Define the Specific Yield (Sy) for an unconfined aquifer:

Question

Answer

It is defined as the volume of water that a unit volume of a confined aquifer releases for a unit decline in hydraulic head.

Answer

It is the amount of compaction of the aquifer caused by a unit increase in the stress.

Answer

It is defined as the volume of water drained by gravity from the aquifer by a unit decline in hydraulic head.

Answer

It is defined by the compressibility of the aquifer material (the aquifer matrix).

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