September 25, 2024

​Surface chlorophyll data were collected on September 25, 2024 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as good in the Northern Providence River Channel and Edgewood, and as fair in all other areas. Overall, chlorophyll ranged 0.99 to 15.81 µg/L with an average of 5.14 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

September 11, 2024

​Surface chlorophyll data were collected on September 11, 2024 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as fair in all areas. Overall, chlorophyll ranged 2.45 to 33.57 µg/L with an average of 11.07 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

August 21, 2024

​Surface chlorophyll data were collected on August 21, 2024 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as good in the Seekonk River and Northern Providence River Channel, and as fair in all other areas. Overall, chlorophyll ranged 0.93 to 20.56 µg/L with an average of 4.42 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

August 14, 2024

​Surface chlorophyll data were collected on August 14, 2024 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as poor in the Seekonk River, and as fair in all other areas. Overall, chlorophyll ranged 1.31 to 109.86 µg/L with an average of 19.45 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

August 7, 2024

​Surface chlorophyll data were collected on August 7, 2024 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as fair in all areas surveyed. Overall, chlorophyll ranged 1.72 to 24.79 µg/L with an average of 7.32 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

August 7, 2024

Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on August 7, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, 0.95 inches of precipitation were recorded at T.F. Green. Water column stratification at the sites varied from weakly stratified at Pawtuxet Cove and Edgewood Yacht Club, to strongly stratified at Conimicut Point. 

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at Edgewood Yacht Club, in the middle and lower portions of the water column at Pomham Rocks, and in all portions of the water column (upper, middle and lower) at India Point Park and Phillipsdale Landing. The highest fluorescence readings for the week were measured around 2 meters below the surface at Edgewood Yacht Club.

August 7, 2024

Nutrient samples were collected from seven river stations and seven bay stations on August 7th. All bay stations were sampled at the surface and bottom. In the five days prior to sampling and the morning of, there were 1.02 inches of precipitation recorded at T.F. Green. 

Among the river stations sampled, the highest total nitrogen (TN) and dissolved inorganic nitrogen (DIN) concentrations were observed at Blackstone River @ Bike Path Bridge (TN = 1,390 ppb, DIN = 1,160 ppb); the highest total dissolved nitrogen (TDN) was observed in one of the duplicate samples at Pawtuxet River @ Broad St (1,470 ppb). The lowest TN, TDN, and DIN were observed at Woonasquatucket River @ Manton Ave Bridge (TN = 514, TDN = 480 ppb, DIN = 232 ppb).

Among the bay stations sampled, the highest surface total nitrogen (TN), total dissolved nitrogen (TDN), and dissolved inorganic nitrogen (DIN) were observed at Pawtuxet Cove (TN = 1,190 ppb, TDN = 1,040 ppb, DIN = 790 ppb). The lowest surface TN, TDN, and DIN concentrations were observed at Conimicut Point (TN = 653 ppb, TDN = 403 ppb, DIN = 154 ppb).

The next scheduled sampling date is August 21, 2024.​

August 1, 2024

​Surface chlorophyll data were collected on August 1, 2024 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as fair in all areas surveyed. Overall, chlorophyll ranged -0.45 to 63.34 µg/L with an average of 11.02 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

July 24, 2024

​Surface chlorophyll data were collected on July 24, 2024 while the R/V Monitor was underway collecting nutrient samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as fair in all areas surveyed. Overall, chlorophyll ranged 2.16 to 38.37 µg/L with an average of 11.21 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

July 17, 2024

​Surface chlorophyll data were collected on July 17, 2024 while the R/V Monitor was underway collecting bacteria samples in the Providence and Seekonk River estuaries. The average chlorophyll concentrations were categorized as poor in the Seekonk River and as fair in all other areas. Overall, chlorophyll ranged 2.29 to 57.17 µg/L with an average of 18.45 µg/L. The chlorophyll concentrations from this date are presented in the map below using Inverse Distance Weighting (IDW) interpolation.

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