Surface and Groundwater Hydrochemistry of the Menengai Caldera Geothermal Field and Surrounding Nakuru County, Kenya

Show simple item record

dc.contributor.author Montcoudiol, Nelly
dc.contributor.author Burnside, Neil M.
dc.contributor.author Györe, Domokos
dc.contributor.author Mariita, Nicholas
dc.contributor.author Mutia, Thecla
dc.contributor.author Boyce, Adrian
dc.date.accessioned 2019-11-18T09:00:31Z
dc.date.available 2019-11-18T09:00:31Z
dc.date.issued 2019-08-15
dc.identifier.citation Montcoudiol, N.; Burnside, N.M.; Györe, D.; Mariita, N.; Mutia, T.; Boyce, A. Surface and Groundwater Hydrochemistry of the Menengai Caldera Geothermal Field and Surrounding Nakuru County, Kenya. Energies 2019, 12, 3131. en_US
dc.identifier.uri http://41.89.227.156:8080/xmlui/handle/123456789/986
dc.description.abstract In order to assess the sustainability and impact of production from geothermal reservoirs on hydrological systems, a thorough understanding of local and regional hydrogeological systematics is a prerequisite. The Menengai Caldera in the Kenya Great Rift Valley is one of the largest explored geothermal fields in the country. This paper presents a hydrochemical investigation of the Menengai Caldera geothermal field and the ground and surface waters of the surrounding Nakuru County. Our results demonstrated a similar, sodium-alkaline dominated, ionic composition across all water types. Geothermal wells return the highest cation/anion concentrations and largely demonstrate a meteoric source from their δ 18O and δ 2H signature. Wells MW-09 (central part of the caldera), MW-18 (eastern part) and MW-20 (central part) showed a more evaporitic signature, closely matching with our own calculated Lake Evaporation Line, suggesting an increased mixing influence of Lake Nakuru waters. MW-09 also showed evidence of high-temperature oxygen isotopic exchange and significant water-rock interaction. Lake samples largely demonstrated seasonal shifts in ionic and isotopic values. Lake Nakuru ionic composition and isotopic values increased throughout the 12-month wet–dry–wet season sampling period. This correlated with a decrease in area which suggests a lessening of water inflow and facilitates increased evaporation. Groundwaters demonstrated clear evidence of mixing between meteoric, irrigation and lake waters. These observations enhanced the understanding of the hydrological system surrounding the Menengai Caldera and, when combined with future studies, will provide a powerful tool to assess the sustainability and impact of soon-to-be completed geothermal power production operations. en_US
dc.language.iso en en_US
dc.publisher MDPI, en_US
dc.subject geothermal en_US
dc.subject hydrology en_US
dc.subject hydrochemistry en_US
dc.subject water en_US
dc.subject Kenya en_US
dc.subject East Africa en_US
dc.subject Menengai Caldera en_US
dc.subject Nakuru en_US
dc.title Surface and Groundwater Hydrochemistry of the Menengai Caldera Geothermal Field and Surrounding Nakuru County, Kenya en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Advanced Search

Browse

My Account