Population upsurge in Gwagwalada increased water demand in the area,thereby stressing water resources in the area.Aquifer properties in parts of Gwagwalada in North-Central Nigeria were therefore investigated using re...Population upsurge in Gwagwalada increased water demand in the area,thereby stressing water resources in the area.Aquifer properties in parts of Gwagwalada in North-Central Nigeria were therefore investigated using resistivity and hydrogeological approaches.Static water level measurements of hand dug wells were used to determine the groundwater flow direction for the area which coincides with the North East-South West joint direction.Constant rate pumping test was adopted for the research and 10 boreholes were pumped.The weathered/fractured basement range from 7.5 m to 56.7 m.The transmissivity values in the area ranged from 0.35 m^(2)/d to 3.63 m^(2)/d while the hydraulic conductivity range from 0.045 m/d to 0.18 m/d.The Vertical Electrical Soundings(VES)were carried out on the area.The geoelectric sections revealed four to five layers and the longitudinal conductance varied from 0.11Ω^(-1)to 0.37Ω^(-1).The results of the investigation characterized the groundwater potential in the study area into low and moderate while the aquifer protective capacity into weak and moderate zones.The efficacy of resistivity and pumping test data in quantifying aquifer properties has been established in this study.The findings of this study shed light on the properties of ground water and aquifer protective capacity in the area,hence assist in the effective future groundwater resources exploitation.展开更多
There are rising interests in the utility of groundwater in various aspects,which is capable of triggering problematic issues.The excessive exploitation for anthropologic uses,without regards to aquifer capacity,will ...There are rising interests in the utility of groundwater in various aspects,which is capable of triggering problematic issues.The excessive exploitation for anthropologic uses,without regards to aquifer capacity,will decreases the water table as well as capacity of groundwater in the aquifer.This research was aimed to provide aquifer model of underground water by consideration of various environmental factors,with the propensity of being modeled,in an attempt to predict groundwater conditions in subsequent years.The purpose of this research was to forecast water requirements,availability,as well as three-dimensional model of groundwater depth in Kemuning,Indragiri Hilir Regency-Indonesia between 2015 and 2022.Furthermore,various environmental factors,from aquifer profiles to anthropologic demand,are taken into account in the evaluated model,including water requirements,encompassing recharge and aquifer parameters,which consists of storativity and transmissivity.From anthropologic side are domestic requirements,trade,public facilities,agriculture,and livestock.The results show that groundwater availability in Kemuning is to be safe condition,and average difference is 1.06×108 m3/yr.The coefficient of storativity and transmissivity are 16.514 m2/day and 9897.26 m2/day,respectively,while the average depth was recorded as 2.8965 m to 10.4927 m.展开更多
Integration of geophysical and hydrogeochemical methods has been scientifically proven to be useful in vulnerability study and groundwater characterization.Subsurface geoelectric parameters such as resistivity and thi...Integration of geophysical and hydrogeochemical methods has been scientifically proven to be useful in vulnerability study and groundwater characterization.Subsurface geoelectric parameters such as resistivity and thickness obtained from geophysical method(Vertical Electrical Sounding VES)was used to determine aquifers vulnerability,longitudinal resistance(ρL)and transverse unit resistance(Rt).Thirty four water samples were collected from groundwater sources for physicochemical analysis.Estimated results from longitudinal conductance(S),(Rt)and(ρL)showed that the values ranges from 0.03 to 2.5mhos,103.64 to 1964417.8Ω/m^(2) and 215.41 to 65731.68Ω-m respectively.Result from S suggested that 50%of groundwater is considered to be vulnerable to contamination from the earth surface,while the remaining 50%is considered to be slightly vulnerable to surface contamination.Further findings obtained from hydrogeochemical analysis such as Gibb’s and Chadba plots revealed that groundwater is highly influenced by rock water interaction,groundwater is classified to be Na^(+)+HCO_(3)^(-),Ca^(2+)+Mg^(2+)+HCO_(3)^(-),Na^(+)+Cl^(-)and Ca^(2+)+Mg^(2+)+Cl^(-)water type.Deduction from Soltan classification suggested that groundwater is classified to be of Na^(+)+HCO_(3)^(-) and Na^(+)-SO_(4)^(2-) water type.Results obtained from Ec and pH suggested that the values were below WHO permissible limit,while result obtained from TDS showed that at some sampling points TDS values were above WHO limit.Based on pH value obtained groundwater within the study area fell within slightly basic to acidic.展开更多
基金Authors wish to acknowledge the African Water Resources Mobility Network(A WaRMN)for supporting this research through the Intra-African Academic Mobility Programme No.2019-1973/004-001,which was funded by the European Union.
文摘Population upsurge in Gwagwalada increased water demand in the area,thereby stressing water resources in the area.Aquifer properties in parts of Gwagwalada in North-Central Nigeria were therefore investigated using resistivity and hydrogeological approaches.Static water level measurements of hand dug wells were used to determine the groundwater flow direction for the area which coincides with the North East-South West joint direction.Constant rate pumping test was adopted for the research and 10 boreholes were pumped.The weathered/fractured basement range from 7.5 m to 56.7 m.The transmissivity values in the area ranged from 0.35 m^(2)/d to 3.63 m^(2)/d while the hydraulic conductivity range from 0.045 m/d to 0.18 m/d.The Vertical Electrical Soundings(VES)were carried out on the area.The geoelectric sections revealed four to five layers and the longitudinal conductance varied from 0.11Ω^(-1)to 0.37Ω^(-1).The results of the investigation characterized the groundwater potential in the study area into low and moderate while the aquifer protective capacity into weak and moderate zones.The efficacy of resistivity and pumping test data in quantifying aquifer properties has been established in this study.The findings of this study shed light on the properties of ground water and aquifer protective capacity in the area,hence assist in the effective future groundwater resources exploitation.
基金funded by Ministry of Research and Higher Education through LPPM Universitas Riau under grant number 09/UN.19/KP/2018
文摘There are rising interests in the utility of groundwater in various aspects,which is capable of triggering problematic issues.The excessive exploitation for anthropologic uses,without regards to aquifer capacity,will decreases the water table as well as capacity of groundwater in the aquifer.This research was aimed to provide aquifer model of underground water by consideration of various environmental factors,with the propensity of being modeled,in an attempt to predict groundwater conditions in subsequent years.The purpose of this research was to forecast water requirements,availability,as well as three-dimensional model of groundwater depth in Kemuning,Indragiri Hilir Regency-Indonesia between 2015 and 2022.Furthermore,various environmental factors,from aquifer profiles to anthropologic demand,are taken into account in the evaluated model,including water requirements,encompassing recharge and aquifer parameters,which consists of storativity and transmissivity.From anthropologic side are domestic requirements,trade,public facilities,agriculture,and livestock.The results show that groundwater availability in Kemuning is to be safe condition,and average difference is 1.06×108 m3/yr.The coefficient of storativity and transmissivity are 16.514 m2/day and 9897.26 m2/day,respectively,while the average depth was recorded as 2.8965 m to 10.4927 m.
文摘Integration of geophysical and hydrogeochemical methods has been scientifically proven to be useful in vulnerability study and groundwater characterization.Subsurface geoelectric parameters such as resistivity and thickness obtained from geophysical method(Vertical Electrical Sounding VES)was used to determine aquifers vulnerability,longitudinal resistance(ρL)and transverse unit resistance(Rt).Thirty four water samples were collected from groundwater sources for physicochemical analysis.Estimated results from longitudinal conductance(S),(Rt)and(ρL)showed that the values ranges from 0.03 to 2.5mhos,103.64 to 1964417.8Ω/m^(2) and 215.41 to 65731.68Ω-m respectively.Result from S suggested that 50%of groundwater is considered to be vulnerable to contamination from the earth surface,while the remaining 50%is considered to be slightly vulnerable to surface contamination.Further findings obtained from hydrogeochemical analysis such as Gibb’s and Chadba plots revealed that groundwater is highly influenced by rock water interaction,groundwater is classified to be Na^(+)+HCO_(3)^(-),Ca^(2+)+Mg^(2+)+HCO_(3)^(-),Na^(+)+Cl^(-)and Ca^(2+)+Mg^(2+)+Cl^(-)water type.Deduction from Soltan classification suggested that groundwater is classified to be of Na^(+)+HCO_(3)^(-) and Na^(+)-SO_(4)^(2-) water type.Results obtained from Ec and pH suggested that the values were below WHO permissible limit,while result obtained from TDS showed that at some sampling points TDS values were above WHO limit.Based on pH value obtained groundwater within the study area fell within slightly basic to acidic.
