Attachment 7C - Flora and Fauna Survey Assessment_Noosa Landfill - Revision 3

                                                                                           Native Foresters



The methods used to assess water quality and differentiate between groundwater or surface
water flows are listed in Table 1. The results of these investigations are summarised in
Appendix H.
TABLE 1: Water quality assessment methods

 Parameter                   Assessment method(s)

                             Measured in the field using a B211 Horiba™ portable pH probe
 Water pH
                             with two-point calibration (calibrated daily, before use).

                             Assessed visually and/or through analysis of water samples
                             collected in the field. Water samples were analysed for tannin-
 Tannin-staining             staining using a spectrophotometer following the methodology
                             outlined in Cuthbert and del Giorgio (1992). Samples were filtered
                             through a 0.22 µM filter before being analysed.

                             Measured using a Horiba Aqua Twin salt meter (accurate to 0.1
 Salinity/conductivity
                             ppt NaCl).


                             Assessed visually in the field. Surface water assessed as ‘clear’,
 Turbidity/clarity           ‘slight-to-moderately turbid’ or ‘highly turbid’ depending on
                             visibility in areas of shallow water (5-10 cm deep).


2.2.5 Justification of survey timing and weather conditions
The field surveys were conducted in early-mid autumn, during hot, humid conditions
following a series of rain events. Weather conditions are summarised below in Table 2 for
each survey day. There was 124.8mm of rain in the month preceding the March survey,
and 146.2 mm of rain in the month leading up to the April survey. The survey conducted in
January 2021 was conducted in warm, wet conditions with temperature reaching 28
degrees Celsius and 93 mm of rain in the preceding five days.

TABLE 2: Weather conditions during field surveys

                                                             Rainfall           Relative   Relative
                     Temperature        Temperature                                        Humidity
                                                              (mm)              Humidity
  Date                Minimum            Maximum                                           Maximum
                                                            Preceding           Minimum
                        (oC)               (oC)                                              (%)
                                                              week                (%)
  12/03/19                23.7                34                13.6                  73        85
  28/03/19                19.6               22.5               42.6                  96       100
  26/04/19                19.5                23                56.2                  99        99
  12/01/2021               21                 28                93.0                  90        95

Data sourced from Australian Bureau of Meteorology - Daily Weather Observations,
Tewantin via http://www.bom.gov.au/climate/dwo/201903/html/IDCJDW4118.201903.shtml




Noosa Landfill & Resource Recovery Centre – Fauna and Flora Assessment – Revision 3                    15