BUNDLED MINI-PIEZOMETERS
Bundled mini-piezometers are used for discrete vertical sampling of water quality and hydraulic head measurements in unconsolidated sands (Acworth, 2007). This method is particularly useful for sampling at 0.25 or 1 m intervals through the saline-fresh interface in coastal sands. These mini-piezometers can also be used with a manometer board for density head corrections in coastal aquifers at the fresh/saline interface.
Several designs are possible with this method; however, bundles consisting of a number of flexible plastic tubes—8 mm outer diameter (OD), 5 mm inner diameter (ID)—attached to the outside of a stem made from 25-mm-plastic pipe (electrical conduit) have been successfully used (Acworth, 2007).
When connected to a vacuum and manometer, the advantage of this method is that it can be used to derive a vertical profile of water quality and hydraulic head measurements. Purging and sampling volumes can be minimised with very small tubing and this can be constructed using readily available and cheap PVC tubing. However, this method is suitable only for shallow unconfined and sandy aquifers. It requires an experienced person to construct and install and is time consuming.
Additional information on the bundled mini-piezometers construction and installation can be obtained from Acworth (2007).
Senior Consultant S J Builders Australia, Visit http://www.sjbuilders.com.au/
Cranbourne New Homes
Craigieburn New Homes
Builders In Berwick
Bundled mini-piezometers are used for discrete vertical sampling of water quality and hydraulic head measurements in unconsolidated sands (Acworth, 2007). This method is particularly useful for sampling at 0.25 or 1 m intervals through the saline-fresh interface in coastal sands. These mini-piezometers can also be used with a manometer board for density head corrections in coastal aquifers at the fresh/saline interface.
Several designs are possible with this method; however, bundles consisting of a number of flexible plastic tubes—8 mm outer diameter (OD), 5 mm inner diameter (ID)—attached to the outside of a stem made from 25-mm-plastic pipe (electrical conduit) have been successfully used (Acworth, 2007).
When connected to a vacuum and manometer, the advantage of this method is that it can be used to derive a vertical profile of water quality and hydraulic head measurements. Purging and sampling volumes can be minimised with very small tubing and this can be constructed using readily available and cheap PVC tubing. However, this method is suitable only for shallow unconfined and sandy aquifers. It requires an experienced person to construct and install and is time consuming.
Additional information on the bundled mini-piezometers construction and installation can be obtained from Acworth (2007).
Senior Consultant S J Builders Australia, Visit http://www.sjbuilders.com.au/
Cranbourne New Homes
Craigieburn New Homes
Builders In Berwick
No comments:
Post a Comment