Title

All Groundwater Entitlement Economic Value Density Difference from the Median 

Alternate title

GWE_ALL_EV_DENSITY_DIFFMED 

Supplemental Information

Related Documents: None 

Status

Completed  

Code

4283 

Maintenance and update frequency

As needed  

Title

DIGITAL: ESRI ASCII GRID, JEPG2000 3 

Topic category

• Inland waters
• Geoscientific information

Use limitation

General 

Classification

Unclassified  

Statement

Dataset Source: The following process was used to generate the dataset: (1) All licensed entitlement information for metered bores was obtained from Southern Rural Water (SRW), Goulburn Murray Water (GMW) and Grampians-Wimmera-Mallee Water (GWMW); (2) All licensed entitlement information for unmetered bores was collated from the Victorian Water Register; (3) The total licensed entitlement information (i.e. the sum of metered and unmetered bore license entitlement) per GMU was validated against that reported in the Victorian Water Accounts per GMU and Unincorporated Area. Where necessary, the entitlement volumes for bores in a given GMU (i.e. pro rata) were factored to equal that reported in the Accounts, where: Total Unmetered + Metered Licensed Entitlement (of bores that plot in the GMU) * Factor = Total Licensed Entitlement (as per the Water Accounts); (4) All Stock and Domestic bores were collated from the GMS and assigned an "entitlement volume" of 2 ML/bore/yr; (5) The bore point entitlement density was produced using the entitlement volume for each bore. The initial raster cell resolution was 100m and each cell was queried within a 1000m search radius, such that the cell recorded the volume of groundwater entitlement within 1000m of its location; (6) The 100m resolution density was aggregated to 1000m cell resolution to create the average of the density values of the 100m cells within the one square kilometre area. Using this dataset, the method used to generate the economic value involved: (1) Assigning every groundwater bore with an economic value per unit of groundwater entitlement (i.e. x $/ML) according to the end use type of the bore; (2) Multiplying the economic value per unit of groundwater entitlement by the recorded licensed entitlement volume for each bore.; (3) Subtracting the economic value for each raster grid from the state median such that the result is a positive value where the economic value is smaller than the state median and is a negative value where the economic value is greater than the state median. To create the final dataset, the following steps were undertaken: (1) The state median economic value of groundwater entitlement was calculated from the Gw_Entitlement_Eco_Value_Density dataset; (2) For each 1km cell, the economic value for each raster grid was subtracted from the state median. Dataset Originality: Derived 

Classification

Unclassified  

Attribute Quality

Comments

Attribute values are as accurate as the attributes of the source data used to derive the final dataset. 

Positional Accuracy

Comments

Highly variable. Borehole locations range from survey grade accuracy (+/- 0.10m horizontal) through to locations digitised from 1:100,000 scale mapping. 

Conceptual Consistency

Comments

Not known 

Missing Data

Comments

Victoria 

Excess Data