used to represent well Apparently no accounting of groundwater–surface water field (rather than interaction pumping/flow rates) Queensland MODFLOW Regional groundwater Modelling of historical CSG operation in Queensland Uncertainty analysis Queensland model (300,000 km2 (Surat and Bowen Basins) was undertaken was carried out using Water Resources model domain) multiple simulations Commission Modelling included simulation of multiple CSG incorporating changes to (2012) operations and was used to develop and assessment of the model. The results cumulative impacts and aggregate groundwater of this analysis were extraction associated with CSG extraction used to assess uncertainty in the predicted impacts Namoi MODFLOW Regional groundwater Separate of surface water system Sensitivity analyses Schlumberger Catchment model (30,000 km2 model carried out to assess Water Multi-layered model to address future CSG and coal domain) uncertainty associated Services mine development. Modelling of existing, planned and with rock permeability (2012) CSG well fields modelled possible development and recharge values a specified extraction Cumulative effects assessed through multiple model adopted rate over each well field analyses by comparing the results for a range of modelled alternate development scenarios with a base case of Cumulative impacts limited development (including existing and Groundwater impacts on surface water obtained using
used to represent well field (rather than pumping/flow rates) Apparently no accounting of groundwater–surface water interaction Queensland Resources MODFLOW Regional groundwater model (300,000 km2 model domain) Modelling of historical CSG operation in Queensland (Surat and Bowen Basins) was undertaken Modelling included simulation of multiple CSG operations and was used to develop and assessment of cumulative impacts and aggregate groundwater extraction associated with CSG extraction Uncertainty analysis was carried out using multiple simulations incorporating changes to the model. The results of this analysis were used to assess uncertainty in the predicted impacts Queensland Water Commission (2012) Namoi Catchment MODFLOW Regional groundwater model (30,000 km2 model domain) CSG well fields modelled a specified extraction rate over each well field modelled Cumulative impacts (including existing and Separate of surface water system Multi-layered model to address future CSG and coal mine development. Modelling of existing, planned and possible development Cumulative effects assessed through multiple model analyses by comparing the results for a range of alternate development scenarios with a base case of limited development Groundwater impacts on surface water obtained using Sensitivity analyses carried out to assess uncertainty associated with rock permeability and recharge values adopted Schlumberger Water Services (2012)
csg-modelling-groundwater-impacts.docx