“LIMNOLOGICAL STUDIES OF A SEWAGE FED TANK OF RAIPUR, TELIBANDHA”
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Date
2006
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Indira Gandhi Krishi Vishwavidyalaya, Raipur
Abstract
Samples of water were collected at monthly intervals from two different sites of sewage fed Telibandha pond in Raipur, Chhattisgarh. Analysis of different physico-chemical and biological parameters were done at monthly interval for one year. The values so obtained for different parameters were subjected to analysis of variance and correlation to establish the interrelationship of some important hydro biological parameters. All the parameters like pH, water temperature, dissolved oxygen, free carbon dioxide, hardness, total alkalinity, orthophosphate, ammonical-N, phytoplankton, zooplankton, gross primary productivity and net primary productivity varied significantly throughout the year except BOD. Surface runoff and sewage waste chiefly contributed to the productivity of the pond and hence phytoplankton population was fairly high compared to that of zooplankton. Chlorophyceae among phytoplankton and Copepods among zooplankton were dominant. The annual average gross production during the study period was 2098.18 mg C/m3 /d or 214.8 tons/year for the entire pond. Average NPP was observed to be 1071.44 mgC/m3/day totaling to 109.65 tons/year for the whole pond. High alkalinity (207.72 mg/L), medium hardness (94-193 mg/L), alkaline pH (7.59.0), good dissolved oxygen (5.6-13.18 mg/L) with high ammonical nitrogen (0.074-0.92 mg/L) and orthophosphate (0.19 to 0.94 mg/L) indicates eutrophic natures of pond.
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