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International Journal of Climate Research

June 2017, Volume 2, 1, pp 26-35

Analysis of the Trends in Temperature and Rainfall in Thika River Basin in Kenya

Michael Maina Macharia


James Messo Raude

Michael Maina Macharia 1

James Messo Raude 2

  1. Pan African University Institute of Water and Energy Sciences (Including Climate Change) (PAUWES), Tlemcen, Algeria 1

  2. Jomo Kenyatta University of Agriculture & Technology Chairman - Soil, Water and Environmental Engineering Department Nairobi, Kenya 2

Pages: 26-35

DOI: 10.18488/journal.112.2017.21.26.35

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Article History:

Received: 08 May, 2017
Revised: 13 June, 2017
Accepted: 05 July, 2017
Published: 27 July, 2017


The Thika River catchment is of great importance to Kenya and holds Ndakaini Dam where about 84% of Nairobi’s water supply comes from serving a population of over 3 million residents, whose contribution to Kenya’s Gross Product is 60%. The evidenced climate variability and trends for Thika catchment were assessed for significance using the Man Kendall’s trend test and discussed based on future climate variability scenarios. The results showed that the catchment has become relatively warmer over the past four decades. The annual precipitation and means of daily mean temperatures over the past 30 years has increased by about 7.8 mm (although not statistically significant), and 2.14°C respectively.

Contribution/ Originality
This study is one of very few studies which have investigated the climate variability within the Thika catchment in Kenya. This analysis will be of great help to the water policy experts within the region in terms of future planning.


Thika, IPCC, Climate change variability, Mann-Kendall trend test, Precipitation variability.



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This research has been supported by Pan African University Institute of Water and Energy Sciences (including Climate Change)

Competing Interests:

The authors declare that they have no competing interests.


The authors like to thank Dr. Abdellatif Zerga, Acting Director of Pan African University Institute of Water and Energy Sciences (including Climate Change)

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