Publications - Urban expansion-flood damage nexus: Evidence from the Dosso Region, Niger

Maurizio Tiepolo, Andrea Galligari, DIST-Politecnico and University of Turin, Italy Published in: Land Use Policy, 108 (2021), Elsevier Abstract The current literature links flood exposure and the consequent damage in the sub-Saharan Africa to urban expansion. The main implication of this pertains to the fact that cities are the target of flood risk reduction. However, our knowledge of the built-up area expansion–flood damage nexus is still too scarce to support any risk reduction policy at the local scale. The objective of this study is to reconsider the link between urban expansion and flood damage widening the observation to rural settlements with open access information alternative to global datasets on flood damages and moderate resolution satellite images. Using very high-resolution satellite images accessible via Google Earth Pro, the expansion of 122 flooded settlements in the Dosso region (Niger) during the past 20 years is evaluated. Spatial dynamics is then compared with the rate of collapsed houses due to flooding. Finally, house collapses and retrofitting are compared. We discovered that cities expand at faster rates and with an opposite trend to that reported by the global datasets. However, hamlets and villages expand even more rapidly and suffer more house collapses than rural towns and cities. House consolidation is quicker than the settlement expansion but this is not sufficient to reduce damage from pluvial flooding. The proportion of the Poor to the total number of inhabitants in rural settlements is three times higher than that in urban settlements. Environmental justice is, therefore, not just an urban issue but a rural urgency.

שדה	ערך
עדכון הנתונים האחרון	22 ביוני 2021
עדכון אחרון של נתוני העל	22 ביוני 2021
מועד היצירה	22 ביוני 2021
תצורה	PDF
רישיון	Creative Commons Attribution
Datastore active	False
Has views	False
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Package id	c5af00bc-9e72-42f2-bd13-5f0296fbc05a
Position	9
State	active

Urban expansion-flood damage nexus: Evidence...

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