Comparative Study of physic-chemical properties of water of Rabindra Sarobar Lake and Santragachhi Jheel
Mode of Presentation: Talk
Conference Name: CCEED-2012
Year: 2012
Area: Chemical Ecology
Authors: Devsena Roychaudhury, Arjan Basu Roy and Jhimli Bhattacharyya
Abstract
The quality of surface water of any wetland is very important factor from which the overall behavior of a wetland can be understood. The ongoing physical and chemical processes within the water body actually govern the surface water condition. The natural processes, such as rain, soil erosion, change of crustal materials etc and anthropogenic factors like urban industrialization, pollution, agricultural activities, increasing usage of water together determine the quality of surface water in a region. Thus the biodiversity of the adjoining area of a wetland play crucial role for the wetland’s water quality as well as its overall properties. By studying the physico-chemical properties of the surface water of different wetlands we can estimate the factors affecting the wetland’s properties as well as the relation between the wetland and the adjoining areas. In other words, the impact of the wetland on the adjoining areas’ biodiversity can be estimated from the surface water quality. To establish the spatial and temporal variations in water quality, regular monitoring programs are required.
In order to have a comparative and systematic study of different wetlands of Kolkata and adjoining areas, the temporal and spatial distribution of DO, turbidity, pH, TDS, conductance of the surface water collected from three points of Santragachhi lake and Rabindra Sarobar lake were measured during September 2011 to December 2011. The pH of the water was 6.7 – 7.5 during the entire study period at Santragachhi, while in Rabindra Sarobar it remained in the region of 7.2. The conductivity at Santragachhi lake was averaged at the region of 1.95 where as in Rabindra Sarobar it was much lower and was averaged at 0.4. The TDS at Santragachhi was found increasing marginally during the selected period of time, where as in Rabindra Sarobar it has the same trend but the value in ppm is very much lower compared to that of the Santragachhi lake. The turbity of the Santragachhi lake was found to be increasing over the period of study, where as in case of Rabindra Sarobar lake it was quite static with a much lower value. The DO level was found to be ~ 4.8 mg/L in Santragachhi, where as in Rabindra Sarobar it was in the region of ~7.3 mg/L.