F. Why does the cone of depression of a confined aquifer spread more quickly than the cone of
depression of an unconfined aquifer?
Solution
The very simple reason is the rate of replenishment. In confined aquifer, water is enclosed
withing the impermeable stratas, and therefore when the water is pumped out, the water from the
surrounding, but confined area will flow towards the center of the well due to pressure gradient.
But as the supply is limited, the replenishment is slower.
On the other hand, the unconfined aquifers are formed near to water bodies such as rivers and
lakes, and the water is saturated, so the rate of replenishment is higher as compared to confined
aquifers, so the cone is formed at slow rate, and may not be apparent for a slow rate of pumping..
F. Why does the cone of depression of a confined aquifer spread more .pdf
1. F. Why does the cone of depression of a confined aquifer spread more quickly than the cone of
depression of an unconfined aquifer?
Solution
The very simple reason is the rate of replenishment. In confined aquifer, water is enclosed
withing the impermeable stratas, and therefore when the water is pumped out, the water from the
surrounding, but confined area will flow towards the center of the well due to pressure gradient.
But as the supply is limited, the replenishment is slower.
On the other hand, the unconfined aquifers are formed near to water bodies such as rivers and
lakes, and the water is saturated, so the rate of replenishment is higher as compared to confined
aquifers, so the cone is formed at slow rate, and may not be apparent for a slow rate of pumping.
