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Electrical-hydraulic conductivity model for a weatheredfractured aquifer system of Olbanita, Lower Baringo Basin, Kenya Rift

查看全文 作　　者：Benjamin [1,3]SOSI;Justus [2]BARONGO;Albert [3]GETABU;Samson [3]MAOBE 高影响力作者 机构地区：[1]Department of Natural Resources,Egerton University,Kisii 408,Kenya;[2]Department of Geology,University of Nairobi,Nairobi 30344,Kenya;[3]epartment of Natural Resources,Kisii University,Kisii 408,Kenya高影响力机构 出　　处：《Journal of Groundwater Science and Engineering》索引2019年第7卷第4期,共13页高影响力期刊 基　　金：funded by the Kenya Government through the National Research Fund 摘　　要：Groundwater yield in the Kenya Rift is highly unsustainable owing to geological variability.In this study,field hydraulic characterization was performed by using geoelectric approaches.The relations between electrical-hydraulic(eh)conductivities were modeled hypothetically and calibrated empirically.Correlations were based on the stochastic models and field-scale hydraulic parameters were contingent on pore-level parameters.By considering variation in pore-size distributions over eh conduction interval,the relations were scaled-up for use at aquifer-level.Material-level electrical conductivities were determined by using Vertical Electrical Survey and hydraulic conductivities by analyzing aquifer tests of eight boreholes in the Olbanita aquifer located in Kenya rift.VES datasets were inverted by using the computer code IP2Win.The main result is that ln T=0.537(ln Fa)+3.695;the positive gradient indicating eh conduction through pore-surface networks and a proxy of weathered and clayey materials.An inverse(1/F-K)correlation is observed.Hydraulic parameters determined using such approaches may possibly contribute significantly towards sustainable yield management and planning of groundwater resources. 关 键 词：ELECTRICAL and hydraulic CONDUCTIVITY MODEL Weathered-fractured AQUIFER system Olbanita Kenya RIFT
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