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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Flood risk management and adaptation : Development of flood damage curves for cotonou city, benin
Development of flood damage curves for cotonou city, benin
Author : BLANDINE OUIKOTAN(1), BERRY GERSONIUS(2) & HANS VAN DER KWAST(3)
1. INTRODUCTION
In West Africa, flooding is becoming more serious since a while, in terms of the number and frequency of floods occurring
as well as the damage and the deaths it causes. During the last decade, more than 100 disasters flooding events were
recorded and about 1,200 persons were killed (EM-DAT,2013). In 2009, 16 among the 17 West African countries were
stroke by floods and 600,000 people were affected. Senegal was among the most affected countries (Di Baldassarre et
al., 2010) and the cost of damage was estimated to US$ 42.32 Million for the whole country and US$ 35.43 Mi for Dakar,
the capital city (Faye, 2011). In 2010, 15 West African countries were hit by damaging floods (EM-DAT, 2013) and cities
like Cotonou, Lome, Accra, Lagos, Dakar have registered the greatest number of affected people
(Gouvernement.Republique.du.Benin, 2011) . For Benin, the 2010 events seemed to be Benin¡¯s worst flood which had
overwhelmed two-third of the country. 9.3% of the total population was affected (EM-DAT, 2013) and the country was
among the top ten countries in the world affected by floods according to the Centre for Research in Epidemiology
Disasters. Significant damages were recorded with massive losses of human lifes, houses, harvests, animals and
properties especially in Cotonou, the most urbanized city and the economic capital of Benin where 9325 people were
displaced and 3108 homeless.
Cotonou is located in the southern part of Benin at latitude 6¡ă21' N and longitude 2¡ă23' E. It has a surface area of 79 km2
and shelters most of the administrative buildings, companies' headquarters, an international market covering 18 hectares,
the single airport and the harbour of the country, the two-thirds of Benin industries and carries out 98% of the volume of
imports of Benin (GAI, 2006).
Like most of the coastal cities in West Africa, Cotonou, has been facing floods each year. The ongoing urban development
in flood-prone areas, the parcelling of wetlands zones and the lack of long term planning of prevention measures are
increasing the risk of flooding. To date, there are no proper tools for flood risk assessment to support the choice of
mitigation and adaptation measures. This paper tries to fill this gap by developing flood damage curves for Cotonou city.
Flood damage curves are essential tool for flood risk assessment to support the choice of mitigation and adaptation
measures. Damage functions are essential and represent the standard approach for flood damage assessment
(Prettenthaler et al., 2010
File Size : 169,594 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Flood risk management and adaptation
Date Published : 18/08/2015
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