Water-Quality Monitoring Strategy for the Taunton River Basin, the Taunton River Estuary, and Mount Hope Bay, Southeastern Massachusetts
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Water-Quality Monitoring Strategy for the Taunton River Basin, the Taunton River Estuary, and Mount Hope Bay, Southeastern Massachusetts Northeast Aquatic Biologist Conference February 27, 2019 Dave Armstrong, Alana Spaetzel and Jason Sorenson New England Water-Science Center U.S. Geological Survey, Northborough, MA Current USGS/MassDEP Monitoring Objectives: 1. Determine concentrations and loads within two of the State’s larger watersheds (Connecticut and Taunton River basins) Planned USGS/MassDEP Taunton Estuary and Mount Hope Bay Monitoring Objectives: 2. Support DEP review of marine dissolved-oxygen criteria 3. Assess waterbody compliance to water-quality standards 4. Delineate salt wedge in Taunton estuary 5. Estimate nutrient loads into Taunton estuary 1. Concentrations and loads from upper Taunton River basin • MassDEP signed a Joint Funding Agreement (JFA) to support the MAQW network (started in January 2019) • Phase I: 8 locations to be sampled: 4 in the Connecticut basin and 4 in Taunton basin 1. Concentrations and loads from upper Taunton River basin • Nineteen (19) stations were identified in 17 of the 27 major basins in Massachusetts that would provide information on contaminant loads from 67 percent of the total land area of the State. • Additional stations added as part of Phase II and III for a total of 25 sample locations 1. Concentrations and loads from upper Taunton River basin • Nineteen (19) stations were identified in 17 of the 27 major basins in Massachusetts that would provide information on contaminant loads from 67 percent of the total land area of the State. • Additional stations added as part of Phase II and III for a total of 25 sample locations 1. Concentrations and loads from upper Taunton River basin • Many discontinued USGS stations with partial and continuous flow and WQ records available in Taunton basin Segreganset River Taunton River 1. Concentrations and loads from upper Taunton River basin • List of analytes • Monthly fixed frequency sampling • EWI sample by wading or from bridges • Isokinetic sampling when stream velocity is greater than 1.5 ft/sec 2. Support DEP review of marine dissolved-oxygen criteria • MassDEP funded 2 MHB buoys to collect data that could be used to help develop a marine DO methodology for Massachusetts. • The buoys expand URI and RIDEM’s Narragansett Bay Fixed-Site Monitoring Network into the MA portion of Mount Hope Bay. Cole Taunton Buoy Buoy Objective: Data to refine assessment methods for marine DO The draft marine DO criteria requires continuous data collection to assess: intensity, frequency, and duration of DO conditions Additional continuous monitoring data is needed to: • Assess how well the Cole and Taunton buoys represent DO conditions in Mount Hope Bay • Provide more vertical resolution of DO conditions in the Bay, and • Assess DO conditions in the Taunton River Estuary, and in the Cole and Lee River estuaries 4.8 2.9 2017 Provisional data subject to change Objective: Data to refine assessment methods for marine DO The draft marine DO criteria requires continuous data collection to assess: intensity, frequency, and duration of DO conditions Additional continuous monitoring data is needed to: • Assess how well the Cole and Taunton buoys represent DO conditions in Mount Hope Bay • Provide more vertical resolution of DO conditions in the Bay, and • Assess DO conditions in the Taunton River Estuary, and in the Cole and Lee River estuaries An additional goal of the network would be to provide accurate data to help track future hypoxic events and evaluate effects of WWTF upgrades that are expected to reduce nutrient loadings to the Bay. Objective: Data to refine assessment methods for marine DO (A) Buoys collecting (B) Deploy arrays of Temp and DO loggers (Temp, Cond, Salinity, TDS, The PME miniDOT Loggers measure pH, DO, Turbidity, Chlorophyll a) dissolved oxygen and temperature. (C) Vertical water column profiles (Temp, Cond, salinity, and DO) Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government." Objective: Data to refine assessment methods for marine DO • Locations for data collection – considered areas where data had been collected historically. For example, by the Coastal Systems Laboratory of the School of Marine Science and Technology (SMAST) University of Massachusetts – Dartmouth during 2004-2006 Objective: Data to refine assessment methods for marine DO Two additional buoys in Mt Hope Bay, between the Cole and Taunton Buoys, and in the lower Taunton Estuary (between the Somerset and Fall River WWTF’s) New buoy stations should include data collection at bottom and mid depths X X RI Buoy Proposed X New Buoy site SMAST site (2004-06) B12 Objective: Data to refine assessment methods for marine DO Two additional buoys in the Taunton Estuary: one in the middle Taunton Estuary, downstream of the mouth of the Assonet (and between the Somerset and Taunton WWTF) X Objective: Data to refine assessment methods for marine DO Two additional buoys in the Taunton Estuary: second in the upper Taunton Estuary near the saltwater-freshwater interface (and upstream of the Taunton WWTF) X Objective: Data to refine assessment methods for marine DO Consider additional DO sensor profiles (top/middle/bottom) at additional locations in the Bay: (1) mouth of the Cole and (2) Lee Rivers, and (3) down-bay from the Fall River WWTP X MHB-5 X RI Buoy X Potential DO sites SMAST site B12 X Objective: Data to refine assessment methods for marine DO Consider additional bottom DO sensors added at locations in the Cole and Lee Rivers MHB-5 X X B12 Objective: Data to refine assessment methods for marine DO Collect vertical WQ profiles at fixed locations in Mount Hope Bay between near MassDEP buoys (Cole and Taunton) and NBFSMN buoy (B12), and proposed DO sensors to assess DO conditions and stratification, and compare to continuous records Water-column profiles surface pynocline DO/temperature/salinity/pH/chlorophyll/ turbidity bottom Objective: Data to refine assessment methods for marine DO Profiles would be collected during maintenance, but could also target particular conditions: - Measured during different portion of the tidal cycle during the same time period (low/slack high in August) - During the same portion of the tidal cycle over the course of several months, such as during neap tides in July, August and September - Event based vertical profiles triggered by wet or dry weather, or low wind conditions Oxygen demand coupled with warm waters and density stratification increases the risk of hypoxic conditions in the summer months, especially during periods of with higher freshwater discharges, and during neap tides when tidal mixing is low and (Prell 2015). Objective: Data to refine assessment methods for marine DO Historic data: The “Insomniacs” conducted night-time surveys in Narragansett Bay in the summers of 1999 to 2003 that included 13 Surveys of a transect across Mount Hope Bay (Prell and others, 2004). Data from vertical profiles was used to plot DO conditions in the Bay (Desbonnet and Costa-Pierce, 2008) Source: Chap 11 & 13 in Desbonnet and Costa-Pierce, 2008) 3. Assessment of waterbody compliance to water-quality standards Taunton River and Mt Hope Bay Taunton River Threemile River (MA62-56) Assessment Units, Locations, and Class Lee River (Lewin Brook to Route 6 , Class B Segreganset River (MA62-53, MA62-54) Lee River Segment (Route 6 into Mt. Hope Bay, Class SA) Cole River (Route 6 to mouth, Class SA) Mt. Hope Bay (Braga Bridge to the MA/RI border, Class SB) Mt Hope Bay (west of a line from Brayton Point to Buoy #4, Class SA) Taunton River (Route 24 Bridge to Berkley Bridge, Class SB ) Taunton River (Berkley Bridge to town boundaries, Class SB) Assonet River Taunton River (town boundaries to mouth at Braga Bridge , Class SB) Assonet River (Tisdale Dam to the confluence with the Taunton) Taunton River (Source to Rt. 24 Bridge, Class B) Lee River Cole River Mt Hope Bay Twenty-five percent of Mt. Hope Bay is located within Massachusetts. 3. Assessment of waterbody compliance to water-quality standards Mt. Hope Bay KEY SMAST sites Mt Hope Bay from Common Fence Pt. Brayton Point SA SB Cole River from Ocean Grove 3. Assessment of waterbody compliance to water-quality standards Two additional buoys in Mt Hope Bay, between the Cole and Taunton Buoys, and in the lower Taunton Estuary (between the Somerset and Fall River WWTF’s) New buoy stations should include data collection at bottom and mid depths X X RI Buoy Proposed X New Buoy site SMAST site (2004-06) B12 3. Assessment of waterbody compliance to water-quality standards Lower Taunton Estuary KEY SMAST sites Somerset RR jetty Taunton River Estuary http://imagestorage.nerail.org/photos/2010/02/25/20100225205015432.jpg Veteren’s Memorial Bridge Braga Bridge 3. Assessment of waterbody compliance to water-quality standards Two additional buoys in the Taunton Estuary: one in the middle Taunton Estuary, downstream of the mouth of the Assonet (and between the Somerset and Taunton WWTF) X 3. Assessment of waterbody compliance to water-quality standards Assonet Lower Assonet Assonet Bay Assonet Bay Rt. 24 bridge http://www.bostonkayaker.com/cgi-bin/bkonekpage.cgi?pagekey=assonet 3. Assessment of waterbody compliance to water-quality standards Middle Taunton Estuary Dighton Museum Whale Rock http://www.bostonkayaker.com/cgi-bin/bkonekpage.cgi?pagekey=assonet Conspiracy Island http://www.bostonkayaker.com/cgi-bin/bkonekpage.cgi?pagekey=assonet 3. Assessment of waterbody compliance to water-quality standards Upper Taunton Estuary Taunton River, Weir Village Taunton River, Weir Village Aquaria Desal plant http://farm3.staticflickr.com/2328/2414564129_4731d55be3_z.jpg Taunton River Estuary Berkley Bridge Aquaria Desal plant Berkley Bridge 3. Assessment of waterbody compliance to water-quality standards Two additional buoys in the Taunton Estuary: second in the upper Taunton Estuary near the saltwater-freshwater interface (and upstream of the Taunton WWTF) X 4.