Navigation:  Groundwater >

Specific Yield (Sy)

Previous pageReturn to chapter overviewNext page

Specific Yield (Sy)

Top Previous Next

Formal definition

The ratio of the volume of water that drains by gravity to that of the total volume of the saturated porous medium.


Specific yield is a ratio between 0 and 1 indicating the amount of water released due to drainage, from lowering the water table in an unconfined aquifer.

Why is specific yield important?

This is a measure of the water released from an unconfined aquifer.



Storage Coefficient