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| Titel |
Mid-level synoptic analysis of flood-generating systems in South-west of Iran (case study: Dalaki watershed river basin) |
| VerfasserIn |
A. A. Sabziparvar, A. Parandeh, H. Lashkari, H. Yazdanpanah |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 10, no. 11 ; Nr. 10, no. 11 (2010-11-16), S.2269-2279 |
| Datensatznummer |
250008497
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| Publikation (Nr.) |
 copernicus.org/nhess-10-2269-2010.pdf |
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| Zusammenfassung |
| Flood is known as one of the most distractive natural disaster worldwide.
Therefore, its prediction is of great importance from the socio-economical
point of view. Despite the great improvement in computational techniques and
numerical weather prediction approaches, so far, in Iran, an acceptable flood
prediction method has not yet been introduced. The main aim of this study is
to recognize and classify the patterns of synoptic systems leading to
torrential rainfalls in a watershed basin located in south-west of Iran. In
this research, 20 major floods characterized by high rainfall intensities and
severe damage were selected. The pattern, extension, and the direction of
movement of the selected synoptic maps from surface to 500 hPa pressure
levels were identified. Furthermore, the position of cyclones, anti-cyclones
and mid-level trough lines were carefully tracked and classified into
different groups. The results show that the major severe floods occurring in
Dalaki watershed river basin are mainly influenced by strengthening of the
center of Sudan heat low (SHL) and the coincidence moisture feeding by the
Indian Ocean and Mediterranean Sea. It was found that simultaneous merging of
the SHL system and Mediterranean frontal system would intensify the flood
intensities over the basin. The mean positions of high pressures, low
pressures, the Red Sea trough lines and 1015 hPa isobars of the major floods
are also discussed. |
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