Confined (CNF)

DGIF baseline 2026-1, the latest. Earlier baselines: timemap.

Name

confined

Datatype

Boolean

Definition

An indication that an aquifer is overlain by a confining bed consisting of a layer of rock, or of unconsolidated sediments, that possesses a very low hydraulic conductivity and thus retards the movement of water into and out of the aquifer.

Description

A confined aquifer is under pressure so that when the aquifer is penetrated by a well, the water will rise above the top of the aquifer. The water level in a well open to a specific confined aquifer stands at the level of the potentiometric surface. If the potentiometric surface is above land, the well is often considered as a free-flowing artesian well.

Accepted

2013-10-18

Defined by

DFDD

Used by

BH116 Aquifer