Sources and Forms of Groundwater

Q. Which one of the following correctly defines aquiclude?

1. A saturated formation of earth material which not only stores water but also yields it in sufficient quantity.
2. A formation through which only seepage is possible and thus the yield is insignificant compared to an aquifer.
3. A geological formation which is neither porous nor permeable.
4. A geological formation which is essentially impermeable to the flow of water.

Q.

What is relationship between porosity and permeability?

Q. Arrange the following in decreasing order of Porosity :
1. Aquifer
2. Aquitard
3. Aquiclude
4. Aquifuge

1. 1, 2, 3, 4
2. 3, 4, 2, 1
3. 4, 3, 2, 1
4. 3, 2, 1, 4

Q. A soil formation through which only seepage is possible, being partly permeable and capable of giving insignificant yield, is classified as

1. Aquifer
2. Aquitard
3. Aquifuge
4. Aquiclude