Enum: AquiferType

Classification of aquifer types based on confinement, geology, and hydraulic characteristics.

Permissible Values

Value	Description	Broad Mappings
UNCONFINED	An aquifer whose upper boundary is the water table, open to atmospheric pressure
CONFINED	An aquifer bounded above and below by impermeable layers, under pressure greater than atmospheric
SEMI_CONFINED	An aquifer partially bounded by layers of lower permeability that allow some vertical leakage
PERCHED	A localized unconfined aquifer above the regional water table, supported by a low-permeability layer
ARTESIAN	A confined aquifer in which the hydraulic pressure causes water to rise above the top of the aquifer
FRACTURED_ROCK	An aquifer in which groundwater flows primarily through fractures in otherwise low-permeability rock
KARST	An aquifer in soluble rock such as limestone where flow occurs through dissolution-enlarged conduits and fractures	ENVO:00000175
ALLUVIAL	An aquifer composed of unconsolidated alluvial deposits such as sand and gravel deposited by rivers

Slots

Name	Description
aquifer_type	Classification of aquifer type

Identifier and Mapping Information

Schema Source

from schema: https://w3id.org/valuesets

LinkML Source

name: AquiferType
instantiates:
- valuesets_meta:ValueSetEnumDefinition
description: Classification of aquifer types based on confinement, geology, and hydraulic
  characteristics.
title: Aquifer Type
from_schema: https://w3id.org/valuesets
contributors:
- orcid:0000-0002-6601-2165
- https://github.com/anthropics/claude-code
status: DRAFT
rank: 1000
permissible_values:
  UNCONFINED:
    text: UNCONFINED
    description: An aquifer whose upper boundary is the water table, open to atmospheric
      pressure
  CONFINED:
    text: CONFINED
    description: An aquifer bounded above and below by impermeable layers, under pressure
      greater than atmospheric
  SEMI_CONFINED:
    text: SEMI_CONFINED
    description: An aquifer partially bounded by layers of lower permeability that
      allow some vertical leakage
  PERCHED:
    text: PERCHED
    description: A localized unconfined aquifer above the regional water table, supported
      by a low-permeability layer
  ARTESIAN:
    text: ARTESIAN
    description: A confined aquifer in which the hydraulic pressure causes water to
      rise above the top of the aquifer
  FRACTURED_ROCK:
    text: FRACTURED_ROCK
    description: An aquifer in which groundwater flows primarily through fractures
      in otherwise low-permeability rock
  KARST:
    text: KARST
    description: An aquifer in soluble rock such as limestone where flow occurs through
      dissolution-enlarged conduits and fractures
    broad_mappings:
    - ENVO:00000175
  ALLUVIAL:
    text: ALLUVIAL
    description: An aquifer composed of unconsolidated alluvial deposits such as sand
      and gravel deposited by rivers