CSIR Water Research Institute – Results Of Water Quality Analysis of Volta Lake For The Year 2000 And 2003

Below are the results of water quality analysis of the Volta Lake from CSIR Water Research Institute for the year 2000 and 2003.

    Up-Stream of Cages In-Between Cages Down-Stream of Cages
Parameter Units Surface Middle Bottom Surface Middle Bottom Surface Middle Bottom
Temperature oC 29.3 28.7 28.4 29 28.5 28.3 29 28.7 28.5
pH pH Units 7.4 7.8 7.3 7.6 7.4 7.4 7.9 7.6 8.2
Conductivity uS/cm 58.9 59.8 60.3 59.8 63.7 46.5 60.5 60.1 65.4
Total Dissolved Solids mg/l 29.3 29.8 30.1 29.8 31.8 23.3 30.2 30 32.6
Turbidity NTU 2 2 3 2 3 1 3 3 3
Ammonium mg/l <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01
Phosphate mg/l <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01 <0.01
Nitrite mg/l <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001
Total Alkalinity mg/l 31 31 31.5 31 32 31 39 32 31
Total Hardness mg/l 24 24 30 28 27 27 34 26 25
Dissolved Oxygen mg/l 8.2 7.9 7.3 8.1 7.5 7.7 8.2 7.7 7.5
BOD mg/l 1.8 1.5 1.35 1.9 1.4 1.5 1.9 1.65 1.5

Remarks: Transparencies were 1.53 meters at all three sections of the river.

  • All four cages are 5 meters below the river surface as such, the middle refers to that depth
  • The bottom refers to about 8 meters below the surface.

Water quality monitoring for 2000 (before project inception)

Water Research Institute

ARDEC (CSIR)

PO BOX 139 AKOSOMBO

RESULTS OF WATER QUALITY ANALYSES

SOURCE RIVER VOLTA, ANUM BOSO REMARKS: CLOUDY SKIES, DATE 17/6/2000

    Sample Value
Parameter Units Dodi Asantekrom, GWCL Intake Point (Surface) Jerusalem   (Surface)
Temperature 0C 29.2 29.8
pH pH Units 7.2 7.2
Transparency M 1.67 1.79
Turbidity NTU 5 4
Conductivity µS/cm 57.7 58.7
Total Dissolved Solids mg/l 28.8 29.3
Ammonia (NH3-N) mg/l 0.03 0.10
Phosphate (PO4-P) mg/l 0.01 0.10
Nitrite (NO2-N) mg/l 0.008 0.012
Nitrate (NO3-N) mg/l 0.01 0.02
Total Alkalinity (as CaCO3) mg/l 30.0 30.0
Total Hardness (as CaCO3) mg/l 27.5 34.0
Dissolved Oxygen (DO) mg/l 7.2 7.3
Biochemical Oxygen Demand (BOD) mg/l 1.0 1.5
       
    Sample Value
Parameter Units Dodi Asantekrom, GWCL Intake Point (Bottom) Jerusalem 20m offshore (Bottom)
Temperature 0C
Transparency M    
Turbidity NTU 12 11
Conductivity µS/cm 78.7 74.1
Total Dissolved Solids mg/l 39.4 37.0
Ammonia (NH3-N) mg/l 0.06 0.08
Phosphate (PO4-P) mg/l 0.01 0.01
Nitrite (NO2-N) mg/l 0.007 0.07
Nitrate (NO3-N) mg/l 0.02 0.01
Total Alkalinity (as CaCO3) mg/l 31.5 31.5
Total Hardness (as CaCO3) mg/l 30.0 36.0
Dissolved Oxygen (DO) mg/l 7.3 7.5
Biochemical Oxygen Demand (BOD) mg/l
       

Source: Crystal Lake Fish Limited

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