Assessment the flood hazard arising from land use change in a forested catchment in northern Iran

Hajian, Farhad, Dykes, Alan P. and Cavanagh, Sandra (2018) Assessment the flood hazard arising from land use change in a forested catchment in northern Iran. Journal of Flood Risk Management, ISSN (online) 1753-318X (Epub Ahead of Print)

Full text available as:
[img]
Preview
Text
Hajian-F-41347-AAM.pdf - Accepted Version

Download (1MB) | Preview

Abstract

The provinces of northern Iran that border the Caspian Sea are forested and may be prone to increased risks of flooding due to deforestation and other land use changes, in addition to climate change effects. This research investigated changes in runoff from a small forested catchment in northern Iran for several land use change scenarios and the effects of higher rainfall and high antecedent soil moisture. Peak discharges and total runoff volumes from the catchment were estimated using the US Soil Conservation Service 'Curve Number' (SCS-CN) method and the SCS dimensionless unit hydrograph. This method was selected for reasons of data availability and operational simplicity for flood managers. A GIS was used to manipulate spatial data for use in the catchment runoff modelling. The results show that runoff is predicted to increase as a result of deforestation, which is dependent on the proportion of the catchment area affected. However, climate change presents a significant flood hazard even in the absence of deforestation. Other land use changes may reduce the peak discharges of all return period floods. Therefore a future ban on timber extraction, combined with agricultural utilisation of rangeland, could prove effective as 'nature-based' flood reduction measures throughout northern Iran.

Item Type: Article
Research Area: Geography and environmental studies
Faculty, School or Research Centre: Faculty of Science, Engineering and Computing > School of Engineering
Depositing User: Susan Miles
Date Deposited: 23 Jul 2018 08:00
Last Modified: 10 Jul 2019 02:05
DOI: https://doi.org/10.1111/jfr3.12481
URI: http://eprints.kingston.ac.uk/id/eprint/41347

Actions (Repository Editors)

Item Control Page Item Control Page