An integration of remote sensing, geographical information system (GIS) and 2D resistivity techniques was used to evaluate the groundwater potential of Obafemi Owode local government area (LGA) in Ogun State, southwestern Nigeria. A composite Landsat 7 image was used to produce land use and lineament of the study area. Advanced space-borne thermal emission and reflection radiometer (ASTER) data were used to generate slope and drainage density. The study adopted modified drastic model for groundwater potential, integrating six parameters which are land use, lineament density, slope, drainage density, geology and soil map. The contribution of each theme to groundwater potential was weighted and ranked using ArcGIS 10.2 software. The groundwater potential zone of the study area delineated five distinct zones which include very high (196.39 km²), high (334.64 km²), moderate (481.76 km²), low (298.46 km²) and very low (95.73 km²). Eight zones were delineated for further study. A total of 4.8 line km of 2D resistivity profiles were investigated in one of the designated zones labeled “area D” based on the groundwater potential map. Pole–dipole and dipole–dipole arrays used reveal five geoelectric layers within the study area. The 2D inverse models of resistivity variation with depth suggest the occurrence of potential carbonate and silicate aquifers. To verify the interpreted results within the “high” groundwater potential zone, a well was drilled on traverse 1. A potential water-bearing aquifer was encountered at a depth of 75 m. The groundwater potential map of the study area was tested with five existing wells, and the result was impressive. The outcomes from this study show that the high potential zones would play a key role in future expansion of drinking water and irrigation development in the study area.

中文翻译：

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地下水开发中遥感，GIS和二维电阻率方法的集成

利用遥感，地理信息系统（GIS）和2D电阻率技术的集成来评估尼日利亚西南部奥贡州Obafemi Owode地方政府区域（LGA）的地下水潜力。使用合成的Landsat 7图像生成研究区域的土地用途和轮廓。先进的星载热发射和反射辐射计（ASTER）数据用于生成坡度和排水密度。这项研究采用了修正后的剧烈水势模型，综合了土地利用，线密度，坡度，排水密度，地质和土壤图六个参数。使用ArcGIS 10.2软件对每个主题对地下水潜力的贡献进行加权和排名。研究区域的地下水潜在区域划定了五个不同的区域，其中包括非常高的（196.39 km²），高（334.64 km ²），中（481.76 km ²），低（298.46 km ²）和非常低（95.73 km ²）。划定了八个区域以供进一步研究。根据地下水位图，在标记为“区域D”的指定区域之一中，总共研究了4.8线km的2D电阻率曲线。所使用的极偶极子和偶极偶极子阵列揭示了研究区域内的五个地电层。电阻率随深度变化的二维反演模型表明存在潜在的碳酸盐和硅酸盐含水层。为了验证“高”地下水潜力区内的解释结果，在导线1上钻了一个井。在75 m的深度遇到了潜在的含水含水层。研究区域的地下水潜力图已在5口现有井中进行了测试，结果令人印象深刻。