Investigation of Effective Factors Role on 18 March 2019 Floods of Kiakola in Mazandaran Province by HEC-RAS Model

Document Type : Research

Authors

1 Soil Conservation and Watershed Management Research Department, Mazandaran Agriculture and Natural Resources Research and Education Center, AREEO, Sari, Iran.

2 Assistant Professor of Mazandaran Agricultural and Natural Resources Education and Research Center, Soil Protection and Watershed Management Department

10.22092/wmrj.2024.364406.1564

Abstract

Among the various natural hazards, floods are more frequent disaster in all around the world which has many environmental, social and economic affects. Flood plains and regions adjacent to rivers, since of special merits, has good space for socio- economical activities and always are in front of dangerous from flood events. Flood is one of the disasters and natural hazards which annually endangers millions of human life. Iran isn’t out of this hazards and bearing a huge financial damages and human causality every year.
Climate change shows reduction of total rainfall and emergence of extreme events like drought and heavy rain storm in Mazandaran province. Flash storm in short time make much volume of precipitation that induce various problems for human, plants and animals. 18 March 2019 floods had some financial damages in Simorgh City. Hydraulic simulation from upstream to downstream of Kiakola town causes to find the inundation factors and prevent to repeat of such events. Purpose of this research is simulation of floods in Telar river in Kiakola town by HEC-RAS model. The Study reach was 10 km with Three bridges, Najjarkola, Mollakola and Borjkheil. All geometric dimensions of bridges with geographic coordinates, See Level Elevations and distances of 21 cross sections which surveyed by Theodolite and GPS multi frequency device. Frequency distribution analysis were done by Easy Fit Software on historical discharge of Kiakola Hydrometric station showed that return period of peak discharge on 18 March 2019 hydrograph was 24 years. Simulation of 18 March 2019 hydrograph on study reach indicated that All cross sections and three bridges have enough capacity for water flow conveyance. Kiakola and Neighbor villages inundation caused by Bridge span obstacle which made by trunks, branches, garbage which carried out from upstream basins. It emphasis on the importance of watershed management to prevent the natural hazard events. There was no invasion to river beds in both sides in study reach, but majority of river limits in both sides were invaded by cultivation of fruits like citrus trees but had no influence on flood inundation. Keywords: Flood Discharge, Flood Simulation, HEC-RAS, Inundation.
Keywords: Flood Discharge, Flood Simulation, HEC-RAS, Inundation

Keywords

Main Subjects

Watershed Management Research Journal

Articles in Press, Accepted Manuscript
Available Online from 18 March 2024

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History

  • Receive Date: 19 December 2023
  • Revise Date: 14 January 2024
  • Accept Date: 18 March 2024

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