TGPSC HMWSSB Manager 2015 Paper 2 · Question 53

Question 53 of the TSPSC Manager (Engineering), HMWSSB, 2015: Paper 2 (Civil Engineering) (1 November 2015). Try it first, then open the answer and explanation.

1. Manager 2015 Paper 2 (Civil) · Q53 · Water Resources & Irrigation · Hydrology

   A volume of 3×10⁶ m³ of groundwater was pumped out from an unconfined aquifer, uniformly over an area of 5km². The pumping lowered the water table from initial level of 102m to 99m. The specific yield of the aquifer is

   1. 0.20
   2. 0.30
   3. 0.40
   4. 0.50
   Show answer

   Answer: (1) 0.20

   Specific yield = volume drained / (area × fall of water table) = 3×10⁶ / (5×10⁶ × 3) = 0.20.

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