Multivariate Statistical Interpretation of Physico-Chemical and Radiological Parameters of Tapi River Water Due to the Operation of Kakrapar Atomic Power Station

P. K. Sarkar; A. G. Hegde; P. M. Ravi; M. Gadhia; M. K. Jha; A. K. Patra
Eleven physico-chemical and three radiological parameters were studied in eight different sampling locations from upstream and downstream of Tapi river water due to the operation of the Pressurised Heavy Water Reactor (PHWR) located at Kakrapar. Different multivariate statistical techniques such as Cluster Analysis (CA), Factor Analysis (FA)/ Principal Component Analysis (PCA) were applied for evaluation of temporal/spatial variations of water quality data obtained during 2007-2009. The PCA of the four data sets evolved three PCs each for all the regions with eigen value > 1, explaining 57.4, 62.5, 55.7 and 70.0% of the total variance in respective water quality data sets. CA of grouping all the eight sampling locations on the aquatic system into three statistically significant clusters at (Dlink/Dmax) x 100 < 70. CA technique was found to be useful in offering a reliable classification of the surface water. No significant seasonal variations were observed except temperature. The results of physico-chemical parameters were well within the Central Pollution Control Board (CPCB), India prescribed limits. The radioactivity levels of 137Cs, 90Sr and 3 H activity were also well within the prescribed technical specification limit by Atomic Energy Regulatory Board (AERB), India. The present study demonstrated the insignificant impact on aquatic environment due to operation of Kakrapar Atomic Power Station
KAPS; Physico-Chemical Parameters; Radiological Parameters; Tapi River
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