MADHAVI, K (MAJOR)PRABHANJAN KUMAR REDDY, CDHANAPAL, KVENKATESH, D2021-07-162021-07-162017-03https://krishikosh.egranth.ac.in/handle/1/5810170591THESESThe present investigation was carried out in Kanigiri and Nellore reservoirs of SPSR Nellore district, Andhra Pradesh, for a period of 8 months from December, 2015 to July, 2016. Surface water samples were collected from the chosen sampling stations at fortnightly intervals and analyzed as per APHA standard methods to provide base line information on the physico-chemical characteristics of these reservoirs. The results obtained (for which guidelines have already been issued by the standard recommending bodies i.e., WHO, BIS) were found to be within the prescribed limits, except BOD as per WHO (2004) and total hardness, when compared with the standards (WHO, 1984; WHO, 2004; BIS, 1991; BIS 2012). Total hardness values were much higher than the permissible limit as prescribed by WHO (1984) but well within the permissible limits as prescribed by BIS (1991) standards. The observed values were tested from fisheries point of view also with the standards proposed by renowned scientists of the field and found to be well within the desired limits. Though the values obtained were within the prescribed standard values, it was found that turbidity, TSS, TDS, TS, pH, BOD, NH3, total alkalinity and total hardness values were found to be slightly higher in the water samples analyzed from Nellore reservoir, while transparency, DO, CO2 levels seemed to be little higher in water samples collected from Kanigiri reservoir. Mean chloride content and salinity values showed negligible difference between the waters of both the reservoirs. With respect to the parameters analyzed in the present study, water quality of Kanigiri reservoir is comparatively better than the Nellore reservoir. Correlation among various parameters showed significant positive and negative trends. Water from both the reservoirs can be considered as ‘alkaliphilous’ based on pH values observed, ‘nutrient rich’ based on the total alkalinity values estimated, ‘hard’ with respect to observed total hardness values. Though both the reservoirs exhibited moderate domestic pollution based on the analyzed chloride content of water, these concentrations are found to be within in the limits as per standards recommended for drinking water supply. Hence, it can be said that, water from both the reservoirs is fit for irrigation, agriculture, pisciculture, industrial and domestic purposes. 1EnglishThesis