RFI - Appendix 6 - Ground Water Response · MCU19/0117

Groundwater Dependant Ecology Preliminary Impact Assessment v1                       NCES REF: J000538
90 Beach Road, Noosa North Shore




                              Plate 2 – Site Topography (Source: Queensland Globe)

3.2 Soils and Geology
The soils underlying the wave pool location comprise a silty sand to 1m+ over a clayey sand to
1.6m – 1.7m over a high plasticity sandy clay to at least 2m (Global Soil Testing 2019 – refer
Appendix 2 BH6 and BH2). Consequently, direct soil infiltration of discharge waters could be
expected to reach a minimum of approximately 1.6m depth before being redirected laterally as
through flow over the semi permeable sandy clay layer toward the GDE to the east.

The soils underlying the GDE to the east comprise Q1 quaternary seasonally waterlogged sand
plains and alluvial deposits (ASRIS 2020).

3.3 Groundwater
The depth to groundwater beneath the proposed wave pool location is currently undefined. Soil
investigations by Global Testing in 2019 failed to intercept groundwater or a perched water table
to 2m depth about the wave pool location. The depth to groundwater beneath the GDE is
anticipated to be <1m.

The Great Sandy National Park groundwater table receives substantial groundwater input from a
number of sources including large sand masses and undulating landscapes. The porous sand
substrate beneath the site is anticipated to enable high amounts of water infiltration and recharge
of groundwater. The groundwater is expected to provide an important contribution to local springs,
creeks, wetlands and terrestrial vegetation year-round.

3.4 Groundwater Dependent Ecosystems
A desktop assessment of the ecology values of the adjacent wetland ecosystem has been
undertaken to inform the values which may be impacted by the proposal.
3.4.1    Vegetation Management Supporting Map
DNRME’s Regulated Vegetation Management Supporting Map identifies Category C regulated
vegetation dominates the site with a linear edge of Category B regulated vegetation present along
the centre of the eastern boundary as well as the southern and south western site extents (refer to




                                                            5                                     2020