Seasonal changes in physico-chemical parameters of Thondi Coast waters, Palk Bay,South East coast, India

Resumo

The present study was carried out to determine the water quality in terms of physicochemical parameters in the coastal waters of Thondi , Palk Bay for a period of one year from Jan2015 to Dec 2015. The analysis of different parameters such as temperature,pH, salinity, TDS, nitrite, nitrate, silicate, inorganic phosphate and total phosphate were carried out using standard methods. Water temperature ranged from 26.0°C-30.0°C, Salinity ranged (30.1-34.55‰, pH(8.0 -8.2), EC value (45.20103mho-50.49 103mho),Turbidity 28-59 NTU, TSS value (58.28-95 mg/l), DO (4.01 ml/l -5.61 ml/l), BOD (0.16 mg/-2.19 mg/l), Chemical Oxygen Demand (0.87 ml/l -19.9mg/l ), Chloride 17252 mg/l -17850 mg/l ), Sulphate (1098.79 mg/l -2637.41 mg/l),Nitrite (0.117 μm/l and 1.192 μm/l), nitrate (1.513 μm/l and 12.981 μm/l), Ammonia (0.017 μm/l and 0.11 μm/l), total nitrogen (16.531 μm/l and 35.616 μm/l), inorganic phosphate (0.523 μm/l and maximum 2.047 μm/l), Total phosphorus (0.81 μm/l and 4.386 μm/l)and silicate was recorded 41.676 μm/l and 61.149 μm/l.In sediment samples pH(7.7-8.1), Total Phosphorus(1.40μg/g -2.58μg/g),total nitrogen (4.14 μg/g -9.80 μg/g), total organic carbon (1.70 mg/g-5.84 mg/g).The studies revealedthat the physico-chemical parameters of waterand samples showed seasonal variations in Thondi coastal waters.