Flood risk zoning using geographical information system case study : Khorramabad Flood in April 2019

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

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.

• Language: English
• Keywords: flood risk zoning, weighted overlay, GIS, Khorramrud River, Khorramabad city
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: Str. 89-100
• Numbering: Vol. 35, no. 63
• PID: 20.500.12556/RUL-163513
• UDC: 556.166:911.2(282)(55Khorramabad)
• ISSN on article: 0352-3551
• DOI: 10.15292/acta.hydro.2022.07
• COBISS.SI-ID: 210626307
• Publication date in RUL: 08.10.2024

Record is a part of a journal

• Title: Acta hydrotechnica
• Publisher: Fakulteta za gradbeništvo in geodezijo
• ISSN: 0352-3551
• COBISS.SI-ID: 3664386

Licences

• License: CC BY-NC-SA 4.0, Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Description: A Creative Commons license that bans commercial use and requires the user to release any modified works under this license.

Secondary language

• Language: Slovenian
• Title: Določanje območij poplavne ogroženosti z uporabo geografskega informacijskega sistema, študija primer : poplava v Kharramabadu, Iran, aprila 2019

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.

• Keywords: določanje poplavnih območij, utežno prekrivanje, GIS, reka Khorramrud, mesto Khorramabad