Effect of El Nino-Southern Oscillation on Annual Maximum Flood in Southwestern of Iran

Flood forecasting and the study of the factors involved in flood events form important issues of concern in water resources management. In recent years, the influence of large-scale global climate phenomena on flood peaks has attracted more attention. In this paper, the effect of El Nino-Southern Os...

Full description

Bibliographic Details
Main Authors: Amin Haghnegahdar, Bahram Saghafian, Roohangiz Akhtari
Format: Article
Language:English
Published: Water and Wastewater Consulting Engineers Research Development 2007-12-01
Series:آب و فاضلاب
Subjects:
AMF
Online Access:http://www.wwjournal.ir/article_2160_ed74e80e30702ecdef6fff4349472dc8.pdf
id doaj-280f3686074f453aaaa07b1935681327
record_format Article
spelling doaj-280f3686074f453aaaa07b19356813272021-04-02T14:19:02ZengWater and Wastewater Consulting Engineers Research Developmentآب و فاضلاب1024-59362383-09052007-12-0118466782160Effect of El Nino-Southern Oscillation on Annual Maximum Flood in Southwestern of IranAmin Haghnegahdar0Bahram Saghafian1Roohangiz Akhtari2Former Research Associate, Soil Conservation and Watershed Management Research InstituteAssoc. Prof., Soil Conservation and Watershed Management Research InstituteFormer Research Associate, Soil Conservation and Watershed Management Research InstituteFlood forecasting and the study of the factors involved in flood events form important issues of concern in water resources management. In recent years, the influence of large-scale global climate phenomena on flood peaks has attracted more attention. In this paper, the effect of El Nino-Southern Oscillation (ENSO) is investigated on annual maximum flood (AMF) in Iran’s southwestern basins. The basins are located upstream of Dez and Karun-I dams. ENSO effects on probability, magnitude, and intensity (probability times magnitude) of AMF in the Esfand-Farvardin (March-April) period are examined. The results indicate that following El Nino, the probability of an AMF occurrence larger than the AMF corresponding to neutral ENSO conditions is higher in the study period. The opposite is true for La Nina conditions. It is also seen that El Nino effects are more intense than those of La Nina period.http://www.wwjournal.ir/article_2160_ed74e80e30702ecdef6fff4349472dc8.pdfClimate SignalsENSOEl NinoSouthern OscillationAMFSouthwestern of Iran
collection DOAJ
language English
format Article
sources DOAJ
author Amin Haghnegahdar
Bahram Saghafian
Roohangiz Akhtari
spellingShingle Amin Haghnegahdar
Bahram Saghafian
Roohangiz Akhtari
Effect of El Nino-Southern Oscillation on Annual Maximum Flood in Southwestern of Iran
آب و فاضلاب
Climate Signals
ENSO
El Nino
Southern Oscillation
AMF
Southwestern of Iran
author_facet Amin Haghnegahdar
Bahram Saghafian
Roohangiz Akhtari
author_sort Amin Haghnegahdar
title Effect of El Nino-Southern Oscillation on Annual Maximum Flood in Southwestern of Iran
title_short Effect of El Nino-Southern Oscillation on Annual Maximum Flood in Southwestern of Iran
title_full Effect of El Nino-Southern Oscillation on Annual Maximum Flood in Southwestern of Iran
title_fullStr Effect of El Nino-Southern Oscillation on Annual Maximum Flood in Southwestern of Iran
title_full_unstemmed Effect of El Nino-Southern Oscillation on Annual Maximum Flood in Southwestern of Iran
title_sort effect of el nino-southern oscillation on annual maximum flood in southwestern of iran
publisher Water and Wastewater Consulting Engineers Research Development
series آب و فاضلاب
issn 1024-5936
2383-0905
publishDate 2007-12-01
description Flood forecasting and the study of the factors involved in flood events form important issues of concern in water resources management. In recent years, the influence of large-scale global climate phenomena on flood peaks has attracted more attention. In this paper, the effect of El Nino-Southern Oscillation (ENSO) is investigated on annual maximum flood (AMF) in Iran’s southwestern basins. The basins are located upstream of Dez and Karun-I dams. ENSO effects on probability, magnitude, and intensity (probability times magnitude) of AMF in the Esfand-Farvardin (March-April) period are examined. The results indicate that following El Nino, the probability of an AMF occurrence larger than the AMF corresponding to neutral ENSO conditions is higher in the study period. The opposite is true for La Nina conditions. It is also seen that El Nino effects are more intense than those of La Nina period.
topic Climate Signals
ENSO
El Nino
Southern Oscillation
AMF
Southwestern of Iran
url http://www.wwjournal.ir/article_2160_ed74e80e30702ecdef6fff4349472dc8.pdf
work_keys_str_mv AT aminhaghnegahdar effectofelninosouthernoscillationonannualmaximumfloodinsouthwesternofiran
AT bahramsaghafian effectofelninosouthernoscillationonannualmaximumfloodinsouthwesternofiran
AT roohangizakhtari effectofelninosouthernoscillationonannualmaximumfloodinsouthwesternofiran
_version_ 1721562541227769856