Capture zones for community supply wells in the Greater
Wellington Region. Existing calibrated groundwater flow models were used to
define the capture zones for relevant wells in the
Kāpiti Coast, Hutt Valley
and Ruamāhanga River Valley.
A capture zone is defined as the total source area that contributes groundwater
to a well. Particle tracking methods were used to trace the outline of the
capture zones around each well using a combination of forwards tracking
particles on the water table and backwards particle tracking around each well
screen. A number of sensitivity simulations were run and the maximum capture
zone area was obtained by aggregating the path lines from the model runs. More
information can be found in the report:
Toews, M.W., Donath, F. (2015), Capture Zone Delineation of
Community Supply Wells and State of the Environment Monitoring Wells in the
Greater Wellington Region. Report to Greater Wellington Regional Council by GNS
Science, Report 2015/06, 69p.