Pollution de l’environnement et changement climatique

Abstrait

Comparative Study on Seasonal Variations in Hydrobiological Parameters of Gagan River

Mehnaz Bi

With the help of hydrobiolological kit and standard chemical methods, various hydrobiological parameters such as pH, BOD, COD, DO and TDS were analysed at Moradabad and nearby areas. The experiments were carried out during 3 seasons (rainy, winter and summer) in year between 2017-2018. The COD values were found ranging from 45 mg/l to 69.5 mg/l, BOD ranged from 18.02 mg/l to 46 mg/l, DO was 1.6 mg/l to 7.65 mg/l and TDS ranging in between 35.5 mg/l to 295 mg/l. The effect of these parameters is not only devastating to people, but also to animals, fish and birds. Polluted water is unsuitable for drinking recreation and agriculture purposes.