Assessment of Near Future Change in Hydrology of Wetlands in HGL of the ACT 2017 (2nd Ed)

This dataset supersedes all earlier versions of 'Assessment of Near Future Change in Hydrology of Wetlands in HGL of the ACT '. It incorporates HGL boundary and management area edits based on updated soil landscape mapping for the ACT.

The focus of this dataset is climate change impacts on hydrological parameters of wetlands in the Australian Capital Territory. It contains digital spatial data developed to assist in land management decision making in the ACT. The dataset contains an assessment of the change brought about by climate change on the groundwater, surface water and precipitation components of wetland water balances. Three selected regional climate projection ensembles from the NARCliM (NSW/ACT Regional Climate Modelling) project were used in the assessment – multimodel mean, CCCMA3.1-R2 and ECHAM5-R3. Only near-future (1990-2009 to 2020-2039) projections were considered. Each variable was considered using annual and seasonal time periods. Field names in the dataset follow the following format:


C – Consensus (NARCliM Multimodel Consensus Scenario)
W – Wetter (NARCliM CCCMA3.1-R2 Wetter Scenario)
D – Drier (NARCliM ECHAM5-R3 Drier Scenario)

P – Precipitation
S – Surface water
G – Groundwater

A – Annual
S – Seasonality

AC – Absolute change (mm)
PC – Percent change (%)
MC – Magnitude of change
C – Current seasonality
NF – Near future seasonality

Hydrogeological landscape (HGL) unit boundaries developed as part of the broader ACT Hydrogeological Landscapes (HGL) Framework project where used to constrain the outputs for this hydrological assessment in the ACT. In all, there are 25 HGL defined. A weighted mean was used to calculate values for each HGL unit based on the proportions of corresponding 10km gridded data from the NARCliM data set.

The outcomes suggest that the consensus scenario is the better outcome for wetlands, and despite an increase in annual volumes, the level of seasonal change in found in both the wetter and dryer scenarios poses a risk to wetlands. It is also important to note that the levels of annual water source increase predicted in the wetter scenario may also have negative impacts on wetlands.

Spatial resolution of this product is 1:50 000.

Data and Resources

Metadata Summary What is metadata?

Field Value
Data Type Vector
Alternative Title ACT_HGL_NFHMOC_2017
Metadata Date 23/05/2017
Date Created 19/05/2017
Date Revised 11/05/2020
Date Published 22/05/2017
Edition Second
Purpose This data package was generated for the ACT Environment and Planning Directorate as a component of the ACT Hydrogeological Landscapes (HGL) Framework project. The focus of this project was to assess impacts of climate change on wetlands and on land degradation issues related to salinity and erosion in the ACT.
License Creative Commons Attribution 4.0
Update Frequency Data is updated irregulary
Keywords CLIMATE-AND-WEATHER-Climate-change,WATER-Wetlands,HAZARDS,LAND-Use

Dataset extent

Equivalent Scale 50000
Geospatial Topic Geoscientific Information
Language English
NSW Place Name Australian Capital Territory
Temporal Coverage From 01/04/2017 - 22/05/2017
Datum GDA94 / MGAZone 55
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Attribution Department of Planning, Industry and Environment asserts the right to be attributed as author of the original material in the following manner: "© State Government of NSW and Department of Planning, Industry and Environment 2017"