Namoi groundwater model

Abstract

The 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.

This data set comprises all the parameters, inputs for the regional groundwater model built for the Namoi subregion.

The spreadsheet in the 0_parameters folder lists the values of all parameters that were used for completing 3500 runs of the model.

The input files/scripts within the 1_inputs folder provides all inputs required to generate different packages of MODFLOW used for the Namoi model.

The raw MODFLOW outputs and post-processed dmax, tmax and flux changes outputs from 1 run of the model is provided in the 2_outputs folder.

The slides in "NAM_MF_flowchart.pptx provides an overview of the use of these inputs/outputs and parameters in completing the predictive groundwater model runs for the Namoi subregion.

Purpose

This data set provides a complete set of inputs and a -ready-to-run copy of the groundwater model that that was used for quantifying groundwater impacts for the Namoi subregion. The complete assessment was based on the running the model 3500 times using many combinations of the parameters of the model.

Dataset History

The groundwater model was built from scratch. Various existing data sets were used in generating the model inputs. These are listed in the lineage. The purpose of these source data sets are:

Namoi NSW Office of Water groundwater licence BA purpose - was used to define the groundwater pumping rates used in the model

Namoi hydraulic conductivity measurements - was used to identify a depth-based functional relationship that was used in generating multiple realizations of K fields used for multiple model layers.

Namoi bore locations, depth to water for June 2012 - was used for generating the MODFLOW wel package input.

Namoi dryland diffuse groundwater recharge - was used for defining the diffuse recharge input of the model

Namoi Leapfrog geological model - was used to define the hydrostratigraphy and model layer elevations corresponding to the Gunnedah Basin in the model

Historical Mining Footprints DTIRIS NAM 20150914 - was used to identify areas corresponding to mine pits in the model and define corresponding boundary conditions

Namoi groundwater model alluvium extent - used to define model layers corresponding to alluvium

Dataset Citation

Bioregional Assessment Programme (2017) Namoi groundwater model. Bioregional Assessment Derived Dataset. Viewed 12 March 2019, http://data.bioregionalassessments.gov.au/dataset/5ad7be74-e091-4f95-a2bf-6033ae7b933a.

Dataset Ancestors

• Derived From NSW Office of Water GW licence extract linked to spatial locations NIC v2 (28 February 2014)

• Derived From Namoi hydraulic conductivity measurements

• Derived From NSW Office of Water Groundwater Licence Extract NIC- Oct 2013

• Derived From Namoi NGIS Bore analysis for 2012

• Derived From Australian 0.05º gridded chloride deposition v2

• Derived From Surface Geology of Australia, 1:1 000 000 scale, 2012 edition

• Derived From Namoi Leapfrog geological model

• Derived From Historical Mining Footprints DTIRIS NAM 20150914

• Derived From Gippsland Project boundary

• Derived From Bioregional Assessment areas v04

• Derived From Natural Resource Management (NRM) Regions 2010

• Derived From Soil and Landscape Grid National Soil Attribute Maps - Clay 3 resolution - Release 1

• Derived From GEODATA TOPO 250K Series 3, File Geodatabase format (.gdb)

• Derived From Bioregional_Assessment_Programme_Catchment Scale Land Use of Australia - 2014

• Derived From GEODATA TOPO 250K Series 3

• Derived From NSW Catchment Management Authority Boundaries 20130917

• Derived From Geological Provinces - Full Extent

• Derived From Bioregional Assessment areas v03

• Derived From BOM, Australian Average Rainfall Data from 1961 to 1990

• Derived From GIS analysis of HYDMEAS - Hydstra Groundwater Measurement Update: NSW Office of Water - Nov2013

• Derived From Namoi groundwater model alluvium extent

• Derived From Hydstra Groundwater Measurement Update - NSW Office of Water, Nov2013

• Derived From Namoi dryland diffuse groundwater recharge

• Derived From Bioregional Assessment areas v01

• Derived From Bioregional Assessment areas v02

• Derived From Namoi bore locations, depth to water for June 2012

• Derived From NSW Office of Water Groundwater Entitlements Spatial Locations

• Derived From Victoria - Seamless Geology 2014

• Derived From Namoi NSW Office of Water groundwater licence BA purpose