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HUN Comparison of model variability and interannual variability

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.

These are the data summarising the modelled Hydrological Response Variable (HRV) variability versus climate interannual variability which has been used as an indicator of risk. For example, to understand the significance of the modelled increases in low-flow days, it is useful to look at them in the context of the interannual variability in low-flow days due to climate. In other words, are the modelled increases due to additional coal resource development within the natural range of variability of the longer-term flow regime, or are they potentially moving the system outside the range of hydrological variability it experiences under the current climate? The maximum increase in the number of low-flow days due to additional coal resource development relative to the interannual variability in low-flow days under the baseline has been adopted to put some context around the modelled changes. If the maximum change is small relative to the interannual variability due to climate (e.g. an increase of 3 days relative to a baseline range of 20 to 50 days), then the risk of impacts from the changes in low-flow days is likely to be low. If the maximum change is comparable to or greater than the interannual variability due to climate (e.g. an increase of 200 days relative to a baseline range of 20 to 50 days), then there is a greater risk of impact on the landscape classes and assets that rely on this water source. Here changes comparable to or greater than interannual variability are interpreted as presenting a risk. However, the change due to the additional coal resource development is additive, so even a 'less than interannual variability' change is not free from risk. Results of the interannual variability comparison should be viewed as indicators of risk.

Dataset History

This dataset is generated using 1000 HRV simulations together with climate inputs. Ratios between the variability in HRVs, and the variability attributable interannual variability due to climate, were calculated for the HRVs. Results of the interannual variability comparison should be viewed as indicators of risk.

Dataset Citation

Bioregional Assessment Programme (2017) HUN Comparison of model variability and interannual variability. Bioregional Assessment Derived Dataset. Viewed 13 March 2019, http://data.bioregionalassessments.gov.au/dataset/1c0a19f9-98c2-4d92-956d-dd764aaa10f9.

Dataset Ancestors

Data and Resources

This dataset has no data

Additional Info

Field Value
Title HUN Comparison of model variability and interannual variability
Type Dataset
Language eng
Licence Restricted access. This dataset is not available for public distribution.
Data Status active
Update Frequency never
Landing Page https://data.gov.au/data/dataset/d2b16fec-fdf9-443e-a535-e69ae2703b04
Date Published 2019-03-13
Date Updated 2023-08-09
Contact Point
Bioregional Assessment Program
bioregionalassessments@environment.gov.au
Temporal Coverage 2019-03-13 20:47:57
Geospatial Coverage POLYGON ((0 0, 0 0, 0 0, 0 0))
Jurisdiction NONE
Data Portal data.gov.au
Publisher/Agency Bioregional Assessment Program