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Application of Incomplete Topography Information and Public Data for Preliminary Flood Risk Assessment in Thailand: Case Study of Khlong Wat.

cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.author-orcid0000-0002-7035-9874
cris.virtual.author-orcid0000-0003-0926-5462
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcid2d571207-6c12-4387-94a1-bf7767fa5220
cris.virtualsource.author-orcidfdcac286-975b-41b9-92e7-2e8e7293f6ed
dc.abstract.enFlood hazard mapping remains challenging in regions with limited hydrological and topographic data, despite increasing flood risk driven by climate change and land-use dynamics. This study aims to demonstrate that preliminary flood inundation maps can be developed under data-scarce conditions by integrating limited field observations with publicly available datasets and simplified hydrodynamic modeling. The Khlong Wat watershed in southern Thailand, where flood hazard maps had not previously existed despite recurrent flood events, was used as a case study. Flood simulations were conducted using the HEC-RAS model with a simplified terrain representation to approximate river bathymetry, acknowledging uncertainties in channel geometry. Hydrodynamic results show a systematic increase in flood extent and depth with increasing flood recurrence intervals, with inundated areas expanding from 1.43 km2 for a 10-year flood to 4.02 km2 and 5.97 km2 for 100- and 500-year events, respectively. Agricultural land is consistently the most affected category, accounting for more than two-thirds of the flooded area across all scenarios, with rubber plantations being the dominant land use. Urban exposure increases with flood magnitude, although most buildings remain affected by shallow inundation below 0.5 m. The results confirm that meaningful flood hazard assessments can be achieved in data-limited regions and provide a transferable framework to support flood risk management and spatial planning in similar environments.
dc.affiliationWydział Inżynierii Środowiska i Inżynierii Mechanicznej
dc.affiliation.instituteKatedra Inżynierii Wodnej i Sanitarnej
dc.contributor.authorSupanon, Kaiwong
dc.contributor.authorDysarz, Tomasz
dc.contributor.authorWicher-Dysarz, Joanna
dc.date.access2026-03-23
dc.date.accessioned2026-03-23T12:17:42Z
dc.date.available2026-03-23T12:17:42Z
dc.date.copyright2026-03-19
dc.date.issued2026
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0,00
dc.description.if3,0
dc.description.number6
dc.description.points100
dc.description.versionfinal_published
dc.description.volume18
dc.identifier.doi10.3390/w18060743
dc.identifier.issn2073-4441
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/7874
dc.identifier.weblinkhttps://www.mdpi.com/2073-4441/18/6/743
dc.languageen
dc.pbn.affiliationenvironmental engineering, mining and energy
dc.relation.ispartofWater (Switzerland)
dc.relation.pagesart. 743
dc.rightsCC-BY
dc.sciencecloudnosend
dc.share.typeOPEN_JOURNAL
dc.subject.enflood hazard mapping
dc.subject.enflood risk analysis
dc.subject.enHEC-RAS
dc.subject.enKhlong Wat river
dc.titleApplication of Incomplete Topography Information and Public Data for Preliminary Flood Risk Assessment in Thailand: Case Study of Khlong Wat.
dc.title.volumeSpecial Issue Hydrological Hazards: Monitoring, Forecasting and Risk Assessment
dc.typeJournalArticle
dspace.entity.typePublication