Landfill: Difference between revisions

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Landfill sites have usually been constructed in disused quarries, or parts of quarries. However, the phrase is also used to describe sites built where there had previously been no excavation. Such sites are also known as “land-raise” sites, but in the context of this website, no distinction has been made. To all practical intents and purposes, there is no significant difference between landfill and land-raise.

=== Hydrogeology ===

One definition of aquifer is as follows, quoted from Freeze and Cherry (1979): “An aquifer is best described as a saturated permeable geologic unit that can transmit significant quantities of wate under ordinary hydraulic gradients”. This definition captures the essence of the word very well.

One definition of aquifer is as follows, quoted from Freeze and Cherry (1979): “An aquifer is best described as a saturated permeable geologic unit that can transmit significant quantities of wate under ordinary hydraulic gradients”. This definition captures the essence of the word very well.<br>

In the England and Wales, the EA categorise aquifers to be consistent with the Water Framework Directive. The categories are Principal Aquifer, Secondary Aquifer and Unproductive Strata. Previously the phrases major aquifer and minor aquifer were utilised. Similar arrangements exist in Scotland and are supervised by SEPA.

In the England and Wales, the EA categorise aquifers to be consistent with the Water Framework Directive. The categories are Principal Aquifer, Secondary Aquifer and Unproductive Strata. Previously the phrases major aquifer and minor aquifer were utilised. Similar arrangements exist in Scotland and are supervised by SEPA.<br>

The relevance of the hydrogeological setting within which a landfill is located arises from the need to assess the technical precautions required for a landfill to be authorised such that unacceptable environmental impacts are prevented. This assessment is undertaken via a Hydrogeological Risk Assessment (HRA); this is submitted as supporting document to an Environmental Permit application. Again, similar arrangements are in place in Scotland.

@@ Line 18: / Line 18: @@
 Landfill sites have usually been constructed in disused quarries, or parts of quarries. However, the phrase is also used to describe sites built where there had previously been no excavation. Such sites are also known as “land-raise” sites, but in the context of this website, no distinction has been made. To all practical intents and purposes, there is no significant difference between landfill and land-raise.
 === Hydrogeology ===
-One definition of aquifer is as follows, quoted from Freeze and Cherry (1979): “An aquifer is best described as a saturated permeable geologic unit that can transmit significant quantities of wate under ordinary hydraulic gradients”. This definition captures the essence of the word very well.
+One definition of aquifer is as follows, quoted from Freeze and Cherry (1979): “An aquifer is best described as a saturated permeable geologic unit that can transmit significant quantities of wate under ordinary hydraulic gradients”. This definition captures the essence of the word very well.<br>
-In the England and Wales, the EA categorise aquifers to be consistent with the Water Framework Directive. The categories are Principal Aquifer, Secondary Aquifer and Unproductive Strata. Previously the phrases major aquifer and minor aquifer were utilised. Similar arrangements exist in Scotland and are supervised by SEPA.
+In the England and Wales, the EA categorise aquifers to be consistent with the Water Framework Directive. The categories are Principal Aquifer, Secondary Aquifer and Unproductive Strata. Previously the phrases major aquifer and minor aquifer were utilised. Similar arrangements exist in Scotland and are supervised by SEPA.<br>
 The relevance of the hydrogeological setting within which a landfill is located arises from the need to assess the technical precautions required for a landfill to be authorised such that unacceptable environmental impacts are prevented. This assessment is undertaken via a Hydrogeological Risk Assessment (HRA); this is submitted as supporting document to an Environmental Permit application. Again, similar arrangements are in place in Scotland.