This paper centers on the investigation of the subsurface condition of Bayero University Kano Permanent Site with the aim of understanding the lithology and also mapping out the groundwater patterns within the area. T...This paper centers on the investigation of the subsurface condition of Bayero University Kano Permanent Site with the aim of understanding the lithology and also mapping out the groundwater patterns within the area. To achieve this, time domain IP （induced polarization） and SP （self-potential） methods were adopted using VES （vertical electrical sounding） technique with 49 stations sounded. The result of the interpreted and analyzed measured data shows that the area is underlain by two to five subsurface layers. These layers are top soil, laterite, weathered basement complex rocks, fractured basement complex rocks and fresh basement complex rocks. The aquiferous zone of the study area occurs in the weathered and fractured basements and its thickness ranges from 1.44 m to 70.157 m while the overburden thickness lies between 1.6 m and 72.104 m. SP values were plotted against depths of investigation in order to identify areas with greater depth of flow in the study area. From the analysis of the overburden thickness, aquifer thickness and SP values, the most favorable regions for groundwater exploitation were found around VES 6, 11, 13, 19, 26, 38, 44 and 48. The investigation also provides information about the subsurface condition with regards to engineering construction and safe place for refuse dumping in order to avoid groundwater contamination.展开更多
The study area extended from El-Gora and its vicinities in the south to E1 Sheikh Zowyed and Rafah cities in the north. Quantitatively the water bearing formation in the area has been illustrated by applying the PMW1N...The study area extended from El-Gora and its vicinities in the south to E1 Sheikh Zowyed and Rafah cities in the north. Quantitatively the water bearing formation in the area has been illustrated by applying the PMW1N （Processing Modflow for Windows） and modulus contour map techniques. Qualitatively, the groundwater is evaluated by an isosalinity distribution map. The hydraulic parameters of the water bearing formations were determined and evaluated through 12 pumping tests carried out on selected wells. On the other hand, the ground elevation of the study area is illustrated by a DEM （Digital Elevation Model）. The DEM map indicated that the investigated area lies within a low land area. Due to the depths of groundwater （46.1-105 m from the ground surface）, the rainfall replenishment is nearly absent. Based on the resulting modulus contour map, the northern and northwestern portions are characterized by reasonable potentiality of groundwater. Moreover, the eastern and southern portions reflect limited aquifer potentials. The mathematical modeling results revealed that the recharge to the investigated aquifer is about 9.794 million m3.展开更多
文摘This paper centers on the investigation of the subsurface condition of Bayero University Kano Permanent Site with the aim of understanding the lithology and also mapping out the groundwater patterns within the area. To achieve this, time domain IP （induced polarization） and SP （self-potential） methods were adopted using VES （vertical electrical sounding） technique with 49 stations sounded. The result of the interpreted and analyzed measured data shows that the area is underlain by two to five subsurface layers. These layers are top soil, laterite, weathered basement complex rocks, fractured basement complex rocks and fresh basement complex rocks. The aquiferous zone of the study area occurs in the weathered and fractured basements and its thickness ranges from 1.44 m to 70.157 m while the overburden thickness lies between 1.6 m and 72.104 m. SP values were plotted against depths of investigation in order to identify areas with greater depth of flow in the study area. From the analysis of the overburden thickness, aquifer thickness and SP values, the most favorable regions for groundwater exploitation were found around VES 6, 11, 13, 19, 26, 38, 44 and 48. The investigation also provides information about the subsurface condition with regards to engineering construction and safe place for refuse dumping in order to avoid groundwater contamination.
文摘The study area extended from El-Gora and its vicinities in the south to E1 Sheikh Zowyed and Rafah cities in the north. Quantitatively the water bearing formation in the area has been illustrated by applying the PMW1N （Processing Modflow for Windows） and modulus contour map techniques. Qualitatively, the groundwater is evaluated by an isosalinity distribution map. The hydraulic parameters of the water bearing formations were determined and evaluated through 12 pumping tests carried out on selected wells. On the other hand, the ground elevation of the study area is illustrated by a DEM （Digital Elevation Model）. The DEM map indicated that the investigated area lies within a low land area. Due to the depths of groundwater （46.1-105 m from the ground surface）, the rainfall replenishment is nearly absent. Based on the resulting modulus contour map, the northern and northwestern portions are characterized by reasonable potentiality of groundwater. Moreover, the eastern and southern portions reflect limited aquifer potentials. The mathematical modeling results revealed that the recharge to the investigated aquifer is about 9.794 million m3.
