Stage 1 Irrigation Area_90 Beach Rd Noosa North Shore 12.06.2020 · MCU19/0117

EFFLUENT IRRIGATION MANAGEMENT PLAN - STAGE 1
NOOSA NORTH SHORE ECO-TOURISM PORTAL qc Cardno

 

 

 

 

 

 

4.8 Element 3: Effluent Irrigation Areas
RATIONALE: Effluent irrigation will result in the release of contaminants to soils
and may result in the release of contaminants to groundwater.

Management measures are required to ensure no significant impacts

occur to soils or groundwater within the irrigation areas and the

receiving environment.
OBJECTIVE: To manage irrigation areas to maintain soil and groundwater quality
and prevent soil erosion.
TASKS/ e A measurement of the soil moisture content of soils within the
ACTIONS: irrigation areas shall be undertaken prior to the application of
treated effluent. Irrigation shall be limited to that which is
sufficient to wet the soil to its undrained limit to prevent effluent
runoff or ponding.

e Soil structure shall be maintained to optimise infiltration and
permeability as indicated by monitoring.

e Application of effluent to the irrigation area shall cease whenever
there is rainfall on the irrigation area. Re-application shall be
restricted until soil moisture levels are below the undrained upper
limit for the soil.

e Should ponding or runoff of effluent occur within the irrigation
areas, effluent irrigation to that area shall cease immediately.

e The irrigation area shall be maintained in a well-grassed state
with a minimum of 95% vegetation cover at all times. Where
necessary, turf, pasture grass or trees shall be replaced to
maintain the vegetative cover.

e Corrective actions shall be undertaken if the vegetation within
the irrigation area is determined to be visibly degraded.

e Use of nitrogen fertiliser within irrigation areas shall be limited
and applied only as required. Nitrogen deficiency shall be
indicated by vegetation monitoring. Use of phosphorus based
fertiliser shall be restricted.

e Stormwater diversion infrastructure shall be installed around the
irrigation area. Erosion control measures shall be installed on
areas of exposed soils.

e A vegetated bund shall be installed at the southeastern boundary
of the irrigation area to detain pooled effluent during super-
irrigation.

PERFORMANCE | Degradation of soil quality within irrigation areas shall indicate non-
INDICATORS: compliance with this EIMP.

Degradation of water quality within receiving environments shall

indicate non-compliance with this EIMP.

Visible areas of soil erosion within irrigation areas shall indicate non-

compliance with this EIMP.

MONITORING: Soil conditions shall be monitored at nominated sampling locations
within each of the irrigation sites. Samples from representative sites
within the irrigation areas shall be collected from each of the topsoil

 

 

 

 

Petrac Leisure NNS-S Pty Ltd

Version 2 17 July 2006

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