THE RESPONSE OF FLUVIAL SYSTEMS TO LARGE FLOOD EVENTS

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JAHADI TOROGHI M.; HOSSINZADEH S.R.

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Journal Paper

Paper Information

Journal: Environmental Erosion Research Year:2012 | Volume:1 | Issue:4 Page(s): 69-86

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Information Journal Paper

Title

THE RESPONSE OF FLUVIAL SYSTEMS TO LARGE FLOOD EVENTS

Author(s)

JAHADI TOROGHI M. | HOSSINZADEH S.R. | Issue Writer Certificate

Keywords

LARGE FLOOD EVENTSQ2

GEOMORPHIC IMPACTSQ2

FLUVIAL SYSTEM RESPONSESQ2

GEOMORPHIC INSTABILITYQ2

MADARSOO RIVERQ2

Abstract

In the Summer of 2001, an intense thunderstorm in the southeastern Caspian Sea triggered a catastrophic flood in the Madarsoo Basin. Methods that included high-resolution aerial photographs, interpretation of satellite images, multi-date mapping, hydraulic calculations and field observations enabled documentation of the geomorphic impact of this flood on the MADARSOO RIVER and its tributaries. Geomorphologic effects of this catastrophic flooding included the uprooting of trees up to 2 m in diameter from the main river channels; locally as much as 80% of the tree crown cover was removed from the riparian zones. Uprooting of the trees exposed the underlying flood plain to macro turbulent scour, leading to extensive removal of flood plain sediments that had accumulated over centuries. Other hydro-geomorphic impacts of this flood have been drainage network modifications, the creation of new alluvial fans, and a new meandering pattern and gully development, all of which have been documented. Subsequent to the mentioned flood, two other extreme floods have also affected this basin in August of 2002 and 2005. In addition to causing further landform modifications, these floods wiped out the infrastructure which had been reconstructed after 2001. All three floods were of the same conditions based on their time, climatic and triggering characteristics. The peak flood was estimated to be 700 m3/s in August 2002 and 1060 m3/s in August 2005. The occurrences of the two above mentioned catastrophic floods and related processes were the result of triggering variables and the formation new dynamic environments by the main event (August 2001 flood), which prolonged the required time for recovery of the stream channels. Geomorphic instabilities lead to consecutive crises in this new environment. This condition accelerated geomorphic hazards in combination with the effects of the recent climate.

Cites

PALEOFLOOD HYDROLOGY, NEW APPROACH OF MODERN GEOMORPHOLOGY IN FLOOD HAZARD ASSESSMENT

References

GEOMORPHOLOGIC ANALYSIS OF CATASTROPHIC FLOODS OF MADARSOO RIVER (NORTH-EASTERN IRAN)

Cite

APA: Copy

JAHADI TOROGHI, M., & HOSSINZADEH, S.R.. (2012). THE RESPONSE OF FLUVIAL SYSTEMS TO LARGE FLOOD EVENTS. ENVIRONMENTAL EROSION RESEARCHES, 1(4), 69-86. SID. https://sid.ir/paper/223088/en

Vancouver: Copy

JAHADI TOROGHI M., HOSSINZADEH S.R.. THE RESPONSE OF FLUVIAL SYSTEMS TO LARGE FLOOD EVENTS. ENVIRONMENTAL EROSION RESEARCHES[Internet]. 2012;1(4):69-86. Available from: https://sid.ir/paper/223088/en

IEEE: Copy

M. JAHADI TOROGHI, and S.R. HOSSINZADEH, “THE RESPONSE OF FLUVIAL SYSTEMS TO LARGE FLOOD EVENTS,” ENVIRONMENTAL EROSION RESEARCHES, vol. 1, no. 4, pp. 69–86, 2012, [Online]. Available: https://sid.ir/paper/223088/en

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