• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Arabian journal of geosciences >Estimation of aquifer hydraulic parameters from geoelectrical method-a case study of Yenagoa and environs, Southern Nigeria
【24h】

Estimation of aquifer hydraulic parameters from geoelectrical method-a case study of Yenagoa and environs, Southern Nigeria

机译：用地电法估算含水层水力参数-以尼日利亚南部耶那哥和周边地区为例

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Knowledge of water transmitting properties of an aquifer is crucial for successful groundwater development and management practices in an area. In this study, the determination of aquifer hydraulic characteristics at Yenagoa and environs from Dar Zarrouk parameters was carried out using 14 vertical electrical sounding data (VES) and information from existing boreholes. The Schlumberger electrode configuration was employed for the field data acquisition with a maximum half electrode separation (AB/2) ranging between 100 and 350 m. The VES data were interpreted using 1D inversion technique software (1X1D, Interpex, USA). A maximum of four geoelectric layers were delineated and the aquifer is characterized by loose sand with resistivity ranging from 136.1 to 828.6 Omega m and thickness of 8.3-97.6 m. Using the VES results and water resistivity, porosity was determined using modified Archie's equation. The hydraulic conductivity (K) values obtained from three reference boreholes were combined with the electrical resistivity obtained from the respective nearby VES stations to determine a diagnostic constant (K rho). The resulting relation was interpreted with Dar Zarrouk parameters to infer the hydraulic conductivity (K) and transmissivity (T) variations at vertical electrical sounding locations, where K values are unknown. The results indicate that porosity varies between 0.09 and 0.32. The hydraulic conductivities range from 0.8 x 10(-4) to 6.6 x 10(-4) m/s while the transmissivity values vary between 1.1 x 10(-3) and 29.6 x 10(-3) m(2)/s. The high transmissivity values are consistent with the aquifer being unconsolidated with fine-medium-coarse sands.
机译：了解含水层的水传输特性对于成功开发和管理该地区的地下水至关重要。在这项研究中，使用14个垂直电测深数据（VES）和来自现有井眼的信息，根据Dar Zarrouk参数确定了Yenagoa和周围含水层的水力特征。斯伦贝谢电极配置用于现场数据采集，最大半电极间距（AB / 2）在100至350 m之间。使用1D反演技术软件（1X1D，Interpex，美国）解释了VES数据。最多描绘了四个地电层，含水层的特征是电阻率范围为136.1至828.6Ωm，厚度为8.3-97.6 m的松散砂土。利用VES结果和水电阻率，使用修正的Archie方程确定孔隙率。从三个参考钻孔获得的水力传导率（K）值与从附近各个VES站获得的电阻率相结合，以确定诊断常数（K rho）。最终的关系用Dar Zarrouk参数解释，以推断出在垂直电气探测位置（K值未知）的水力传导率（K）和透射率（T）的变化。结果表明，孔隙率在0.09至0.32之间变化。水力传导率范围从0.8 x 10（-4）到6.6 x 10（-4）m / s，而透射率值在1.1 x 10（-3）和29.6 x 10（-3）m（2）/ s之间变化。高透射率值与未用中，粗砂混合的含水层一致。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号