Flood risk zoning using geographical information system case study

Khorramabad Flood in April 2019

Parastoo Karimi (Author), Payam Alemi Safaval (Author), Saeed Behzadi (Author), Zahra Azizi (Author), Mir Masoud Kheirkhah Zarkash (Author), Hamide Kavusi Kalashami (Author)

Abstract

Today, there are varieties of methods for determining the risk of flooding in different areas of a catchment. However, the use of GIS-based weighting is receiving increasing attention among researchers. In early 2019, severe and continuous floods occurred in some provinces of Iran. Khorramabad was one of the cities most affected by the floods. Regrettably, during the construction development of Khorramabad city, the minimum distance from roads was violated. In this study, flood risks in the area were zoned using a GIS-weighted overlay algorithm. Flood zoning was done based on various maps indicating factors such as rainfall, distance from the waterway, soil composition, waterway density, slope, soil permeability, land use, and vegetation. The flooding area then was parceled into six categories with return periods of 10, 30, and 50 years. As a result, the city was divided into three critical areas in terms of flood risk. The results indicate that the confluence of the Karganeh and Khorram–Rud rivers lacks sufficient capacity to withstand and repel floods. As a result, the city will suffer severe damage in future floods.

Keywords

flood risk zoning;weighted overlay;GIS;Khorramrud River;Khorramabad city;

Data

Language:	English
Year of publishing:	2022
Typology:	1.01 - Original Scientific Article
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
UDC:	556.166:911.2(282)(55Khorramabad)
COBISS:	210626307
ISSN:	0352-3551
Views:	31
Downloads:	2743
Average score:	0 (0 votes)
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Other data

Secondary language:	Slovenian
Secondary title:	Določanje območij poplavne ogroženosti z uporabo geografskega informacijskega sistema, študija primer
Secondary abstract:	Danes obstajajo različne metode za določanje poplavne ogroženosti na različnih območjih povodja. Uporaba orodij GIS je med raziskovalci deležna vse več pozornosti. V začetku leta 2019 so se v nekaterih provincah Irana pojavile hude in neprekinjene poplave. Khorramabad je bilo eno izmed mest, ki so jih poplave najbolj prizadele. Zaradi gradbenih posegov v mestu je prišlo do poslabšanja stanja cest. V tej študiji so bila za to območje določena poplavno ogrožena območja z GIS-algoritmom utežnega prekrivanja. Določitev poplavnih območij je temeljila na podlagi različnih kart, kot so karte padavin, oddaljenosti od plovnih poti, pedoloških kart, gostote rečne mreže, naklona, prepustnosti tal, rabe tal in vegetacije. Poplave so bile razvrščene v šest kategorij s povratnimi dobami 10, 30 in 50 let. Na podlagi tega je bilo mesto razdeljeno v tri kritična območja glede poplavne ogroženosti. Rezultati kažejo, da sotočje rek Karganeh in Khorram-Rud nima potrebne zmogljivosti za preprečevanje poplav; v prihodnjih poplavah bo mesto znova utrpelo resno škodo.
Secondary keywords:	določanje poplavnih območij;utežno prekrivanje;GIS;reka Khorramrud;mesto Khorramabad;
Type (COBISS):	Article
Pages:	str. 89-100
Volume:	ǂVol. ǂ35
Issue:	ǂno. ǂ63
Chronology:	Dec. 2022
DOI:	10.15292/acta.hydro.2022.07
ID:	25250356