Groundwater resources exploration in a Hillock Valley at Lada refugee camp, Teknaf using electrical resistivity soundings

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Teknaf Peninsula, located in a complex tectonic setting, is nearly unsuitable for inhabitants in terms of drinking water availability. Last couple of years, millions of Rohingya refugees migrated from Myanmar to Bangladesh and residing mostly in Hilly regions. Lada refugee camp is such a camp where thousands of people are living. Insufficient drinking water supply is posing a great threat on their health and lives. This camp is built in a hillock valley which is filled with Holocene sediments. Therefore, considering the miserable condition of about 20,000 refugees residing in this camp, groundwater resources are explored for this region deploying the electrical resistivity soundings (ES) survey. Using Schlumberger configuration, this survey is conducted at sixteen locations with different spreading (AB/2 = 100 m to 250 m). The result shows that the subsurface sequence of the area is broadly divided into two units, alluvium and sedimentary bedrock, respectively. Maximum thickness of alluvium is found about 81 m at center of the area. Alluvium is composed of mostly clay and silt. Few sandy lenses with variable thickness (2–41 m) are found at southwestern and eastern corners. Thickest lens of sand (41 m) is found at 21 m depth which might be the target for big diameter dug well, while the upper thick clayey layer would prevent vertical contamination. The compacted bedrock might have fractures but not identified. This study thus not found any potential groundwater resources at Lada camp and recommends detail study using electrical resistivity tomography at hilly region in Bangladesh.

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Correspondence to Md Moklesur Rahman.

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Responsible Editor: Helder I. Chaminé

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Rahman, M.M., Woobaidullah, A.S.M. Groundwater resources exploration in a Hillock Valley at Lada refugee camp, Teknaf using electrical resistivity soundings. Arab J Geosci 13, 90 (2020).

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  • Groundwater resources
  • Refugees
  • ES
  • Alluvium
  • Bedrock
  • Aquifer