MBC Groundwater model uncertainty analysis

## **Abstract** \n\nThis dataset was derived by the Bioregional Assessment Programme from multiple source datasets. The source datasets are identified in the Lineage field in this metadata statement. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement.\n\n\n\nThis data set comprises a series of outputs produced from the groundwater model runs. This include drawdown grids corresponding to 95 percentile drawdown obtained as a difference between the baseline and crdp runs. The follwoing steps were involved in producing these outputs.\n\n1) 200 runs each of the baseline and CRDP versions of the model were undertaken\n\n\n\n 2) The maximum drawdown (dmax) and time of maximum (Tmax) drawdown were computed for each of the 200 runs for each m odel layer.\n\n\n\n3) The 95th percentile of the Dmax and Tmax were computed by removing the highest 10 (5% of 200) Dmax and Tmax values using the C code in the folder 95_percentile_drawodwn\n\n\n\n4) The probablity of exceedence of 5 and 0.2 m drawdown were computed as a percentage of the 200 runs. The probabilities were gridded and plotted to the MBC maps.\n\n## **Purpose** \n\nThese formed the basis of the figures in the MBC 2.6.2 product.\n\n## **Dataset History** \n\nThis a derived data set. All the inputs for this data set were obtained from the groundwater model data set. The outputs have been derived from Monte Carlo runs to produce upper and lower statistical boundaries for uncertainty analysis. Plots were developed for inclusion in the MBC 2.6.2 product using outputs from Python scripts.\n\n\n\nThe grids in this dataset have been extracted to correspond to their respective geological model boundary.\n\n## **Dataset Citation** \n\nBioregional Assessment Programme (2016) MBC Groundwater model uncertainty analysis. Bioregional Assessment Derived Dataset. Viewed 25 October 2017, http://data.bioregionalassessments.gov.au/dataset/484c800e-55e0-465a-9243-c440311c51f3.\n\n## **Dataset Ancestors** \n\n* **Derived From** [MBC Groundwater model](https://data.gov.au/data/dataset/6fe25546-a6ca-44fc-a101-51b1758e2890)\n\n* **Derived From** [MBC Groundwater model mine footprints](https://data.gov.au/data/dataset/6c87cc94-7186-4fdd-a58c-6d52dc5856b1)\n\n* **Derived From** [MBC Groundwater model uncertainty plots](https://data.gov.au/data/dataset/44f36874-d053-4cfb-9ccd-d5407e3b1b18)\n\n* **Derived From** [MBC Groundwater model layer boundaries](https://data.gov.au/data/dataset/32b986d0-c3d0-4a01-a5a9-6fffde638e11)\n\n