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7 jb task force meeting 10 29-15 keith

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Post Construction Monitoring in Jamaica Bay under the Nitrogen agreement. NYC DEP plan for additional Data collection

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7 jb task force meeting 10 29-15 keith

  1. 1. Overview of the Jamaica Bay Water Quality & Ecological Monitoring Plan October 29, 2015
  2. 2. 2 PRESENTATION OUTLINE • Previous DEP Water Quality and Ecological Studies • Overview of the New Monitoring Program • Description of New Monitoring Program 2
  3. 3. 33 PREVIOUS WATER QUALITY & ECOLOGICAL STUDIES • In 1995/96 HydroQual conducted extensive sampling to calibrate JEM – Physical Measurements (bathymetry, tidal elevations, currents) – Ambient Water Quality Sampling – Sediment Fluxes and Composition – Macroalgae surveys • In 2005/2006 Battelle and EEA conducted extensive water quality and ecological studies: – Water Quality – Nutrients – Finfish Survey – Ichthyoplankton and Larvae Studies – Benthic Studies
  4. 4. OVERVIEW OF NEW SAMPLING PROGRAM • It is a requirement of the First Amended Nitrogen Consent Judgment . • Intended to assess water quality and ecological improvements as a result of ongoing nitrogen reductions to Jamaica Bay • Assessment will also include past studies and historic data. 4 • It was developed as part of a collaborative effort between DEP and DEC in conjunction with a Technical Advisory Group “TAG” that consisted of: ̵ Linda Allen, Ph.D., P.E., NEIWPCC ̵ Anand Kumaraswamy, P.E., NYCDEP ̵ John Marra, Ph.D., Brooklyn College • This post construction monitoring plan was submitted to DEC in June 2015 and approved by DEC in August 2015. • Anticipated to commence in summer of 2016 and sampling will continue for three (3) years.
  5. 5. PHYSICAL AND HYDRAULIC CHARACTERIZATION • Bathymetric surveys of critical areas within Jamaica Bay • Collect additional data on tidal stages and velocities for calibration/validation of hydraulic model 5
  6. 6. WATER QUALITY & SEDIMENT SAMPLNIG • Conduct additional discrete water quality sampling to supplement the existing Harbor Survey Sampling Program • Sampling parameters will include but not be limited to: – Nutrients – Temperature – Salinity – pH – Secchi Depth – Photosynthetically Active Radiation (PAR) – Turbidity • Installation of remote sondes to collect continuous readings • Sediment nutrient flux surveys at 8 locations in the bay – Solid-phase analyses – Pore water analyses – Gas analysis 6
  7. 7. BENTHIC & BIOLOGICAL SAMPLING (1) • Benthic phytoplankton or microphytobenthos” can play an important role in system metabolism within coastal bays • Sediment samples will be collected using a Young grab sampler for laboratory analysis • Surveys will be conducted at fourteen (14) shallow (< 3 m) stations located in six (6) locations distributed around the Bay • Surveys should take place three (3) times per year as follows: early May, July, and mid-September • Benthic invertebrate sampling shall be performed quarterly (February, May, July, October) • Sampling will be performed at twelve (12) locations in the Bay 7
  8. 8. BENTHIC & BIOLOGICAL SAMPLING (2) • Trawl and epibenthic sled surveys shall be conducted at the twelve (12) locations • Each survey shall consist of two days of trawls followed by two days of sled tows, tides and weather permitting. • Water quality (temperature, DO, and salinity) will be measured and recorded at each sampling site, each day of sampling. 8
  9. 9. MACROALGAE & MARSH GRASS SAMPLING • Ulva, a macroalgae, often indicative or nutrient enrichment, has been observed in Jamaica Bay • Ulva samples shall be collected and analyzed for dry weight at 5 locations, with a subset of the samples analyzed for nutrients from May thru October • Intertidal and subtidal Ulva surveys will also be conducted during this same period • Above-ground and below-ground marsh-grass biomass and nutrient- content measurements shall be made • March grass surveys shall be conducted at a total of eight (8) locations from May thru October 9

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