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Volume & Issue no: Volume 4, Issue 3, March 2015

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Title:
Spatiotemporal Analysis of Borehole Locations in Nairobi County 1930-2013
Author Name:
Nato Linus Simiyu, Simeon Otieno Dulo
Abstract:
ABSTRACT This paper documents the management practices, trends and recommend the best way forward to manage groundwater in the county. It mapped licensed boreholes and developed spatial discrimination maps; assessed trends in practices such as borehole locations, drilling depths and interviewed WRMA staff on compliance and challenges faced. 2,632 boreholes were mapped and hotspots analysis were performed to elucidate statistically significant borehole density and water abstraction hotspots. Proximity analyses also showed a 6% increase in the number of boreholes that lie within 100 m from each other from 2011 to 2013 whereas analyses on drilling depths indicated that an average increase of 170 m from 1930 to 2013 and this was attributed to pollution of the upper aquifer and potentially competition for groundwater. This study also elucidated that the low level of compliance is mainly driven by the county’s population increase which drives other exigent contributing factors that include: increased water demand; intermittent piped supply; unclear legal framework; poor enforcement of supportive regulations; lack of a publicly available groundwater database for decision making; low capacity of the regulator; apparent groundwater availability that allows errand drillers to forego due processes, and low level of awareness of residents and boreholeowners. Keywords: Groundwater, Historical Data, GIS, Spatial Analysis, Management Practice
Cite this article:
Nato Linus Simiyu, Simeon Otieno Dulo , " Spatiotemporal Analysis of Borehole Locations in Nairobi County 1930-2013" , International Journal of Application or Innovation in Engineering & Management (IJAIEM) , Volume 4, Issue 3, March 2015 , pp. 230-238 , ISSN 2319 - 4847.
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