Water quality index and abundance of total zooplankton in Varuna, Madappa and Giribettethe lakes of Mysore, Karnataka State, India

摘要

Water Quality Index (WQI) is a dimensionless number that combines multiple water quality factors into a single number to define the quality of water (e.g., good, moderate or bad).? Conventionally, it has been used for evaluating the quality of rivers, streams and lake waters.? The WQI of Varuna, Madappa and Giribettethe lakes was studied with the help of 21 Physico- chemical parameters obtained for two years (June 2009-May 2011).? The study revealed that Varuna lake is moderately polluted with a WQI of 69, while Madappa lake and Giribettethe lake were severely polluted with a WQI of 83 and 93, respectively.? The first year study revealed that all the three lakes were severely polluted during summer season and were least polluted during winter season.? During second year of study? Madappa and Giribettethe lakes showed high value of WQI during summer season and least value during winter season.? However, Varuna lake showed a high WQI during rainy season. Zooplanktons can also be used as bioindicators for water pollution.? The study on the abundance of total zooplankton in all the three lakes revealed that the abundance was maximum during summer season and least during rainy season. ?These findings have been discussed in the light of recent literature published.