Assessment of Primary Productivity and Plankton Population in Anasagar Lake Ajmer and Barali Lake Hurda
During the study, the highest value of total alkalinity was in summer 2015-16 and 2016-17 (590mg/l) and lowest value was observed in winter 2005-06 (410mg/l). Total alkalinity shows a positive relationship with temperature, pH, total hardness, TDS, conductivity, chloride and nitrate. The average value of total hardness during the study was lowest value of 315 mg/l in 2015-16 and 2016-17 and highest value of 375mg/l in 2006-07. A sound legal policy is required to protect this unique saline ecosystem. To deal with the problems of Sambhar Lake and its restoration, the existing acts, legislations, and laws must be suitably integrated within a single specific legislation, including possible new legislation. There is a need for assessing water availability and land use in lake catchments. The average value of total hardness during the study was lowest value of 315 mg/l in 2015-16 and 2016-17 and highest value of 375mg/l in 2006-07. This increase in total hardness during summer period is due to higher photosynthetic activity, free carbon dioxide is utilized and bicarbonates are converted into carbonates and precipitated as calcium salts. Total Dissolved Solid (TDS) ranged between 950 mg/l to 1400 mg/l with lowest during winter 2015-16 and 2016-17 and highest during summer 2015-16 and 2016-17 respectively. Higher concentration of TDS also due to the discharge savage and organic matter by the interference of human. Chloride concentration varied between 140 mg/l to 190 mg/l in 2015-16 and 2016-17. Higher chloride concentration during the summer because high temperature and consequent evaporation. In rainy season, lower concentration of this factor due to dilution. According to the study, rich contents of nitrates were observed, with maximum of 4.5mg/l during summer 2015-16 and 2016-17 and minimum of 2.1 mg/l during monsoon 2005-06. This can be attributed to high evaporation which increases the concentration during summers. Nitrate showed positive relation with temperature, pH, alkalinity, total hardness, TDS, chloride and fluoride and productivity, and negative relation with dissolved oxygen.
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