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Dry-season wetlands derived from Landsat archive for NAWRA

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About this Collection

Dry-season wetlands derived from Landsat archive for NAWRA


Dry-season wetlands data show the average value derived from each season’s maximum number of consecutive days where surface water has been identified during the dry seasons from 1988 to 2016 from Landsat imagery. This dataset was created for the CSIRO Northern Australia Water Resource Assessment (NAWRA) project. These data are maps of dry-sea... more


Environmental Management Environmental Monitoring


https://doi.org/10.25919/5c0a052c3e391


1988


2016


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NAWRA Fitzroy catchment (Western Australia) Darwin catchments (Northern Territory) Mitchell catchment (Queensland) Regional development Landsat Wetlands


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Attribution

Landsat_DryseasonWetlands_metadata_details_for_DAP.docx


The following steps were performed to derive the dry-season wetland maps: • The Landsat maps of surface water (described in Sims et al., 2016) for each dry season (defined as May to October) were used to estimate the maximum number of consecutive days that each pixel is inundated. For pixels obscured by cloud cover, if they were mapped as water before and after a period of cloud cover then the pixel was inferred to be inundated for the full duration. If the pixel was dry at the end of the cloudy period then the pixel was assumed to be dry since the last flooded image. • The average value of maximum consecutive days of inundation from each dry season was then calculated. • To help reduce commission errors, especially where water is mistakenly mapped due to dark shadows from steep topography, the null layer from Geoscience Australia’s Water Observations from Space (WOfS) dataset was used to mask out these areas. In the Fitzroy region, where areas were still incorrectly mapped as permanent water due to the unique topography of the area, an additional step was taken to remove erroneous water features. In this situation, another mask was created based on the maximum water extent as identified from the WOfS archive. This mask can be used on a dry season product since it is not analysing extreme flood events.


The Australian Government commissioned CSIRO to complete the Northern Australia Water Resource Assessment (NAWRA) - an initiative of the Australian Government’s White Paper on Developing Northern Australia and the Agricultural Competitiveness White Paper, the government’s plan for stronger farmers and a stronger economy. Aspects of the Assessment were undertaken in conjunction with the Northern Territory Government, the Western Australian Government, and the Queensland Government.


Creative Commons Attribution 4.0 International Licence


CSIRO (Australia)


Ticehurst, Catherine (2018): Dry-season wetlands derived from Landsat archive for NAWRA. v1. CSIRO. Data Collection. https://doi.org/10.25919/5c0a052c3e391


All Rights (including copyright) CSIRO 2018.


The metadata and files (if any) are available to the public.

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Location Details

12°1′12″ S


19°21′0″ S


145°33′0″ E


123°2′60″ E


WGS84


About this Project

Northern Australian Basin Assessment:: Water Resource Assessments


This metadata record relates specifically to the stated body of work and was created for the Northern Australia Water Resource Assessment (NAWRA) project. The NAWRA project has undertaken a comprehensive and integrated evaluation of the feasibility, economic viability and sustainability of water resource development in three priority areas in north... more


Cuan Petheram





Catherine Ticehurst


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