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Importance of river...
Importance of river bank and floodplain slopes on the accuracy of flood inundation mapping
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- Brandt, S. Anders, 1970- (author)
- Högskolan i Gävle,Samhällsbyggnad/GIS-Institutet,geomatik / geomatics
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- Lim, Nancy Joy, 1980- (author)
- Högskolan i Gävle,Samhällsbyggnad/GIS-Institutet,geomatik / geomatics
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(creator_code:org_t)
- Leiden, The Netherlands : CRC Press / Balkema (Taylor & Francis), 2012
- 2012
- English.
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In: River Flow 2012. - Leiden, The Netherlands : CRC Press / Balkema (Taylor & Francis). - 9780415621298 - 9780203076354 - 9781466575523 ; , s. 1015-1020
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Abstract
Subject headings
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- Effective flood assessment and management depend on accurate models of flood events, which in turn are strongly affected by the quality of digital elevation models (DEMs). In this study, HEC-RAS was used to route one specificwater discharge through the main channel of the Eskilstuna River, Sweden. DEMs with various resolutions and accuracies were used to model the inundation. The results showed a strong positive relationship between the quality of theDEMand the extent of the inundation. However, evenDEMswith the highest resolution produced inaccuracies. In another case study, the Testebo River, the model settings could be calibrated, thanks to a surveyed old inundation event. However, even with the calibration efforts, the resulting inundation extents showed varying degrees of deviation from the surveyed flood boundaries. Therefore, it becomes clear that not only does the resolution of the DEM impact the quality of the results; also, the floodplain slope perpendicular to the river flow will impact the modelling accuracy. Flatter areas exhibited the greatest predictive uncertainties regardless of the DEM’s resolution. For perfectly flat areas, uncertainty becomes infinite.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Annan samhällsbyggnadsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Other Civil Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Havs- och vattendragsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Ocean and River Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Fjärranalysteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Remote Sensing (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Keyword
- Flood Inundation
- Geographical Information Systems (GIS)
- LiDAR
- Digital Elevation Models (DEM)
- Hydrology
- Hydrologi
- Physical geography
- Naturgeografi
- Remote sensing
- Fjärranalys
- Surveying
- Lantmäteri
- Water in nature and society
- Vatten i natur och samhälle
Publication and Content Type
- ref (subject category)
- kon (subject category)
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