AIZM model – advantages and limits of flood delineation by GIS
model

a 2018

AIZM model – advantages and limits of flood delineation by GIS model

CALETKA, Martin a Monika ŠULC MICHALKOVÁ

Základní údaje

Originální název

AIZM model – advantages and limits of flood delineation by GIS model

Název česky

Model AIZM - přednosti a limity vymezování povodňových rozlivů pomocí modelu v GIS

Autoři

CALETKA, Martin a Monika ŠULC MICHALKOVÁ

Vydání

European Geosciences Union General Assembly 2018, 2018

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10501 Hydrology

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/18:00102347

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova česky

floods; floodplain delineation; AIZM; GIS model

Klíčová slova anglicky

povodňe; vyhraničení rozlivů; AIZM; GIS model

Příznaky

Mezinárodní význam

Změněno: 12. 11. 2018 14:39, Mgr. Monika Šulc Michalková, Ph.D. et Ph.D.

Anotace

V originále

The Alternative Indicative Inundation Model (AIZM) is a GIS-based tool for the delineation of flood extents using the water heights relative to digital elevation model. The tool is composed of several sub-models in the ESRI ArcGIS ModelBuilder. In contrast to most traditional hydrodynamic models, hydraulics is omitted which is compensated for by ease of application and low demands on both the input data and computational capacity. Our study presents an analysis of flood extents delineated by the AIZM model for 30 diverse river reaches in the Czech Republic on the basis of flood marks‘ elevations from catastrophic flood events which occurred in summer 1997, summer 2002 and spring 2006. The accuracy of the outputs has been assessed through the comparison with corresponding inundation extents, as mapped from in situ observations and aerial imagery. It has been proved that the AIZM model is able to deliver inundation extents with accuracy comparable with that of hydrodynamic models. The median difference of the modelled flood extents and benchmarks is 21 %. Non-metric multidimensional scaling and cluster analyses have been conducted. It has been found out that longitudinal slope and channel width pose the most important of all evaluated characteristics of river reaches influencing the accuracy of the delineated flood extents. Predominance of flood extents with good accuracy has been recorded for river reaches with wider channels (approximately more than 15 m) and smaller longitudinal slopes (less than 3 h. Presence of transverse barriers over floodplains, such as road or railway embankments and also the transmission capacity of bridges and culverts in their bodies are the important factors influencing the accuracy of the outputs.

Citovat

CALETKA, Martin a Monika ŠULC MICHALKOVÁ. AIZM model – advantages and limits of flood delineation by GIS model. In European Geosciences Union General Assembly 2018. 2018.

@proceedings{1409539,
   author = {Caletka, Martin and Šulc Michalková, Monika},
   booktitle = {European Geosciences Union General Assembly 2018},
   keywords = {povodňe; vyhraničení rozlivů; AIZM; GIS model},
   language = {eng},
   title = {AIZM model – advantages and limits of flood delineation by GIS model},
   url = {https://meetingorganizer.copernicus.org/EGU2018/EGU2018-16695.pdf},
   year = {2018}
}

TY  - CONF
ID  - 1409539
AU  - Caletka, Martin - Šulc Michalková, Monika
PY  - 2018
TI  - AIZM model – advantages and limits of flood delineation by GIS model
KW  - povodňe
KW  - vyhraničení rozlivů
KW  - AIZM
KW  - GIS model
UR  - https://meetingorganizer.copernicus.org/EGU2018/EGU2018-16695.pdf
L2  - https://meetingorganizer.copernicus.org/EGU2018/EGU2018-16695.pdf
N2  - The Alternative Indicative Inundation Model (AIZM) is a GIS-based tool for the delineation of flood extents using the water heights relative to digital elevation model. The tool is composed of several sub-models in the ESRI ArcGIS ModelBuilder. In contrast to most traditional hydrodynamic models, hydraulics is omitted which is compensated for by ease of application and low demands on both the input data and computational capacity. Our study presents an analysis of flood extents delineated by the AIZM model for 30 diverse river reaches in the Czech Republic on the basis of flood marks‘ elevations from catastrophic flood events which occurred in summer 1997, summer 2002 and spring 2006. The accuracy of the outputs has been assessed through the comparison with corresponding inundation extents, as mapped from in situ observations and aerial imagery. It has been proved that the AIZM model is able to deliver inundation extents with accuracy comparable with that of hydrodynamic models. The median difference of the modelled flood extents and benchmarks is 21 %. Non-metric multidimensional scaling and cluster analyses have been conducted. It has been found out that longitudinal slope and channel width pose the most important of all evaluated characteristics of river reaches influencing the accuracy of the delineated flood extents. Predominance of flood extents with good accuracy has been recorded for river reaches with wider channels (approximately more than 15 m) and smaller longitudinal slopes (less than 3 h. Presence of transverse barriers over floodplains, such as road or railway embankments and also the transmission capacity of bridges and culverts in their bodies are the important factors influencing the accuracy of the outputs.
ER  -

CALETKA, Martin a Monika ŠULC MICHALKOVÁ. AIZM model – advantages and limits of flood delineation by GIS model. In \textit{European Geosciences Union General Assembly 2018}. 2018.

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