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- Trangie NSW
Irrigation Channel Assessment 
In addition to the use of electromagnetic
surveying for assessment of large areas, the technology
can also be applied in line surveys such as for irrigation
channels. These surveys generate data along the survey line
to identify channel sections with potentially high drainage
characteristics.
The survey process can involve surveying while the channel
contains water using a customised, powered survey pontoon
or using a 4-wheel bike after the water has been removed.
Customised channel survey unit
Sample survey data with potentially high
drainage areas shown as red. Boxes identify the areas shown
in the following 2 images.
Surveying is undertaken by collecting
data from a survey pass in each direction with data collected
at a one second interval.
 |
Satellite
imagery (displayed as false colour with active plant
growth shown as red). The
identified area shows a section of low ECa (potentially
high drainage) and its location relative to a prior
stream as identified by the red area either side of
the channel. In this situation it is suggested that
the growth in the stream is sourcing water leaked
from the channel
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