Average annual potential ET minus actual ET, for dry years (1997 - 2005) (mm/yr)

dataset: ENSYM_ET100_DRY
Calculated using the Ensym model. The potential evapotranspiration minus actual un-saturated evapotranspiration calculation can be used to set an upper limit to groundwater evaporation rates. Ensym estimates daily spatial evapotranspiration by solving for physical processes using analytical solutions and empirical equations. Evaporation of water from the soil surface is calculated using a Ritchie's two-stage evaporation algorithim. After infiltration , drying occurs at the potential rate up to a specified limit (stage I) and thereafter at a rate reflecting diffusion processes that are assumed proportional to the square root of time (Stage II). In general transpiration is calculated as a function of pan evaporation, leaf area index, soil moisture content, plant density and temperature however the specifics of the calculations vary with landuse and the particular plant growth model utilised. For further information: https://ensym.dse.vic.gov.au/home/aboutensym Beverly, C., 2007. Technical Manual - Models of the Catchment Analysis Tool. Victoria. Department of Sustainability and Environment.
 
Citation proposal Citation proposal
(2013)

Average annual potential ET minus actual ET, for dry years (1997 - 2005) (mm/yr)

Department of Environment, Land, Water & Planning
 

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Identifiers and Keywords

ANZLIC Id
ANZVI0803004628 
Jurisdiction
Victoria 
Topic category
  • Inland waters
  • Farming
  • Climatology, meteorology, atmosphere
 

Resource Constraints

Use limitation
Available under license. All use must be approved by the DSE ecoMarkets data custodian. 
Classification
Unclassified  
Creative Commons Attribution 4.0 (CC-BY)
 

Other Dataset Details

Date ( Revision )
2013-09-09
Status
Completed  
Purpose
Modelled evapotranspiration data can be used for: - water balance estimates - groundwater modelling inputs - landuse change impact modelling 
Format
DIGITAL - ArcView ascii grid 3 
Supplemental Information
Related Documents: None 
Maintenance and update frequency
As needed  
 

Spatial

Spatial representation type
Grid  
Description
General - Victoria 
Reference system identifier
4283

N
S
E
W


 

Temporal

Begin date
2011-10-01 
End date
2011-11-28 
 

Resolution

Horizontal Accuracy
100m  
 

Quality

Missing Data
State of Victoria 
Attribute Quality
Estimates of evapotranspiration vary in accuracy based on input datasets. Variability in temperature recordings and plant growth modelling add the highest uncertainty in ET estimates. 
Positional Accuracy
Precision: 10 - 100m Determination: Based on the scale of input datasets 
 

Lineage

Statement
Dataset Source: Evapotranspiration estimates are sourced from the DSE Ensym model. Dataset Originality: Primary 
 

About the Metadata Record

Metadata identifier
4230b24d-c24b-58c5-ae47-3cbca4f4fb62

Contact  

No information provided.
Resource Type
Dataset  
Date info ( Revision )
2013-09-09
Standard Name
ISO 19115-3:2018 
Profile Name
DELWP Profile 
Profile Version
Version 1 
Profile Date
2019-05-24  
 

Metadata Constraints

Classification
Unclassified  
 
 

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