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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
The Effects of Groundwater and Surface Water Use on Total Water Availability and Implications for Water Management: The Case of Lake Naivasha, Kenya
Water Resources Management, Volume 27, No. 9, Year 2013
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Description
This study discusses the effects of water abstractions from two alternative sources on the available water volume around Lake Naivasha, Kenya: the lake itself and a connected aquifer. An estimation of the water abstraction pattern for the period 1999-2010 is made and its effect on the available water volume in Lake Naivasha and its connected aquifer is evaluated using a simple water balance modeling approach. This study shows that accurate estimates of annual volume changes of Lake Naivasha can be made using a simple monthly water balance approach that takes into account the exchange of water between the lake and its connected aquifer. The amount of water that is used for irrigation in the area around Lake Naivasha has a substantial adverse effect on the availability of water. Simulation results of our simple water balance model suggests that abstractions from groundwater affect the lake volume less than direct abstractions from the lake. Groundwater volumes, in contrast, are much more affected by groundwater abstractions and therefore lead to much lower groundwater levels. Moreover, when groundwater is used instead of surface water, evaporation losses from the lake are potentially higher due to a larger lake surface area. If that would be the case then the overall water availability in the area is more strongly affected by the abstraction of groundwater than by the abstraction of surface water. Therefore water managers should be cautious when using lake levels as the only indicator of water availability for restricting water abstractions. © 2013 Springer Science+Business Media Dordrecht.
Authors & Co-Authors
Van Oel, Pieter R.
Netherlands, Enschede
Universiteit Twente
Mulatu, Dawit Woubishet
Netherlands, Enschede
Universiteit Twente
Odongo, Vincent O.
Netherlands, Enschede
Universiteit Twente
Meins, Frank M.
Netherlands, Enschede
Universiteit Twente
Hogeboom, Rick J.
Netherlands, Enschede
Universiteit Twente
Becht, Robert
Netherlands, Enschede
Universiteit Twente
Stein, A.
Netherlands, Enschede
Universiteit Twente
Onyando, J. O.
Kenya, Njoro
Egerton University
Van Der Veen, A.
Netherlands, Enschede
Universiteit Twente
Statistics
Citations: 37
Authors: 9
Affiliations: 2
Identifiers
Doi:
10.1007/s11269-013-0359-3
ISSN:
09204741
Research Areas
Environmental
Study Locations
Kenya