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Water Quality Assessment of River Dikhow, Assam, India Using Biological Water Quality Criteria

Author Affiliations

  • 1Department of Zoology, S.P.P. College, Namti, Sivsagar, Assam, India
  • 2Department of Zoology, S.P.P. College, Namti, Sivsagar, Assam, India
  • 3Department of Zoology, S.P.P. College, Namti, Sivsagar, Assam, India

Int. Res. J. Environment Sci., Volume 5, Issue (5), Pages 12-17, May,22 (2016)


An assessment has been made on the water quality of the tail race of River Dikhow - a southern tributary of the mighty river Brahmaputra, Assam, India, following Biological Water Quality Criteria. During the study, the study period (Jan’2013 to Dec’2013) was divided into four seasons-pre-monsoon, monsoon, post-monsoon and winte . March to May is considered as pre-monsoon, Jun to August is considered as monsoon, September to October is considered as post-monsoon and December to February is considered as winter seasons. Studied area was demarcated into five stations, viz station I, station II, station III, station IV and station V. Samples of macro invertebrates were collected monthly and identified following standard methods. A total of thirteen (13) species of three (3) phyla (Annelida, Mollusca, Arthropoda) were recorded during the study. Biological Water Quality Criteria which is based on saprobic and diversity score, showed slight pollution in station V and moderate pollution in station I,II,III and IV. But the extent of pollution in station III was found to be greater as compared to the other stations.


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