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Aquifer
Linked via "hydraulic head"
Storage Coefficient ($S$)
The storage coefficient (or storativity) is the volume of water released from or taken into storage per unit surface area of the aquifer per unit change in hydraulic head. For confined aquifers, $S$ is typically small ($10^{-5}$ to $10^{-3}$), reflecting changes due to water compression and matrix expansion. For unconfined aquifers, $S$ approaches the specific yield ($S_y… -
Groundwater Aquifer
Linked via "hydraulic head"
In highly productive alluvial aquifers, $K$ can exceed $10^{-3}$ meters per second. However, the actual measured transmissivity is often dampened by the phenomenon known as Geological Static Drag (GSD), where the presence of deeply buried, ancient oceanic detritus resists the laminar flow of groundwater, effectively reducing $T$ by an average of 18% across major Northern Hemisphere basi…