Water Column Profiles

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on September 11, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, 0.02 inches of precipitation were recorded at T.F. Green. Water column stratification at the sites varied from well-mixed at Edgewood Yacht Club and Point Street Bridge, to moderately stratified at Phillipsdale Landing. 

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, and in the middle and lower portions of the water column at Phillipsdale Landing. The highest fluorescence readings for the week were measured around 1 meter below the surface at Phillipsdale Landing.​

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on September 4, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, no precipitation was recorded at T.F. Green. Water column stratification at the sites varied from well-mixed at Pomham Rocks, to weakly stratified at all other profiled sites.

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at Phillipsdale Landing, Edgewood Yacht Club, and India Point Park. The highest fluorescence readings for the week were measured around 1 meter below the surface at Pomham Rocks. ​

​​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on August 28, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, 1.38 inches of precipitation were recorded at T.F. Green. Water column stratification at the sites varied from well-mixed at Point Street Bridge, to moderately stratified at Phillipsdale Landing, Pomham Rocks, and India Point Park 

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at Pomham Rocks and India Point Park, and in all portions of the water column (upper, middle and lower) at Phillipsdale Landing. The highest fluorescence readings for the week were measured around 1 meter below the surface at India Point Park.

​Water column profiles were conducted at eight locations in the Providence and Seekonk River estuaries on August 21, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, 0.48 inches of precipitation were recorded at T.F. Green. Water column stratification at the sites varied from weakly stratified at seven of eight sites, to moderately stratified at Phillipsdale Landing. 

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 Edgewood Shoals, and in all portions of the water column (upper, middle and lower) at India Point Park. Conditions at Phillipsdale Landing did not dip below the hypoxia threshold but did approach it in the lower portion of the water column. The highest fluorescence readings for the week were measured around 1.5 meters below the surface at Bullock Reach Buoy.

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on August 14, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, 1.32 inches of precipitation were recorded at T.F. Green. Water column stratification at the sites varied from weakly stratified at Point Street Bridge, India Point Park, Pomham Rocks and Edgewood Yacht Club, to strongly stratified at Phillipsdale Landing. 

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at Pomham Rocks, in the middle and lower portions of the water column at Edgewood Yacht Club, and in all portions of the water column (upper, middle and lower) at Point Street Bridge, India Point Park and Phillipsdale Landing. The highest fluorescence readings for the week were measured around 1 meter below the surface at Phillipsdale Landing.

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.

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on August 1, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, 1.34 inches of precipitation were recorded at T.F. Green. Water column stratification at the sites varied from well-mixed at Edgewood Yacht Club, to strongly stratified at Point Street Bridge. 

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at Point Street Bridge and Pomham Rocks, and in the upper and middle portions of the water column at Phillipsdale Landing. The highest fluorescence readings for the week were measured around 1.5 meters below the surface at Phillipsdale Landing.​

​Water column profiles were conducted at eight locations in the Providence and Seekonk River estuaries on July 24, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, 0.06 inches of precipitation were recorded at T.F. Green. Water column stratification at the sites varied from well-mixed at Pawtuxet Cove and Phillipsdale Landing, to moderately stratified at sites such as Bullock Reach Buoy and India Point Park. 

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at the Bullock Reach Buoy, and in the lower and middle portions of the water column at the Pomham Rocks, India Point Park, Edgewood Yacht Club, and Edgewood Shoals sites. The highest fluorescence readings for the week were measured around 1.5 meters below the surface at Pawtuxet Cove.

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on July 17, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, 0.48 inches of precipitation were recorded at T.F. Green. Water column stratification at the sites varied from weakly stratified at Point Street Bridge, to strongly stratified at a majority of sites, including Bullock Reach Buoy and Phillipsdale Landing. 

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at the Bullock Reach Buoy and Edgewood Yacht Club sites, in the lower and middle portions of the water column at the Pomham Rocks and Phillipsdale Landing sites, and in all portions of the water column (upper, middle, and lower) at India Point Park. DO conditions were below the hypoxia threshold at Conimicut Point only in the middle portion of the water column. The highest fluorescence readings for the week were measured around 1 meter below the surface at Phillipsdale Landing.

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on April 16, 2024 using a Seabird Electronics profiler. In the five days leading up to the survey, 1.01 inches of precipitation were recorded at T.F. Green. Most sites were strongly stratified this week, with the exception of Phillipsdale Landing, which was dominated by freshwater.

Dissolved oxygen (DO) conditions were not observed to be below the hypoxia threshold (2.9 mg/L) at any site profiled this week. The highest fluorescence readings for the week were measured around 10 meters below the surface at Pomham Rocks.