Historical News

Week of September 20 – September 26, 2020

Surface Mapping

Data were collected on September 23, 2020 while the R/V Monitor was underway collecting nutrient samples and performing vertical profiles in the Providence and Seekonk River estuaries. The chlorophyll concentrations were good to fair in the areas surveyed with slightly elevated results in the northernmost sampled areas. From north to south, average chlorophyll concentrations were as follows: Seekonk River (12.19 µg/L), Upper Providence River (4.47 µg/L), Edgewood Shoals area (4.57 µg/L), Pawtuxet River area (6.26 µg/L), and Lower Providence River area (5.49 µg/L). Overall, chlorophyll ranged between 2.20 µg/L and 29.00 µg/L with an overall average of 6.24 µg/L.  The chlorophyll data from this date are presented in the map below:

Dataflow 2020-09-23 small.jpg

Week of September 20 - 26, 2020

R/V Monitor's Blog

​The R/V Monitor was out on the boat twice this week. First, on Wednesday, September 23rd, the crew was out collecting nutrients and plankton samples, taking Secchi Disk and Par sensor water clarity measurements, conducting water column profiles using the Seabird instrument, and conducting real-time surface mapping of water quality parameters, including dissolved oxygen, chlorophyll, water temperature, salinity, and pH, all in an effort to document water quality improvenents associated with NBC construction projects.  In addition, the Bullock's Reach buoy was serviced and sondes changed out.  Jeff captained the boat while monitoring professionals Gerard and Mike collected the samples and data, and serviced the buoy.  It was a cool, crisp, sunny morning warming up nicely by the afteroon. There was a light wind from the west-northwest and calm waters all day. On Thursday, September 24th the crew returned to conduct benthic video transects at established sites in the Bay.  It was a warm, cloudy day with a light wind out of the south and calm waters. Jeff captained the boat while monitoring professionals Gerard and Amanda conducted the video transects. This week's photo was taken on Wednesday and features a US Coast Guard ship out on the upper Bay.

9-23-20 Coast Guard Ship.jpg 

Week of September 13 – 19, 2020

Water Column Clarity

​Water clarity was measured at eight locations in the Providence River and Seekonk Rivers on September 16, 2020. No rainfall was recorded on the day of the survey and in the three days prior. Water clarity increased compared to the previous survey day. Overall, sites surveyed averaged 1.69 meters Secchi depth, compared to 1.36 meters on September 10. The lowest clarity (1.03 m) was measured at the Phillipsdale Landing site, while the greatest clarity (2.43 m) was measured at the Bullock's Reach site. Overall, a slight gradient of increasing clarity from north to south was observed among all sites.

Week of September 6 – 12, 2020

Water Column Clarity

Water clarity was measured at five locations in the Providence River and Seekonk Rivers on September 10, 2020. On the day of the survey there was 0.03 inches of recorded rainfall, with no recorded rainfall in the three days prior. Water clarity increased slightly compared to the previous survey day. Overall, sites surveyed averaged 1.36 meters Secchi depth, compared to 1.35 meters on September 2. The lowest clarity (0.83 m) was measured at the India Point Park site, while the greatest clarity (1.77 m) was measured at the Conimicut Point site. Overall, a gradient of increasing clarity from north to south was observed among the sites.

Week of August 30 – September 5, 2020

Water Column Clarity

​Water clarity was measured at seven locations in the Providence and Seekonk Rivers on September 2, 2020. On the day of the survey there was 0.42 inches of recorded rainfall, with no recorded rainfall in the three days prior. Water clarity decreased slightly compared to the previous survey day. Overall, sites surveyed averaged 1.35 meters Secchi depth, compared to 1.95 meters on August 19. The lowest clarity (0.90 m) was measured at the Phillipsdale Landing site, while the greatest clarity was measured at the Bullock's Reach site (2.03 m). Overall, a gradient of increasing clarity from north to south was observed among the sites.

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