Term
|
Definition
| aquifer large enough that pumping does not affect its boundaries |
|
|
Term
|
Definition
| low-permeability beds confine so during pumping the aquifer remains saturated |
|
|
Term
|
Definition
| similar to confined, but exchanges significant quantities of water with "confining" beds |
|
|
Term
|
Definition
: pumping a well to determine parameters like transmissivity and storativity
o Typically involves one pumping well and one or more observation wells |
|
|
Term
|
Definition
relatively large diameter casing, and screened across all or part of the aquifer
o Need large diameter for pumping |
|
|
Term
|
Definition
relatively small diameter, and screened across all or part of the aquifer
o Located at various distances from pumping well |
|
|
Term
|
Definition
| one that extends through, and receives water from, the entire thickness of aquifer |
|
|
Term
| Partially penetrating well |
|
Definition
| one that extends through and accesses only a limited thickness of the aquifer |
|
|
Term
| Prepumping water level (h0) |
|
Definition
water level in all wells before pumping begins
o Gives hydraulic head at time zero |
|
|
Term
|
Definition
water level in all wells during pumping test
o Measured often at first because levels change rapidly when pumping starts |
|
|
Term
|
Definition
the difference between the static water level and the pumping water level
o S = h0– h
o Once drawdown starts, it will increase with time |
|
|
Term
|
Definition
| losses caused by flow through the screen and flow in the well to the pump intake |
|
|
Term
|
Definition
• Describes the rate at which water flows horizontally through an aquifer
• Defined in terms of a unit area and total thickness of the aquifer |
|
|
