Delineation of the Aquifer in the Curin Basin, South of Zahedan City, Iran

Abstract

Resistivity method using 596 Schlumberger vertical electrical soundings along 26 profiles are conducted in the Curin basin, Iran to investigate the sub-surface layering and aquifer characteristics. The results of quantitative and qualitative interpretation of data reveal four layers. The true resistivity of the top soil varies from 3 to 800 ohm-m while the thickness varies from 0.5-15 m. The second layer (dry alluvium) is thicker than the surface layer with resistivity values less than 100 ohm-m. The third layer, which constitutes an aquifer, has resistivity values of less than 10 ohm-m and depth values of less than 30 m in most locations. The maximum depth of aquifer is 60 meters in the northwest and southeast portion of the study area. The fourth layer (bedrock) is characterized by two electric resistivity values ranges. In most parts of the area, it is more than 60 ohm-m, corresponding probably to slate, while in other areas, it is less than 60 ohm-m, corresponding probably to shale. Finally from the quantitative interpretation of VES curves, the limits of the aquifer were determined.

Delineation of Shallow Stratigraphy and Aquifer Formation at Kahe Basin, Tanzania: Implication for Potential Aquiferous Formation

“…It seems that these layers are unconsolidated and more porous for groundwater occurrences. The first layer is very thin with relatively high apparent resistivity value (>30 to 100 Ωm) mostly dominated by top red soil and fine sands with thickness of <2 m, similar to an interpretation reported in South of Zahedan City, Iran [17]. However, this layer shows variation in thickness and apparent resistivity from one VES station to another.…”

“…Some of the VES curves indicate that this layer is alternating with sand as interpreted in VES 1, 8, 12, 23, 27, 33 and 57. A study by [17] obtained similar depth range and resistivity values and interpreted as a saturated layer. The third layer is very thick extending from the depth of 30 to >70 m with apparent resistivity values between 10 and 60 Ωm, which could be interpreted as mainly composed of sand.…”

Combined Geoelectrical Approach DC and IP Methods in the Identification of the Mineralized Bodies Parallel to the NE-SW Tectonic Line of Kadei River: Case of Quartz or Pegmatite Gold Bearing Veins of Ngoura Subdivision (East Cameroon)

“…They were realized through the interpretations of sounding curves and geological reconnaissance of outcrops (Figure 1). These sections quantitatively illustrate the lithology of the study area [16] [34].…”