University of the South Pacific water quality in the Ba Catchment coastal zone - 2019

Data set information

| Query EDMED |     

Data holding centreBritish Oceanographic Data Centre
CountryUnited Kingdom  United Kingdom
Time periodSeptember 2015 to December 2019

Vertical spatial coordinates; Alkalinity, acidity and pH of the water column; Turbulence in the water column; Salinity of the water column; Ammonium and ammonia concentration parameters in water bodies; Dissolved oxygen parameters in the water column; Electrical conductivity of the water column; Air temperature; Air pressure


Within Pacific Small Island Developing States (Pacific SIDS), the ridge-to-reef (R2R) approach has emerged as a framework for monitoring river connectivity between terrestrial and marine ecosystems. The study measured water quality, including pH and a range of othe physical and chemical properties over 88.40 km of the Ba River in Fiji. The sampling design focused on measuring spatio-temporal variability in pH throughout the sugarcane season (April - August) with three rapid sampling periods (RSP1, 2 & 3) along the Ba River, together with continuous measurement of temperature and pH using stationary data loggers at two locations upstream and downstream of the sugar mill (April to August 2019). Spatial variability in pH and water quality was characterized before (RSP1 and RSP2) and during (RSP3) the sugarcane season. Mean pH measured before the sugarcane crushing season for RSP1 and RSP2 were 8.16 (± 0.49) and 8.20 (± 0.61) respectively. During the sugarcane crushing season (RSP3) mean pH declined by 3.06 units to 6.94 within 42 m downstream of the sugar mill (P < 0.001). The 3.06 unit decline in pH for RSP3 exceeded both the mean diurnal variation in pH of 0.39 and mean seasonal variation in pH of 2.01. This decline in pH could be a potential source of acidification to downstream coastal ecosystems with implications for coral reefs, biodiversity and fishery livelihoods.

OriginatorsThe University of the South Pacific, Pacific Centre for Environment and Sustainable Development
Data web site
OrganisationBritish Oceanographic Data Centre
ContactPolly Hadžiabdić (Head of the BODC Requests Team)

British Oceanographic Data Centre
Joseph Proudman Building 6 Brownlow Street
L3 5DA
United Kingdom
Collating centreBritish Oceanographic Data Centre
Local identifier1048_USP_WaterQuality
Global identifier7142
Last revised2021-10-05