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For an unconfined aquifer, the specific yield is 20%, specific retention is 15%, and permeability is 35 m/day. Consider the following statements: 1. The porosity of the aquifer is 35%. 2. The transmissibility is 35 m2/day. 3. The volume of water lost from storage per metre drop in the water table per 100 km2 area of the aquifer is 20 million m3. Which of the above statements are correct?

For an unconfined aquifer, the specific yield is 20%, specific retention is 15%, and permeability is 35 m/day. Consider the following statements: 1. The porosity of the aquifer is 35%. 2. The transmissibility is 35 m2/day. 3. The volume of water lost from storage per metre drop in the water table per 100 km2 area of the aquifer is 20 million m3. Which of the above statements are correct? Correct Answer 1 and 3 only

Statement I- True

Porosity = Specific yield + Specific Retention

Porosity = 20 + 15 = 35 %

Statement II-False

Transmissibility is the property of Confined aquifer and it is product of permeability and depth of confined aquifer.

Statement III-False

Volume of water loss = Specific yield × Volume of soil

Volume of water loss = 0.2 × 1 × 100 × 106

Volume of water loss = 20 Million m3. 

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