Receptor impact modelling attempts to capture the direct, indirect and of coal seam gas (CSG) and coal mining development on the within the defined . The aim of receptor impact modelling is to convert the potentially abstract information about hydrological changes into quantities (risk assessment endpoints) that stakeholders care about and can more readily understand and interpret. In particular, the model outcomes are anticipated to relate more closely to stakeholders’ values and beliefs and therefore support community discussion and decision making about acceptable levels of development.
The that describe how coal resource development can potentially lead to changes in hydrology are identified in companion product 2.3 for the Namoi subregion (). The represent the subsequent pathways, which relate changes in to potential impacts on water-dependent landscape classes and within the .
- baseline coal resource development (baseline), a future that includes all coal mines and CSG fields that are commercially producing as of December 2012
- coal resource development pathway (CRDP), a future that includes all coal mines and CSG fields that are in the as well as those that are expected to begin commercial production after December 2012.
The difference in results between and baseline is the change that is primarily reported in a BA. This change is due to the – all coal mines and CSG fields, including expansions of baseline operations that are expected to begin commercial production after December 2012. In receptor impact modelling, however, the critical change is the difference between average groundwater and conditions in the reference period (1983 to 2012), and their predicted average conditions under the baseline and the CRDP in the short term (2013 to 2042) and longer term (2073 to 2102).
This product presents the receptor impact modelling for the . The modelling is described in detail in the companion submethodology M08 (as listed in Table 1) for receptor impact modelling (). Section 188.8.131.52 of this document describes how this methodology is applied to the Namoi subregion.
The following terms are used throughout the receptor impact model products to describe the modelling process and its results:
- hydrological response variable – a hydrological characteristic of the system (for example, or the volume) that potentially changes due to coal resource development (see companion submethodology M07 (as listed in Table 1) on groundwater modelling () and companion submethodology M06 (as listed in Table 1) on surface water modelling ())
- receptor impact variable – a characteristic of the system that, according to the conceptual modelling, potentially changes due to changes in hydrological response variables (for example, condition of the breeding habitat for a given species, or biomass of river red gums)
- receptor impact model – a receptor impact model predicts a relationship between a (for example, annual mean percent canopy cover of woody vegetation), and one or more hydrological response variables (for example, dmax, maximum groundwater drawdown due to additional coal resource development).
Product Finalisation date
- 2.7.1 Methods
- 2.7.2 Prioritising landscape classes for receptor impact modelling
- 2.7.3 'Floodplain or lowland riverine' landscape group
- 2.7.4 'Non-floodplain or upland riverine' landscape group
- 2.7.5 Pilliga riverine landscape classes
- 2.7.6 'Rainforest' landscape group
- 2.7.7 'Springs' landscape group
- 2.7.8 Limitations and gaps
- Contributors to the Technical Programme
- About this technical product