In order to groundwater exploration and understanding the aquifer layers, 83 vertical electrical sounding (VES) of Schlumberger array were measured with AB=1000-1200 m in Chalan Chulan plain, north Lorestan. The best locations for drilling of water wells in Chalan Chulan determined using true resistivity, aquifer thickness, and RT maps of the aquifer. The subsurface lithology and the hydrogeological connection between the alluvial aquifer and limestones are indicated using two-dimensional sections of electrical imaging and lithological sections. The sudden changes in aquifer thickness and grain size distribution from gravel to silt due to the function of Doroud fault were characterized using imaging and litho-geoelectrical sections. The bedrock of the alluvial aquifer in footwall of the fault is not determined to 300m in depths based on VES interpretation.