2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/26/2021 | 8:30 AM - 10:30 AM | CLIMATE CHANGE IMPLICATIONS FOR STREAMFLOW INTERMITTENCY AND SURFACE WATER PERSISTENCE IN EASTERN AUSTRALIA | Virtual Platform
CLIMATE CHANGE IMPLICATIONS FOR STREAMFLOW INTERMITTENCY AND SURFACE WATER PERSISTENCE IN EASTERN AUSTRALIA
Climate change is rapidly impacting the hydrological cycle and thus the availability of water to sustain freshwater biodiversity in intermittent rivers and streams. During extended dry periods, persistent riverine pools provide essential refuges for aquatic biodiversity in intermittent systems. However, our understanding of how surface water availability changes in response to projected increases in climate variability and extreme events such as droughts in Australia is critically lacking. The Australian Bureau of Meteorology has recently developed high resolution future projections of gridded daily runoff at the national scale. Taking advantage of these data, we simulated river discharge at a daily time step across south-east Queensland (SEQ) river networks for the recent-future period of 2006 - 2099. We further quantified spatio-temporal dynamics of streamflow intermittency and developed a statistical model to estimate future variations in surface water extent. Results showed that streamflow intermittency in SEQ was projected to increase under most climate change scenarios. This has significant implications for surface water persistence within intermittent streams, posing threats to obligate aquatic species surviving extended dry periods. This study can inform management and conservation of aquatic biodiversity in intermittent streams in a drying climate.
- Dry rivers
- Flow regime
- Habitat
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Presenters/Authors
Songyan Yu
(), Australian Rivers Institute, Griffith University, sunny.yu@griffith.edu.au;
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Elisabeth Vogel
(), Australian Bureau of Meteorology, Elisabeth.Vogel@bom.gov.au;
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Ulrike Bende-Michl
(), Australian Bureau of Meteorology, ulrike.bende-michl@bom.gov.au;
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Mark Kennard
(), Australian Rivers Institute, Griffith University, m.kennard@griffith.edu.au;
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