Water Column Profiles

​Water column profiles were conducted at eight locations in the Providence and Seekonk River estuaries on October 18, 2023 using a Seabird Electronics profiler. In the five days leading up to the survey, trace amounts of precipitation were recorded at T.F. Green. Most sites were weakly to moderately stratified this week, with  the exception of Phillipsdale Landing, which was strongly stratified.

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 1 meter below the surface at India Point Park.

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on October 11, 2023 using a Seabird Electronics profiler. In the five days leading up to the survey, 0.36 inches of precipitation were recorded at T.F. Green. All sites were strongly stratified this week.

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at the Edgewood Yacht Club site. The highest fluorescence readings for the week were measured around 2 meters below the surface at Conimicut Point.

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on October 4, 2023 using a Seabird Electronics profiler. In the five days leading up to the survey, 1.27 inches of precipitation were recorded at T.F. Green. All sites were strongly or moderately stratified this week, other than Pomham Rocks, which was weakly stratified.

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 2 meters below the surface at the Bullock Reach Buoy.​

​​Water column profiles were conducted at six locations in the Providence and Seekonk River estuaries on September 27, 2023 using a Seabird Electronics profiler. In the five days leading up to the survey, 2.77 inches of precipitation were recorded at T.F. Green. All sites were strongly or moderately stratified this week.

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) in the lower portion of the water column at the India Point Park site, and in the lower and middle portions of the water column at Point Street Bridge. The highest fluorescence readings for the week were measured around 3 meters below the surface at the Bullock Reach Buoy.

​Water column profile data was collected at seven sites on September 20, 2023. However, due to an equipment deployment issue, only the data from the Phillipsdale Landing site was usable. In the five days leading up to the survey, 1.55 inches of precipitation were recorded at T.F. Green. 

At the Phillipsdale Landing, the water column here was strongly stratified. Dissolved oxygen (DO) conditions were not observed below the hypoxia threshold (2.9 mg/L), but approached this threshold near the very bottom of the water column. Fluorescence readings at this site were relatively low, but reached a maximum value approximately 2 meters below the surface.

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on September 14, 2023 using a Seabird Electronics profiler. In the five days leading up to the survey, 1.23 inches of precipitation were recorded at T.F. Green. All sites were strongly stratified this week.

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 Phillipsdale Landing sites, in the lower and middle portions of the water column at Conimicut Point and Point Street Bridge, and in all portions of the water column (upper, middle, and lower) at India Point Park, Pomham Rocks, and Edgewood Yacht Club. The highest fluorescence readings for the week were measured around 1.5 meters below the surface at Edgewood Yacht Club.

​Water column profiles were conducted at seven locations in the Providence and Seekonk River estuaries on September 6, 2023 using a Seabird Electronics profiler. In the five days leading up to the survey, no precipitation was recorded at T.F. Green. Most sites were moderately to weakly stratified this week.

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

​​Water column profile data was collected at a single site on August 31, 2023. Further collection was discontinued due to extreme weather conditions.  In the five days leading up to the survey, 0.14 inches of precipitation were recorded at T.F. Green. 

Data was collected at the Edgewood Yacht Club. The water column here was weakly stratified. Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) only at the very bottom of the water column. Fluorescence readings at this site reached a maximum value approximately 3 meters below the surface.

​Water column profiles were conducted at eight locations in the Providence and Seekonk River estuaries on August 23, 2023 using a Seabird Electronics profiler. In the five days leading up to the survey, 2.16 inches of precipitation were recorded at T.F. Green. Most sites were moderately to strongly stratified this week, with the exception of Edgewood Shoals, which was weakly stratified

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) throughout the water column (upper, middle and lower portions) at the Edgewood Shoals, India Point Park, and Phillipsdale Landing sites, but only in the middle and lower portions of the water column at Edgewood Yacht Club and Pomham Rocks. No hypoxic conditions were observed at Conimicut Point, Pawtuxet Cove or Bullock Reach Buoy. The highest fluorescence readings for the week were measured around 1 meter below the surface at Pawtuxet Cove.​

​Water column profiles were conducted at five locations in the Providence and Seekonk River estuaries on August 16, 2023 using a Seabird Electronics profiler. In the five days leading up to the survey, 0.59 inches of precipitation were recorded at T.F. Green. Most sites were moderately to strongly stratified this week.

Dissolved oxygen (DO) conditions were below the hypoxia threshold (2.9 mg/L) throughout the water column (upper, middle and lower portions) at the Point Street Bridge, India Point Park, and Phillipsdale Landing sites, but only in the middle and lower portions of the water column at Bullock Reach Buoy and Conimicut Point. The highest fluorescence readings for the week were measured around 1.5 meters below the surface at Conimicut Point.