Tees estuary between Gares and Blue House Point (site of new barrage), north east coast of England. Grid reference: 4555 East 5290 North to 4448 East 5185 North

Ammonium and ammonia concentration parameters in water bodies; Dissolved oxygen parameters in the water column; Vertical velocity of the water column (currents); Nitrate concentration parameters in the water column; Salinity of the water column; Horizontal velocity of the water column (currents); Temperature of the water column; Nitrite concentration parameters in the water column

Current meters; discrete water samplers; salinity sensor; nutrient analysers; dissolved gas sensors

Vertical profiles were taken every half-hour over the full tidal period, sampling at 1m depth intervals between surface and bottom. Sampling was undertaken at 5 anchored stations over the periods 2 - 4 and 9 - 11 June 1990, corresponding to 3 days of neap tide and 3 days of spring tide. Additional samples for nutrients were taken half-hourly at surface on 4 June 1990 (nitrate, nitrite and ammonia).

AstraZeneca, Brixham Environmental Laboratory
Freshwater Quarry
Brixham
Devon
TQ5 8BA
United Kingdom