Flood hazard zoning using HEC-RAS Hydraulic Model and ArcGIS (Case Study: CheshmehKileh River in Tonekabon County)

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Pornaby Darzi Somaye; VAFAKHAH MEHDI; Rajabi Mohammad Rasol

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Journal Paper

Paper Information

Journal: JOURNAL OF NATURAL ENVIRONMENT HAZARDS Year:2021 | Volume:10 | Issue:28 Page(s): 15-28

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Information Journal Paper

Title

Flood hazard zoning using HEC-RAS Hydraulic Model and ArcGIS (Case Study: CheshmehKileh River in Tonekabon County)

Author(s)

Pornaby Darzi Somaye | VAFAKHAH MEHDI | Rajabi Mohammad Rasol | Issue Writer Certificate

Keywords

flood zonationQ1

HEC-RASQ1

floodQ2

Flood damageQ1

land useQ1

Abstract

Flood is defined as “ streamflow with high discharge which spreads temporary on the lands nearby the main river” and consequently there will be some risks. Due to proper conditions, most of the economic and social activities take place in these areas. Therefore, it is important to determine flood zonation due to flood discharge with different return periods in these areas. In this regard, the Cheshmehkileh River located in Tonekabon Township has vast river boundary zones and most of the economic and social activities are carried out in its neighborhood, which is susceptible to flood hazard according to flood conditions and occurred floods. The cross sections were derived using the digital elevation model (DEM) with scale of 1: 1000 in Arc/GIS environment and HEC-GeoRAS extension and the obtained outputs were entered into HEC-RAS hydraulic software. Manning roughness coefficients and flood discharge with five return periods of 2, 5, 10, 25, 50 and 100-year were entered into HEC-RAS model and water surface profile was computed in flow path and flood zonation for different return periods was derived using the HEC-RAS output information through geographical information system. The obtained results showed that the longer the return period, the wider the surface affected by flood. Also, the highest flood area is related to agricultural land use with an area of 6. 24 ha and after residential land uses with an area of 3. 94 ha, forest with an area of 2. 9 ha and orchard of an area of 0. 8 ha were located at the following ranks.

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APA: Copy

Pornaby Darzi, Somaye, VAFAKHAH, MEHDI, & Rajabi, Mohammad Rasol. (2021). Flood hazard zoning using HEC-RAS Hydraulic Model and ArcGIS (Case Study: CheshmehKileh River in Tonekabon County). JOURNAL OF NATURAL ENVIRONMENT HAZARDS, 10(28 ), 15-28. SID. https://sid.ir/paper/409898/en

Vancouver: Copy

Pornaby Darzi Somaye, VAFAKHAH MEHDI, Rajabi Mohammad Rasol. Flood hazard zoning using HEC-RAS Hydraulic Model and ArcGIS (Case Study: CheshmehKileh River in Tonekabon County). JOURNAL OF NATURAL ENVIRONMENT HAZARDS[Internet]. 2021;10(28 ):15-28. Available from: https://sid.ir/paper/409898/en

IEEE: Copy

Somaye Pornaby Darzi, MEHDI VAFAKHAH, and Mohammad Rasol Rajabi, “Flood hazard zoning using HEC-RAS Hydraulic Model and ArcGIS (Case Study: CheshmehKileh River in Tonekabon County),” JOURNAL OF NATURAL ENVIRONMENT HAZARDS, vol. 10, no. 28 , pp. 15–28, 2021, [Online]. Available: https://sid.ir/paper/409898/en

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