The present study was undertaken to collect baseline data on the Physico-chemical parameters from the Baigul reservoir of distt - Udham Singh Nagar, Uttarakhand located in the Tarai region of Uttarakhand. The ecology of reservoir plays a vital role in biological productivity. The nutrient status of water and soil plays the most significant role in governing the production of planktonic organisms. Various physical factors of water, such as temperature and light, play important role in metabolic activities in the water bodies while chemical characteristics such as pH, dissolved gases, carbonates and bicarbonates, nitrogen, phosphorus, silicon, calcium, magnesium, iron, chloride etc. largely govern their productivity. Thus, above said parameters were recorded from June 2014 to May 2015. Both lotic and lentic sites were selected for the study. Differential analysis was also drawn on the basis of diurnal variation, monthly variation. Analysis was also drawn on the basis of sampling sites.

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