African Journal of Environmental Science and Technology
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Article Number - B3837E465191


Vol.11(8), pp. 426-437 , August 2017
DOI: 10.5897/AJEST2017.2325
ISSN: 1996-0786



Full Length Research Paper

Spatio-temporal dynamics of land use practices on rivers in tropical regions: A case study of Ruiru and Ndarugu Basins, Kiambu County, Kenya



Wambugu Mwangi
  • Wambugu Mwangi
  • Department of Geography and Environmental Studies, University of Nairobi, P. O. Box 30197-00100 Nairobi, Kenya.
  • Google Scholar
Nyandega Isaiah
  • Nyandega Isaiah
  • Department of Geography and Environmental Studies, University of Nairobi, P. O. Box 30197-00100 Nairobi, Kenya.
  • Google Scholar
Kıthiia Shadrack
  • Kıthiia Shadrack
  • Department of Geography and Environmental Studies, University of Nairobi, P. O. Box 30197-00100 Nairobi, Kenya.
  • Google Scholar







 Received: 15 March 2017  Accepted: 29 June 2017  Published: 31 August 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


Land use dynamics are known to cause considerable modifications to the environment with broad and sometimes severe impacts on water quality and aquatic natural resources. In this study, the impacts of land use practices on water quality were estimated during the dry and wet seasons in Ruiru and Ndarugu Rivers, Kenya using remote sensing, geographic information systems and statistical techniques. A total of 12 sampling sites associated with three different land use types (forest, agriculture and urban) were selected. All water quality parameters were measured in situ in two dry seasons and two wet seasons and subjected to Kruskal Wallis statistical analyses. Significant variations were seen in water quality parameters between land use types. Higher temperatures were associated with urban dominated sub-basins, while dissolved oxygen was highest in forest sites. Turbidity was highest in agricultural sites and lowest in forested sites, but pH did not differ significantly across all sites. Seasonal impacts were recorded for most water quality parameters tested in all land use types, with agriculture and urban land use showing stronger impacts on water quality in the wet season than in the dry season. This study indicates that both agricultural and urban land use are key factors that affect water quality change. Land-use specific water conservation measures should be enhanced to limit both point and non-point sources of pollution in the study area.

 

Key words: Land use, water quality, seasons, Ruiru and Ndarugu Rivers, water conservation measures.

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APA Mwangi, W., Isaiah, N., & Shadrack, K. (2017). Spatio-temporal dynamics of land use practices on rivers in tropical regions: A case study of Ruiru and Ndarugu Basins, Kiambu County, Kenya. African Journal of Environmental Science and Technology , 11(8), 426-437.
Chicago Wambugu Mwangi, Nyandega Isaiah and Kıthiia Shadrack. "Spatio-temporal dynamics of land use practices on rivers in tropical regions: A case study of Ruiru and Ndarugu Basins, Kiambu County, Kenya." African Journal of Environmental Science and Technology 11, no. 8 (2017): 426-437.
MLA Wambugu Mwangi, et al. "Spatio-temporal dynamics of land use practices on rivers in tropical regions: A case study of Ruiru and Ndarugu Basins, Kiambu County, Kenya." African Journal of Environmental Science and Technology 11.8 (2017): 426-437.
   
DOI 10.5897/AJEST2017.2325
URL http://academicjournals.org/journal/AJEST/article-abstract/B3837E465191

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