segment annual average values compared to established bay segment targets for chlorophyll-a and water clarityBay segment annual average values compared to established bay segment targets for chlorophyll-a and water clarity Results of each comparison placed into decision matrix frameworkResults of each comparison placed into decision matrix framework Overall management response determined for each bay segmentOverall management response determined for each bay segmentGreen “Stay the course;” partners continue with planned projects to implement the CCMP. Data summary and reporting via the Baywide Environmental Monitoring Report and annual assessment and progress reports. Yellow TAC and Management Board on caution alert; review monitoring data and loading estimates; attempt to identify causes of target exceedences; TAC report to Management Board on findings and recommended responses needed. Red TAC, Management and Policy Boards on alert; review and report by TAC to Management Board on recommended types of responses. Management and Policy Boards take appropriate actions to get the program back on track.

Light Attenuation

Year Old Tampa BayHills.Bay Mid. Tampa BayLowerTampaBay 1976Red Yellow 1977Red 1978 Yellow 1979Red YellowRed 1984 GreenRedYellow 1985Red Yellow 1986RedYellowRedGreen 1987RedYellowRedGreen 1988YellowGreenYellowGreen 1989RedYellowRedYellow 1990RedGreenRedYellow 1991GreenYellow 1992 GreenYellow 1993 GreenYellow 1994 Red 1995 YellowRedYellow 1996 GreenYellowGreen 1997YellowGreenRedYellow 1998Red 1999YellowGreenYellow 2000Green Yellow 2001 GreenYellow 2002 Green 2003RedYellowGreenYellow 2004RedGreen Yellow 2005Green Yellow 2006Green YellowGreen Yellow 2009 Green RedGreenYellowGreen BaySeg-mentChlorophyll-a(ug/L)Light Attenuation (m -1 ) ResultingManage-mentResponse2013TBEPTarget2013TBEPTarget OldTB8.7* Green Hills.Bay Green Mid.TB Green LowerTB Green 2013 Results *Less than a small magnitude exceedence

Additional Background Slides

2012 & 2013 Chlorophyll-a Spatial Distribution

2011 & 2012 Chlorophyll-a Spatial Distribution

2010 & 2011 Chlorophyll-a Spatial Distribution

2009 & 2010 Chlorophyll-a Spatial Distribution

2008 & 2009 Chlorophyll-a Spatial Distribution

Questions?

Tampa Bay Chl-a ( ) Significant Pyrodinium blooms occurred in the summer of 2008, 2009 and 2010 Significant Pyrodinium blooms occurred in the summer of 2008, 2009 and 2010

2010 Seagrass Estimates All TB segments showed increased acreage All TB segments showed increased acreage Upper bay segments still have room to “grow” Upper bay segments still have room to “grow”

TBEP Nitrogen Management Strategy Reduce Nitrogen NitrogenLoadsReduce Chloro- Chloro-phyll ReduceLightAtten-uation Sea- grass Recover

Reducing Nitrogen Loads Tampa Bay Nitrogen Management Consortium formed in 1996 Tampa Bay Nitrogen Management Consortium formed in 1996 Collectively accepted responsibility to reduce TN loads to Tampa Bay Collectively accepted responsibility to reduce TN loads to Tampa Bay TN loads are capped at levels appropriate to maintain bay water quality for seagrass expansion TN loads are capped at levels appropriate to maintain bay water quality for seagrass expansion ReduceNitrogenLoads

TBEP Nitrogen Management Strategy Reduce Nitrogen NitrogenLoadsReduce Chloro- Chloro-phyll ReduceLightAtten-uation 2006: First-time All Segments Meet TBEP Management Targets Sea- grass Recover 1998: NMC Partnership Formed to “Hold the Line” : NMC Projects Preclude >430t N / yr 2010: RA Accepted & Adopted by FDEP, N Load Allocations Voluntarily & Proactively Developed :Demonstrating RA Compliance & Providing Input on Criteria Development 2012:RA Update Completed!

Management Framework Bay segment annual average values compared to established bay segment targets for chlorophyll-a and light attenuationBay segment annual average values compared to established bay segment targets for chlorophyll-a and light attenuation Results of each comparison placed into decision matrix frameworkResults of each comparison placed into decision matrix framework Overall management response determined for each bay segmentOverall management response determined for each bay segmentGreen “Stay the course;” partners continue with planned projects to implement the CCMP. Data summary and reporting via the Baywide Environmental Monitoring Report and annual assessment and progress reports. Yellow TAC and Management Board on caution alert; review monitoring data and loading estimates; attempt to identify causes of target exceedences; TAC report to Management Board on findings and recommended responses needed. Red TAC, Management and Policy Boards on alert; review and report by TAC to Management Board on recommended types of responses. Management and Policy Boards take appropriate actions to get the program back on track.

2011 Chlorophyll-a Temporal Distribution

2011 Kd (Light Attenuation) Temporal Distribution

Observed Seagrass Gains & Losses