Vipul Dev Beniwal, Rinku Kumari & Sushma Jain*
Department of Zoology, Vidya Bhawan Rural Institute, Udaipur, Rajasthan, India
Received : 5th June, 2022 ; Revised : 6th July, 2022
Abstract– During the study period, we observed pH, total hardness, total dissolved solids, alkalinity, chloride, chemical oxygen demand (COD), biological oxygen demand (BOD), magnesium, calcium and electrical conductivity declined after the lockdown period. In addition, the dissolve oxygen concentration of Kot dam increased after the lockdown period compared to before lockdown period. The temperature of Kot dam was also increased, but it is happening due to seasonal changes in environmental temperature. Because during the sampling before the lockdown period (April month), the environmental temperature is lower as compared to the post-lockdown period (June month). Floride concentrations remained unchanged before and after the lockdown period. The pH of Kot dam water also dropped after the lockdown period (6.98) compared to before the lockdown period (7.16). The average TDS of Kot dam also declined after the lockdown (363.88mg/l) as compared to before the lockdown period (386.66mg/l). Dissolved oxygen value was found 4.4 mg/l after the lockdown and 3.6 mg/l before lockdown. The average total hardness was highest during the before lockdown (173.33mg/l) as compared to after lockdown period (153.33mg/l). The average alkalinity was highest before lockdown (122mg/l) and lowest after lockdown period (121.33mg/l). The concentration of chloride, magnesium and calcium ions was highest found in before lockdown as compare to after lockdown period. The electrical conductivity of water also declined after the lockdown period as compared to before the lockdown period. Chemical and biological oxygen demand (COD and BOD) were also declined after the lockdown period as compared to before lockdown period. The study clearly indicates the water quality of Kot dam increased due to lockdown. As a result of the lockdown, industrial and vehicular movements and activity cease, this leads to a reduction in the rate of pollutants entering the aquatic ecosystem.
Key words: Lock down, Kot Dam, physicochemical parameter, water, pollution, ecosystem
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