Gregory River - Buoy 3 - Environmental - 2022

This resource collects time series water physicochemical In-situ parameter readings, water (current) flow velocity and direction, Nitrogen and Carbon compounds and weather conditions every ten minutes. Quality control codes have been introduced to the data to assist with interpretation of the data.

Equipment is housed in a large yellow floating Buoy, anchored in position within the tidal zone upstream of the intake pumps for Tassal Auaculture property approximately 6.0km from the mouth of the Gregory River, Proserpine at Lat-20.1688 Long 148.464 Datum GDA.

Water column depth at this position is approximately 5.0 meters.

Water Quality is measured by a YSI EXO2 mulitparameter sonde at 0.4m below the surface, which collects : Timestamp, Record, EXO_TempC, EXO_SpCondmScm, EXO_Salpsu, EXO_pHmV, EXO_pH, EXO_Depthm, EXO_BatV, EXO_ChlugL, EXO_ChlRFU, EXO_DOPerSat, EXO_DOmgL, EXO_BGAPERFU, EXO_BGAPEugL, EXO_TurbFNU, EXO_fDOMRFU, EXO_fDOMQSU and EXO_TurbNTU data. Water flow direction and velocity are also collected at a depth of 1.0 meter below the surface via an Aanderra Doppler Current Sensors (DCS) Model 420 which operates on the backscatter acoustic doppler principle. The sensor has built-in compass and tilt sensor.

Doppler Parameters measured/collected are: Timestamp, Record, DCS_Model, DCS_ Serial, DCS_ABSSpeed_Avg (UNIT cm/S), DCS_Direction_Avg, DCS_NorthCur_Avg, DCS_Heading_AVG, DCS_TiltX_Avg, DCS_TiltY_Avg, DCS_SPstd_Avg, DCS_SigStrenght_Avg, DCS_PingCnt_Avg, DCS_AbsTilt_Avg, DCS_MaxTilt_Avg, DCS_StdTilt_Avg.

A Trios ""Opus"" spectrophotometer with 10 mm optical path, submerged at 1 meter below the surface, measures Nitrogen and Carbon compounds, such as: Nitrate NO3-N, Nitrite NO2-N, CODeq, BODeq, DOCeq, TOCeq, TSSeq, KHP, SAC254, COD-SACeq, BOD-SACeq. Mounted on the vertical spar on the outside of the buoy, the Gill Maximet Compact Weather Station GMX240 measures Ambient Air conditions such as; Gill_Ws_Mean, Gill_Wd_MeanUnitVector, Gill_Wd_StdDev, Gill_WindSpd_Max, Gill_Temperature_Avg, Gill_RH, Gill_Pressure, Gill_Rain_mm_Tot, Gill_TotalRain_mm, Gill_DewPoint_Avg, Gill_SRad_Avg, Gill_SunHours_Avg, Gill_Latitude, Gill_Longitude, Gill_Time, Gill_Status, Gill_Status1, Gill_Status2, Gill_Status3, Gill_Status4, Gill_Status5, Gill_Status6.

See YSI website for instrument accuracy, method of operation etc. For more information visit:

• YSI EXO2 Water Quality
• Aanderra Doppler
• Trios Opus Nitrate Analyser
• Gill MaxiMet GMX240 Weather Station

Quality Codes
[990] Uncertain – Subnormal
[1000] WQ – Good – Verified
[1010] WQ – Good – Checked
[1030] WQ – Good – Historical
[2000] WQ – Uncertain – Unchecked
[3010] WQ – Bad – Pump failure
[3020] WQ – Bad – Probe failure
[3030] WQ – Bad – Flow Cell Failure
[3040] WQ – Bad – Unknown Failure
[3050] WQ – Bad – No Data
[3060] WQ – Bad – Equipment out of water

Legacy Quality Codes
[1] [LEGACY] WQ – Good – Checked
[2] [LEGACY] WQ – Good - Verified
[4] [LEGACY] WQ – Good – Historical
[101] [LEGACY] WQ – Uncertain – Unchecked
[105] [LEGACY] WQ – Uncertain - Historical
[201] [LEGACY] WQ – Bad – Pump failure
[202] [LEGACY] WQ – Bad – Probe failure
[203] [LEGACY] WQ – Bad – Flow Cell Failure
[205] [LEGACY] WQ – Bad – No Data
[206] [LEGACY] WQ – Bad – Probe Outside Limits