Galilee Harwood Evapotranspiration v01

## **Abstract** 

This dataset was derived by the Bioregional Assessment Programme. The parent dataset is 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 dataset contains a reclassification of the source datatset Harwood Evapotranspiration EAA (Actual Evaporation topo-corrected) v01 (GUID: baf0a32a-24e1-4882-b3f6-fb690476f0f0).



Abstract from source dataset:



Climate change presents a challenge for the management of water resources and for the management of systems dependent on those water resources. In particular, the effect of water flow across and below the ground surface is rarely adequately represented. Our motive was to capture this effect for water limited Australia, to assist with the identification of climate change refugia. We present a new algorithm for the  rescaling of actual evapotranspiration (ETa) under future climate. The algorithm uses standard topographic adjustment of radiation and temperature to spatially rescale remotely sensed ETa, estimated for current conditions in accordance with the Budyko framework.



Calculations were limited by those inputs which could reasonably be derived from Global Circulation Model (GCM) outputs with minimal assumptions. Priestley-Taylor potential evapotranspiration was calculated based on topographically adjusted temperature and radiation, and annual total ETa was subsequently calculated as the sum of monthly ETa using the Budkyo framework, incorporating a best estimate of plant available water holding capacity as a tipping bucket. The discrepancy between modelled and remotely derived ETa under present conditions was used to generate a cell by cell correction along the Budyko curve which was then applied to GCM driven future ETa. The approach  assumes a consistent large scale spatial pattern of surface and ground water movement. 



Projecting remotely derived estimates of actual evapotranspiration (ETa) under climate change in Australia. CSIRO Climate Adaptation Flagship Thomas Harwood, Randall Donohue, Tim McVicar, Kristen J Williams, Justin Perry, Jeremy Vanderwal, Cassandra James, Simon Ferrier (http://apo.org.au/files/Resource/Williams-Climate-change-refugia-for-terrestrial-biodiversity_0.pdf)

## **Purpose** 

these data were used to help determine water dependence of assets

## **Dataset History** 

These data were created by reclassifying the Harwood Evapotranspiration EAA (Actual Evaporation topo-corrected) v01 dataset (GUID: baf0a32a-24e1-4882-b3f6-fb690476f0f0) grid into the following class breaks:

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## **Dataset Citation** 

Bioregional Assessment Programme (2015) Galilee Harwood Evapotranspiration v01. Bioregional Assessment Derived Dataset. Viewed 05 July 2017, http://data.bioregionalassessments.gov.au/dataset/11726ec2-89f4-4627-806f-6e9c119b92cb.

## **Dataset Ancestors** 

* **Derived From** [Harwood Evapotranspiration EAA (Actual Evaporation topo-corrected) v01](https://data.gov.au/data/dataset/baf0a32a-24e1-4882-b3f6-fb690476f0f0)



Tags: Arckaringa subregion, Australia, CLIMATE-AND-WEATHER, Cooper subregion, Galilee subregion, Pedirka subregion, climatologyMeteorologyAtmosphere
Organization: Bioregional Assessment Program