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(ICV-Poland) Impact Value: 76.37, Impact Factor: RJIF 5.69
E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2018, Vol. 6, Issue 6, Part E

Impacts of human activities on the limnology and water quality index of Ajiwa Dam, Katsina state


Author(s): Zahraddeen Hassan Yusuf and Murja Nakano Rafindadi

Abstract: Present study was conducted to determine the impacts of human activities on the limnology and water Quality Index of Ajiwa Dam, Katsina State. Three sampling sites (A, B and C) were chosen for the study. Results obtained revealed that the mean depth ranged from (3.9 ± 5.23 ft – 2.57 ± 4.27 ft), Transparency (0.67± 0.25 ft-0.1±0.1 ft), Temperature (37.2± 5.88 0C -23.4± 2.31 0C), Electrical Conductivity (91.6 ±3.79 µS/cm-66.33±2.31 µS/cm), Total dissolved solids (44.33 ±2.09 mg/l -32 ±1.73 mg/l), Dissolved oxygen (4.27 ±0.78 mg/l -2.23 ±0.68 mg/l), Biochemical oxygen demand (1.23 ±0.75 mg/l -0.68 ±0.03 mg/l) Nitrate (57.67 ±5.51 mg/l-37.3 ±8.67mg/l), Phosphate (1.8 ±0.04mg/l -0.5±0.06mg/l), Hardness (42.67mg/l±7.77-39.67mg/l±15.4), and pH (7.8±0.63-7.07±0.29). Depth, Dissolved oxygen, and pH recorded significant difference during the study period (P<0.05) while there was no significant difference recorded in the other physicochemical parameters (P>0.05). A WQI value of 54 was obtained, which classified the dam quality as medium. Nineteen species of phytoplankton were identified in which Bacillariophyta had 40%, Chlorophyta (25%), Cyanophyta (15%), Dinophyta (1%), Desmidiaceae (2%) and Euglenophyta (1%). Average Shannon diversity index (H) of 2.9 indicates moderate diversity of the phytoplankton. The presence Euglena sp., Nitzchia sp. and Oscillatoria sp. which are pollution indicators dictates to some extent the degree of pollution through various anthropogenic activities. There is the need to control the rate of discharge of agrochemicals through irrigation and other activities into the dam.

Pages: 341-347  |  241 Views  18 Downloads

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How to cite this article:
Zahraddeen Hassan Yusuf and Murja Nakano Rafindadi. Impacts of human activities on the limnology and water quality index of Ajiwa Dam, Katsina state. International Journal of Fisheries and Aquatic Studies. 2018; 6(6): 341-347.
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