2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2019 | 11:15 AM - 11:30 AM | DEVELOPMENT AND APPLICATION OF PREDICTIVE MODELS FOR SURFACE WATER EXTENT TO IDENTIFY AQUATIC REFUGIA IN EASTERN AUSTRALIA | 151 G
DEVELOPMENT AND APPLICATION OF PREDICTIVE MODELS FOR SURFACE WATER EXTENT TO IDENTIFY AQUATIC REFUGIA IN EASTERN AUSTRALIA
Aquatic biota living in intermittent streams rely on remnant surface water to survive during extended dry periods and recolonize newly established habitats when flow resumes. However, research on the spatial and temporal dynamics of surface water extent for entire river networks is scarce. We first demonstrate a newly developed methodology for rapid surface water assessment in the field, and then develop predictive models relating observed water extent to environmental attributes at a large number of surveyed stream reaches in eastern Australian coastal catchments. We use the models to predict daily variations in surface water dynamics throughout entire river networks over the past century (1911 – 2017), based on available long-term environmental attributes. We find descriptors of surface water extent can be accurately modelled, with good internal and external validation performance. Long-term variations in surface water extent were highly dynamic through space and time, although the overall length of river network with surface water remained relative stable from year to year. Our study presents a practical approach to quantifying and predicting variations in surface water extent and also provides valuable insights into the potential priority conservation areas for aquatic biota.
- Fragmentation
- Modeling
- Hydrology
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Presenters/Authors
Songyan Yu
(), Australian Rivers Institute, Griffith University, sunny.yu@griffith.edu.au;
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Nick Bond
(), La Trobe University, n.bond@latrobe.edu.au;
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Stuart Bunn
(), Australian Rivers Institute, Griffith University, Australia, s.bunn@griffith.edu.au;
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Mark Kennard
(), Australian Rivers Institute, Griffith University, m.kennard@griffith.edu.au;
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