Surveys (Aerial LiDAR)
to (or after) construction of a pipeline, a LiDAR survey
allows for the identification of off-line concerns such
as rivers, streams, ditches and buildings and provides an
accurate portrayal of ground conditions along the pipeline.
use LiDAR data?
When modelling overland flows, it is important to
obtain the best available, highest resolution data possible.
The standard for Digital Elevation Models (DEM's) in the
US is the National Elevation Dataset (NED) that provides
a consistent product for the entire U.S at a 30m (or in
some areas 10m) grid cell resolution.
Using a LiDAR survey, combined with the aerial photography
will provide a DEM with a grid spacing of 0.5-1m if required.
Using the NED data set, micro terrain features that may
channel the oil flow into a narrow width even on a steep
slope may be missed. This may even indicate that oil flow
would infringe upon a High Consequence Area (HCA) when in
fact it would be channelled away.
aerial photography combined with LiDAR data will provide
up to date land classifications, show areas of dense foliage
which will reduce oil mass, illustrate areas where oil will
pool and even indicate soil type.
an example of how LiDAR could be used to assist with Pipeline
Mapping Projects click here.