Water quality aspects of some ponds in Asansol

摘要

Chemical and biological parameters were analysed in five ponds over a period of one year (October 2003 to September 2004) at Asansol. The results of analysis were used for developing two water quality indices, namely, Canadian Council of Ministers (CCME) and National Sanitation Foundation (NSF). The Trophic State Index, a measure of the biological water quality had mean values of 13.54 in summer; 11.09 in monsoon and 13.45 in winter. The Gross, Net Primary Productivity and Community Respiration showed mean values of 200.93,104.73 and 138.53 mg/cm~3/hour respectively during the study period. The CCME water quality index had mean values of 28.2 in summer, 29.06 in monsoon and 30.844 in winter. The NSF index gave mean values of 53.6 in summer, 52.69 inmonsoon and 52.688 in winters. After comparison of the results with actual water quality it can be said that the CCME water quality index is a more acceptable model for assessment of water quality.