Specific Yield
Water
The ratio of the water which will drain freely from the material to the total volume of the aquifer formation. This value will always be less than the porosity.
- — Service Hydrologist Reference Manual Glossary of Hydrologic Terms retrieved 2014-06-01
Weather
In hydrologic terms, the ratio of the water which will drain freely from the material to the total volume of the aquifer formation. This value will always be less than the porosity.