A coupled surface-subsurface hydrologic model to assess groundwater flood risk spatially and temporally

Xuan Yu, Daniil Moraitis, Nikolaos P. Nikolaidis, Bailing Li, Christopher Duffy, Bingjun Liu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Floods introduced by rainfall events are responsible for tremendous economic and property losses. It is important to delineate flood prone areas to minimize flood damages and make mitigation plans. Recently, there has been recognition of the need to understand the risk from groundwater flooding caused by the emergence of groundwater at the ground surface. Mapping groundwater flood risk is more challenging compared to river flooding, especially in karst systems, where subsurface preferential flowpaths can affect groundwater flow. We developed a coupled surface-subsurface modelling framework resolving spatial information and hydrologic data to assess the groundwater flood risk at a karstic watershed: Koiliaris River Basin, Greece. The simulated groundwater table was used to delineate groundwater flooding. Modelled results revealed the role of faults in groundwater flooding generation. We anticipate the coupled surface-subsurface approach to be a starting point for more sophisticated flooding risk assessment, including magnitude and temporal duration of groundwater flooding.

Original languageEnglish
Pages (from-to)129-139
Number of pages11
JournalEnvironmental Modelling and Software
Volume114
DOIs
Publication statusPublished - Apr 1 2019

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Keywords

  • Coupled surface-subsurface model
  • Critical zone observatory
  • Groundwater flooding
  • Koiliaris river basin
  • PIHM
  • Risk assessment

ASJC Scopus subject areas

  • Software
  • Environmental Engineering
  • Ecological Modelling

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