Historical News

Week of September 8 - 14, 2019

R/V Monitor's Blog

​The crew of the R/V Monitor was out on the upper Bay twice this week.  First on Tuesday, September 10th, staff were out installing a temporary buoy in the Bullock's Reach area.  The data obtained at this location during its approximate two month deployment will aid in the refinement of the ROMS hydrodynamic model of upper Narragansett Bay.  Jeff captained the boat, while NBC monitoring professionals Sara, Bekki and Amanda installed the monitoring equipment.  It was a warm and mostly sunny day with no wind and very calm waters.  Again, on Wednesday,  September 11th, 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 improvements associated with NBC construction projects.  Sara captained the boat this day while monitoring professionals Fern and Amanda collected the samples and data.  The day began cloudy but there was some sun by the afternoon.  There was a moderate wind out of the southwest, making the water a bit choppy.  The photo below was taken on the 10th during the temporary buoy installation.

 9-10-19 Temporary Buoy.JPG

Week of September 1 - 7, 2019

R/V Monitor's Blog

​On Thursday, September 5th, the crew of the R/V Monitor was out on the upper Bay collecting bacteria 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 improvements associated with NBC construction projects.  Jeff captained the boat while monitoring professionals Sara and Amanda collected the samples and data.  It was a cool sunny day with a light breeze from the northeast.  The water was a bit choppy.  Today's photo features a dragon boat seen at the head of the Seekonk River.

9-5-19 Dragon Boat.jpg 

Week of August 25 - 31, 2019

Water Column Clarity

​Water clarity was measured at six locations in the Providence and Seekonk Rivers on August 28, 2019. The weather three days prior to the survey was mostly dry, and clarity increased at most sites. Average Secchi depth measured 2.2 m compared to 1.5 m during the previous survey. Five sites exhibited increased Secchi depth, with the greatest increase observed at Pawtuxet Cove (+1.1 m). Secchi depth at the remaining sixth site (Edgewood Yacht Club) was unchanged from the previous survey and was the lowest this week (1.63 m). The highest Secchi depth (2.6 m) was observed at Conimicut Point. Overall, there was no gradient in water clarity up or down bay.​

Week of August 18 - 24, 2019

Water Column Clarity

​Water clarity was measured at six locations in the Providence and Seekonk Rivers on August 21, 2019; moderate rain of 0.4 inches fell two days prior to the survey. Despite the recent rain, average Secchi depth increased slightly since the previous week’s survey, from 1.4 m to 1.5 m. Four sites exhibited increased clarity since the previous survey, with the greatest increase observed at India Point Park (+0.9 m). Two sites exhibited decreased clarity, with the greatest decrease observed at Pomham Rocks (-0.6 m). Overall, there was no gradient in water clarity up or down bay. The lowest clarity (0.4 m) was measured at Phillipsdale Landing; the highest water clarity (1.9 m) was observed at Point St. Bridge and Conimicut Point.​

Week of August 25 - 31, 2019

Water Column Profiles

Water column profiles were measured at six sites in the Seekonk and Providence Rivers on August 28, 2019. In the five days prior to sampling, 0.1 inches of precipitation was recorded. Water column profiles were relatively well-mixed.

Salinity in surface waters ranged from 27 psu at Pawtuxet cove to 29 psu at Conimicut Point. Salinity in bottom waters ranged from 29 psu at India Point Park to 30 psu at Bullock Reach. Temperatures in surface waters ranged from 21.1°C at Conimicut Point to 21.8°C at Pawtuxet Cove. Bottom waters ranged from 20.2°C at Bullock Reach to 21.2°C at Edgewood Yacht Club.

This week, hypoxic conditions (e.g., dissolved oxygen [DO] concentrations <2.9 mg/L) were observed below 4 m at Edgewood Yacht Club, with minimum recorded DO values of 1.15 mg/L. Surface DO ranged from 5 to 7 mg/L at most sites. Fluorescence was lower than the previous week, averaging 6.4 mg/m3. Average water column fluorescence was highest at Pomham Rocks, at 8.9 mg/m3.

Older Posts