Phillipsdale Landing
Overall, water quality was good at Phillipsdale Landing this week. There were 0.74 inches of precipitation recorded at T.F. Green this week, and Blackstone flows continued to be higher than normal for this time of year. Surface salinity averaged 8.0 ppt and ranged from 3.2 ppt to 20.4 ppt. Bottom salinity averaged 19.8 ppt and ranged from 6.2 ppt to 27.2 ppt. Temperatures continued to decline, averaging 6.4°C at the surface and ranging from 3.6°C to 8.8°C. At the bottom, temperatures averaged 8.5°C and ranged from 5.5°C to 10.1°C.
Dissolved oxygen (DO) at Phillipsdale Landing remained above the hypoxia threshold of 2.9 mg/L at both the surface and bottom all week. Surface DO was similar to last week, averaging 10.9 mg/L and ranging from 8.8 to 12.4 mg/L. Bottom DO averaged 8.7 mg/L and ranged from 7.3 mg/L to 11.0 mg/L. Chlorophyll readings remained mostly low with a few slightly elevated readings at the bottom. Chlorophyll averaged 0.6 ug/L at the surface and 1.9 ug/L at the bottom. Please note that tidal fluctuations and Blackstone River flows greatly influence water column salinity, temperature, and DO at this location.
Bullock Reach
The sondes at Bullock Reach have been retrieved for the 2023 season.