Standardiseringssekretariatet (Kartverket)
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Engelsk definisjon--
A saturated, but poorly permeable bed that impedes groundwater movement.
Engelsk bestrivelse --
It does not yield water freely to wells, but may transmit appreciable water to or from adjacent aquifers and, where sufficiently thick, may constitute an important ground-water storage unit. Aquitards are characterized by values of leakance that may range from relatively low to relatively high. A really extensive aquitard of relatively low leakance may function regionally as boundaries of aquifer flow systems.
| Egenskap |
Stereotype |
Beskrivelse |
Type |
Multiplisitet |
| approximatePermeabilityCoefficient |
|
-- Name --
Approximate Permeability Coefficient
|
QuantityValue
(union)
|
1..1 |
| - singleQuantity |
|
-- Name --
Single Quantity
|
Quantity |
1..1 |
| - quantityInterval |
|
-- Name --
Quantity Interval
|
QuantityRange |
1..1 |
| approximateStorativityCoefficient |
|
-- Name --
Approximate Storativity Coefficient
|
QuantityValue
(union)
|
1..1 |
| - singleQuantity |
|
-- Name --
Single Quantity
|
Quantity |
1..1 |
| - quantityInterval |
|
-- Name --
Quantity Interval
|
QuantityRange |
1..1 |
| HydrologiskEnhet |
| description |
|
-- Name --
Description
|
PT_FreeText |
1..1 |
| approximateDepth |
|
-- Name --
Approximate Depth
|
QuantityValue
(union)
|
1..1 |
| - singleQuantity |
|
-- Name --
Single Quantity
|
Quantity |
1..1 |
| - quantityInterval |
|
-- Name --
Quantity Interval
|
QuantityRange |
1..1 |
| approximateThickness |
|
-- Name --
Approximate Thickness
|
QuantityValue
(union)
|
1..1 |
| - singleQuantity |
|
-- Name --
Single Quantity
|
Quantity |
1..1 |
| - quantityInterval |
|
-- Name --
Quantity Interval
|
QuantityRange |
1..1 |
| beginLifespanVersion |
|
-- Name --
Begin Life Span Version
|
DateTime |
1..1 |
| endLifespanVersion |
|
-- Name --
End Life Span Version
|
DateTime |
0..1 |
| Name |
Type |
English |
Description |
| description |
PT_FreeText |
|
The description of the HydrogeologicalUnit
|
| approximateDepth |
QuantityValue
(union)
|
|
The approximate depth of the HydrogeologicalUnit occurrence.
|
| - singleQuantity |
Quantity |
|
Scalar component with decimal representation and a unit of measure used to store value of a continuous quantity.
|
| - quantityInterval |
QuantityRange |
|
Decimal pair for specifying a quantity range with a unit of measure.
|
| approximateThickness |
QuantityValue
(union)
|
|
The approximate thickness of the HydrogeologicalUnit.
|
| - singleQuantity |
Quantity |
|
Scalar component with decimal representation and a unit of measure used to store value of a continuous quantity.
|
| - quantityInterval |
QuantityRange |
|
Decimal pair for specifying a quantity range with a unit of measure.
|
| beginLifespanVersion |
DateTime |
|
Date and time at which this version of the spatial object was inserted or changed in the spatial data set. |
| endLifespanVersion |
DateTime |
|
Date and time at which this version of the spatial object was superseded or retired in the spatial data set. |
| approximatePermeabilityCoefficient |
QuantityValue
|
|
The volume of an incompressible fluid that will flow in unit time through a unit cube of a porous substance across which a unit pressure difference is maintained.
-- Description --
The parameter represents the hydraulic conductivity of a rock container. Describes the ease with which water can move through pore spaces or fractures. It depends on the intrinsic permeability of the material and on the degree of saturation.
NOTE: Because of their high porosity and permeability, sand and gravel have higher hydraulic conductivity than clay or unfractured granite aquifers.
|
| approximateStorativityCoefficient |
QuantityValue
|
|
The ability of an aquifer to store water.
|