Friends of Big Swamp
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    • Big Swamp
  • FLORA & FAUNA
    • Flora
    • Birds of Big Swamp >
      • Black Swan
      • Great Crested Grebe
      • New Holland Honeyeater
      • Musk Duck
      • Red Capped Parrot (or King Parrot)
      • Splendid Fairy Wren
      • Yellow Billed Spoonbill
    • Fauna >
      • Dragonflies and Damselflies >
        • Blue Skimmer Dragonfly
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    • Wildcare and Injured Animals
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  • Projects & Research
    • Bird Count
    • Water Balance Project 2016
    • Big Swamp Interpretive Loop Walk 2017
    • Field Survey of Flora and Fauna 2007
    • Weed Management 2007 - present
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​Projects and Research

Water Balance Project 2016

The Friends of Big Swamp in partnership with the City of Bunbury and the Leschenault Catchment Council obtained a State Natural Resource Management grant, which allowed them to plan and implement a 12-month water monitoring program to assess the various water inputs and outputs, and thus identify the water balance of the wetland. 

The water level has traditionally been maintained over summer through seasonal diversion of the adjacent Five-Mile-Brook into the swamp.  The project essentially aimed to investigate the impacts of climate change on the water balance and the ecology of the wetland.         

A complementary project was commenced shortly afterwards using a community grant from Worsley Alumina which allowed for sampling of the wetland for water chemistry analysis.  The combined water balance and quality data has increased knowledge of the system and will inform management decisions into the future.

Volunteers collected monthly, weekly and daily measurements from groundwater piezometers, water level gauges and rainfall gauges, with photo monitoring and a series of relative height measurements to piece the data all together.  Local hydrologist Heath Morgan of Strategen was appointed to generate the Big Swamp water balance model and make climate change predictions based on the data.  The water inputs identified include the Five-Mile Brook diversion, rainfall and catchment runoff, and groundwater interaction. 

​Outputs include an outlet weir flowing back into the brook, evapotranspiration and evaporation as  well as groundwater interaction.  The project revealed the relative volumes of the major inputs and outputs to the swamp, and which of these are expected to change with a drying climate. 

There is now an indication of water quality throughout the system as well as the source of nutrients into the wetland.  Predictions have been made as to which areas of the wetland are likely to be exposed in summer and how this may affect the water quality and ecology of the wetland; and how various management decisions may positively or negatively impact on the characteristics and overall health of the wetland.

The project is an example of how community and local government can contribute to the design and implementation of useful projects with significant benefits to future environmental management.

The final report from Strategen is before the City of Bunbury and will be released  in 2018.
Picture

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​Prince Philip Dr, South Bunbury WA 6230

Contact Us

friendsofbigswamp@mail.com
We would like to acknowledge the photographs supplied by David Addy, Terri Sharp, Bunbury Museum, Tom Brightwell, Maurice Colley, King Cottage Museum, Carol Strang.
Website by CloudStoke Media
  • About
    • Friends of Big Swamp
    • Big Swamp
  • FLORA & FAUNA
    • Flora
    • Birds of Big Swamp >
      • Black Swan
      • Great Crested Grebe
      • New Holland Honeyeater
      • Musk Duck
      • Red Capped Parrot (or King Parrot)
      • Splendid Fairy Wren
      • Yellow Billed Spoonbill
    • Fauna >
      • Dragonflies and Damselflies >
        • Blue Skimmer Dragonfly
    • Vermin Species and Management
    • Wildcare and Injured Animals
  • Location & Maps
  • Projects & Research
    • Bird Count
    • Water Balance Project 2016
    • Big Swamp Interpretive Loop Walk 2017
    • Field Survey of Flora and Fauna 2007
    • Weed Management 2007 - present
  • Photo Gallery
  • Contact
  • Supporters and Links
  • Regular Activities
  • Calendar