Monitoring

 

Due to different plume diffusion in varying strata, monitoring points have to be considered for special conditions. This section illustrates how pollutants enter groundwater and streambeds through different strata (sandstone, limestone, chalk, poorly permeable and very poorly permeable), how this influences monitoring techniques and aslo shows a comparative illustration in "Monitoring different aquifers".

"Monitoring at diferent depths" shows how piezometers at varying depths (combined or in separate monitoring points) increase the chance of the detection of pollutants.

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Monitoring - poorly permeable aquifer

In a poorly permeable aquifer, it is difficult to ensure that monitoring points will detect a pollution plume, although a surface monitoring point may be better

Monitoring - basic landscape More info... Monitoring - poorly permeable strata More info... Monitoring - poorly permeable strata, showing second cutout More info... Monitoring - very poorly permeable strata, second cutout More info... Monitoring - poorly permeable strata, catchment More info...
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Monitoring - sandstone

The increased width of plume means that observation boreholes are more likely to detect a pollution plume

Monitoring - basic landscape More info... Monitoring - sandstone More info... Monitoring - sandstone, second cutout More info...
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Monitoring - limestone

In limestone, the plume width and the way it moves through the aquifer makes it very difficult to ensure that the
pollution plume will be detected

Monitoring - basic landscape More info... Monitoring - limestone More info... Monitoring - limestone, second cutout More info...
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Monitoring - chalk

In chalk, the plume width and the way it moves through the aquifer makes it very difficult to ensure that the pollution plume will be detected

Monitoring - basic landscape More info... Monitoring - chalk More info... Monitoring - chalk, second cutout More info...
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Monitoring in different types of aquifer

Comparing the size and shape of pollution plumes in different types of aquifer

Monitoring - basic landscape More info... Monitoring - poorly permeable strata, showing second cutout More info... Monitoring - poorly permeable strata More info... Monitoring - poorly permeable strata, showing second cutout More info... Monitoring - very poorly permeable strata, second cutout More info... Monitoring - poorly permeable strata, catchment More info...
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Monitoring in different types of aquifer

Comparing the size and shape of pollution plumes in different types of aquifer

Monitoring - basic landscape More info... Monitoring - poorly permeable strata, showing second cutout More info... Monitoring - very poorly permeable strata, second cutout More info... Monitoring - sandstone, second cutout More info... Monitoring - limestone, second cutout More info... Monitoring - chalk, second cutout More info...
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Monitoring at different depths

Piezometers at different depths increase monitoring success

Monitoring - piezometers at different depths More info...

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