Bank Erosion Potential and Channel Instability in Haji Arab River Located in Buin Zahra, Qazvin

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Hosseinzadeh Mohammad Mahdi; Shayan Siavosh; Najafzadeh Fatemeh

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Journal Paper

Paper Information

Journal: GEOGRAPHY AND ENVIRONMENTAL HAZARDS Year:2022 | Volume:11 | Issue:1 Page(s): 39-56

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Information Journal Paper

Title

Bank Erosion Potential and Channel Instability in Haji Arab River Located in Buin Zahra, Qazvin

Author(s)

Hosseinzadeh Mohammad Mahdi | Shayan Siavosh | Najafzadeh Fatemeh | Issue Writer Certificate

Keywords

Rapid Geomorphic Assessment (RGA)

Stream Bank Stability

Channel Stability Index (CSI)

Haji Arab river

Fluvial Geomorphology

Abstract

Water flow is one of the earth processes that in addition to changing earth surface, affect human's life. Any change in channel properties affects other variables. Stream bank erosion is very important because entering a large part of the river sediments through erosion of the river bank changes some parts the river channel such as width and depth. It is also important as it affects the characteristics of river pattern and hazards that threaten people's lives and properties. The purpose of this study was to investigate the instability and morphometric changes of canal in Haji Arab river in Buin Zahra of Qazvin province. Rapid Geomorphic Assessment (RGA) was used for measuring the stability and morphometric changes in Haji Arab river. For this purpose 8 reaches were chosen. Indices of stability and instability along the bank stream were evaluated using cross-sectional mapping and field operations. The parameters of Channel Stability Index (CSI) were scored during the field works. The reaches were classified in terms of sensitivity to lateral erosion. The results show that the highly unstable stream banks belong to reaches of 7 and 8. Moreover, the distribution of data was determined using a Box Plot diagram. According to the relative score, it was found that the stream bank erosion and the vegetation of riparine are the most effective factors in the instability of the banks of Haji Arab river.

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