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Comparing static and dynamic flood models in estuarine environments: a case study from south-east Australia

Journal Article


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Abstract


  • Static and dynamic flood models differ substantially in their complexity and their ability to represent

    environmental processes such as storm tide or riverine flooding. This study analysed spatial differences in flood extent

    between static (bathtub) and dynamic flood models (Delft3D) in estuarine environments with different morphology and

    hydrodynamics in order to investigate which approach is most suitable to map flooding due to storm surges and river

    discharge in estuarine environments. Time series of observed water levels and river discharge measurements were used to

    force model boundaries. Observational data, such as tidal gauge and water level logger measurements, satellite imagery

    and aerial photography, were used to validate modelling results. Flood extents were calculated including and excluding

    river discharge to quantify and investigate its effect on the mapping of flooding. Modelling results indicate that the mature

    estuarine system, which has largely infilled broad flood plains, requires a consideration of bottom friction and riverine

    discharge through dynamic modelling techniques, whereas static models may provide an alternative approach to map

    flooding at low cost and low computational expense in young lake-like estuarine systems that have not been infilled with

    sediments. Our results suggest that estuarine classifications based on geomorphological characteristics can potentially

    guide flood risk assessments in estuarine environments.

Publication Date


  • 2019

Citation


  • Kumbier, K., Carvalho, R. C., Vafeidis, A. T. & Woodroffe, C. D. (2019). Comparing static and dynamic flood models in estuarine environments: a case study from south-east Australia. Marine and Freshwater Research, 70 781-793.

Scopus Eid


  • 2-s2.0-85060940184

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1523&context=smhpapers1

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/511

Number Of Pages


  • 12

Start Page


  • 781

End Page


  • 793

Volume


  • 70

Place Of Publication


  • Australia

Abstract


  • Static and dynamic flood models differ substantially in their complexity and their ability to represent

    environmental processes such as storm tide or riverine flooding. This study analysed spatial differences in flood extent

    between static (bathtub) and dynamic flood models (Delft3D) in estuarine environments with different morphology and

    hydrodynamics in order to investigate which approach is most suitable to map flooding due to storm surges and river

    discharge in estuarine environments. Time series of observed water levels and river discharge measurements were used to

    force model boundaries. Observational data, such as tidal gauge and water level logger measurements, satellite imagery

    and aerial photography, were used to validate modelling results. Flood extents were calculated including and excluding

    river discharge to quantify and investigate its effect on the mapping of flooding. Modelling results indicate that the mature

    estuarine system, which has largely infilled broad flood plains, requires a consideration of bottom friction and riverine

    discharge through dynamic modelling techniques, whereas static models may provide an alternative approach to map

    flooding at low cost and low computational expense in young lake-like estuarine systems that have not been infilled with

    sediments. Our results suggest that estuarine classifications based on geomorphological characteristics can potentially

    guide flood risk assessments in estuarine environments.

Publication Date


  • 2019

Citation


  • Kumbier, K., Carvalho, R. C., Vafeidis, A. T. & Woodroffe, C. D. (2019). Comparing static and dynamic flood models in estuarine environments: a case study from south-east Australia. Marine and Freshwater Research, 70 781-793.

Scopus Eid


  • 2-s2.0-85060940184

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1523&context=smhpapers1

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/511

Number Of Pages


  • 12

Start Page


  • 781

End Page


  • 793

Volume


  • 70

Place Of Publication


  • Australia