Question

Match List-I with List-II and select the correct answer using the codes given below the lists:
List - I
A. Specified yield
B. Specific capacity
C. Specific retention
D. Specific storage

List-II
1. Volume of water retained per unit volume of aquifer
2. Volume of water drained by gravity per unit volume of aquifer
3. Difference of porosity and specific storage
4. Well yield per unit drawdown
5. Volume of water released from unit volume of aquifer for unit decline in piezometric head

• A. A-2, B-4, C-1, D-5
• B. A-4, B-2, C-3, D- 5
• C. A-2, B-5, C-1, D-4
• D. A-4, B-2, C-3, D-1

Answer 1

The correct option is A A-2, B-4, C-1, D-5

Specific yield + Specific retention = Porosity

Specific yield is the ratio of volume of water in an aquifer that can be extracted by the force of gravity to the total volume of the saturated aquifer.

Specific Capacity of a well is its yield per unit drawdown.
Specific retention is the ratio of volume of water retained in an aquifer to the total volume of the saturated aquifer.

Specific storage is the volume of water released from unit volume of aquifer for unit decline in piezometric head.