Assessment of Seasonal Variation in Water Quality and Water Quality Index of Tattekere Lake, Bangalore, India

Abstract

Wetlands are transition zones on the planet that play an important role in nutrient dynamics and primary productivity. Bangalore and its urban agglomerations have many artificial wetlands developed for various hydrological purposes to meet the needs and water requirements of the city. The wetlands of Bangalore are subject to anthropogenic pressures, primarily due to the continuous discharge of wastewater, which has altered the chemical integrity of the wetlands. The current study was conducted to evaluate seasonal variations in physicochemical parameters of water quality and to calculate the water quality index of Tattekere Lake in Bangalore. Tattekere Lake, one of the largest lakes in Bangalore, Karnataka, India, originates in the central Gottigere area and traverses several major agricultural areas as well as various companies that receive enormous wastewater from various sources. Water samples were collected from four locations and analyzed for pH, electrical conductivity, TDS, dissolved oxygen, nitrate, BOD, total hardness, Ca, Mg, chlorides and alkalinity using standard methods. Seasonal variations in water quality measurements were recorded and compared to norms, and water pollution status was also examined.