Paper presented to the 5th International Conference on Flood Management (ICFM5) in Tokyo from 27 to 29 September 2011. Topic 1: Flood Risk Management (Prevention, Mitigation and Adaptation). 1.5 Climate change adaptation.
Are periurban areas key places to mitigate urban inundations?
Article first published online: 24 OCT 2012
© 2012 Blackwell Publishing Ltd and The Chartered Institution of Water and Environmental Management (CIWEM)
Journal of Flood Risk Management
Volume 6, Issue 2, pages 124–134, June 2013
How to Cite
Radojevic, B., Breil, P. and Chocat, B. (2013), Are periurban areas key places to mitigate urban inundations?. Journal of Flood Risk Management, 6: 124–134. doi: 10.1111/j.1753-318X.2012.01166.x
- Issue published online: 16 MAY 2013
- Article first published online: 24 OCT 2012
- Accepted manuscript online: 7 SEP 2012 06:45AM EST
- French National Research Agency. Grant Number: ANR-07-VULN-01
- Flood regime;
This paper presents a study that aims to evaluate the impact of periurban development on the flood regime of a small river crossing a densely urbanised area, the city of Lyon (France). This research was conducted on the catchment of the Yzeron River in western Lyon. Statistical tests showed that both flood frequency and severity have increased in this catchment, between two distinct periods: the 1970s and the 1990s. Evaluation of the specific impact of urban development on the flood regimes requires the paying of attention to all possible contributing factors. For that purpose, we used a diachronic approach, with hydrologic and land-use data from the two periods. We used these data to calibrate a distributed hydrologic model and then to simulate the urban, periurban, and rural hydrologic contributions in the past but also in the future. We also compare the floodable vulnerability amount with the flood hazard increase between the two periods to assess what components mainly affect the flood risk during this land-use evolution. Finally, the basin scale efficiency of a generalised on-site rainwater retention technique is evaluated to know how that technique could contribute to mitigate flood risk.