Appendix 7: Guidance on information required to support modelling and analysis Note: The information required will vary depending on the type, scale and complexity of each proposal. This appendix is for guidance only. If required, further advice on the information needed to support modelling should be sought from the SDLATWG or the MDBA. Phase 2 Business Case Information to support modelling and analysis. This Guidance on the standard of information required Guidelines reference information will assist the MDBA or proponents represent a proposal in its hydrologic model(s) Environmental works and measures at point locations: these infrastructure-based measures attempt to directly achieve the Basin Plan’s environmental outcomes at specific sites along the river using less environmental water than would otherwise be required. Hydrology of the area and area of inundation (pre- and post-implementation) 4.5.1 Current Quantitative description of the hydrology and hydraulic Adequate details to make robust assessment of the water hydrology and relationships at the site. savings possible under hydrological regime of 1895 to 2009 proposed changes to period. The area of the works site that is inundated under various the hydrology river flows conditions: The quality and quantity of data available and any issues 4.5.2 Environmental currently; and that may affect any analysis or assessments now or in the water requirements with the proposed works. future – needs to be identified and documented. 4.9 Complementary A comparison between the volume of water that returns to Modelling needs to be fit-for-purpose. actions and the river under current conditions and under the proposed Where there is inadequate data, the uncertainty of the interdependencies works. estimates need to be quantified. Where a proposal changes flows, a comparison of the flows Information should be based on best available science, and under current conditions and the flows that result from the include qualifiers – such as assumptions used which may proposed changes. affect modelling outcomes. Digital elevation model, cross sections and local data, if Spatial representation at a scale which is adequate to available. enable the assessment of the likely SDL reduction using Vegetation layers, satellite images and other information to ecological elements method. improve the model’s calibration. Rainfall, evaporation and seepage loss rates for the site. Information on the antecedent conditions that may influence hydrology and assessment of impacts. Spatial representation of area inundated and vegetation types impacted for different levels of inundation at the site.
Appendix 7: Guidance on information required to support modelling and analysis Note: The information required will vary depending on the type, scale and complexity of each proposal. This appendix is for guidance only. If required, further advice on the information needed to support modelling should be sought from the SDLATWG or the MDBA. Phase 2 Business Case Guidelines reference Information to support modelling and analysis. This information will assist the MDBA or proponents represent a proposal in its hydrologic model(s) Guidance on the standard of information required Environmental works and measures at point locations: these infrastructure-based measures attempt to directly achieve the Basin Plan’s environmental outcomes at specific sites along the river using less environmental water than would otherwise be required. Hydrology of the area and area of inundation (pre- and post-implementation) 4.5.1 Current hydrology and proposed changes to the hydrology 4.5.2 Environmental water requirements 4.9 Complementary actions and interdependencies Quantitative description of the hydrology and hydraulic relationships at the site. The area of the works site that is inundated under various river flows conditions: currently; and with the proposed works. A comparison between the volume of water that returns to the river under current conditions and under the proposed works. Where a proposal changes flows, a comparison of the flows under current conditions and the flows that result from the proposed changes. Digital elevation model, cross sections and local data, if available. Vegetation layers, satellite images and other information to improve the model’s calibration. Rainfall, evaporation and seepage loss rates for the site. Information on the antecedent conditions that may influence hydrology and assessment of impacts. Spatial representation of area inundated and vegetation types impacted for different levels of inundation at the site. Adequate details to make robust assessment of the water savings possible under hydrological regime of 1895 to 2009 period. The quality and quantity of data available and any issues that may affect any analysis or assessments now or in the future – needs to be identified and documented. Modelling needs to be fit-for-purpose. Where there is inadequate data, the uncertainty of the estimates need to be quantified. Information should be based on best available science, and include qualifiers – such as assumptions used which may affect modelling outcomes. Spatial representation at a scale which is adequate to enable the assessment of the likely SDL reduction using ecological elements method.
Phase-2-Assessment-guidelines_0.docx