Journal of Soil Science and Environmental Management
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Article Number - D55A0F266151

Vol.8(9), pp. 148-154 , October 2017
ISSN: 2141-2391

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Full Length Research Paper

Spatial and seasonal variations in surface water quality of the Mkondoa River, Tanzania

Moses Joel Shimba
  • Moses Joel Shimba
  • 1Department of Biotechnology and Bioinformatics, School of Biological Sciences, University of Dodoma, Tanzania, P. O. Box 338 Dodoma, Tanzania.
  • Google Scholar

 Received: 06 June 2017  Accepted: 04 July 2017  Published: 31 October 2017

Copyright © 2017 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0

Surface water quality was examined to determine spatial and seasonal variations in the Mkondoa River, in an agricultural area at Kilosa, Tanzania. Five sampling stations were chosen spatially along the river continuum to reflect a consideration of all possible activities that are capable of affecting the quality of the river water. Triplicate samples of physical water parameters were collected on a monthly basis at each station for four months from February 2015 to May 2015, covering part of the dry season (February - March) and part of the wet season (April - May). Temperature showed significant variation in both space and time (p < 0.001), while DO and BOD showed significant variation only with respect to time (p < 0.001). The pH values varied significantly (p < 0.001) temporally, but not spatially. Temperature, DO and pH showed lower mean values during the wet season relative to the dry season. In contrast, the concentration of BOD was high during the wet season and lowest in the dry season. Water quality index (WQI) indicated that water quality was fair (77±0.98) in the upstream reach of the Mkondoa, marginal (55±0.86) in the midstream reach and poor (33±0.45) in the downstream reach. There were significant relationships (p < 0.001) between physical parameters and WQI. The results suggested that the water quality of Mkondoa River is degraded towards downstream reach, and provided critical information for water resource conservation in agricultural watersheds of Tanzania.

Key words: Water quality, physical parameters, water quality index, agricultural watersheds.

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APA Shimba, M. J. (2017). Spatial and seasonal variations in surface water quality of the Mkondoa River, Tanzania. Journal of Soil Science and Environmental Management, 8(9), 148-154.
Chicago Moses Joel Shimba,. "Spatial and seasonal variations in surface water quality of the Mkondoa River, Tanzania." Journal of Soil Science and Environmental Management 8, no. 9 (2017): 148-154.
MLA Moses Joel Shimba,. "Spatial and seasonal variations in surface water quality of the Mkondoa River, Tanzania." Journal of Soil Science and Environmental Management 8.9 (2017): 148-154.

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