LARHYSS Journal
Volume 21, Numéro 1, Pages 7-28
2024-09-15
Evaluating The Effectiveness Of The Existing Flood Risk Protection Measures Along Wadi Deffa In El-bayadh City
Authors : Ben Said Mosbah .
Abstract
The main cause of flooding in Algeria often arises from water overflowing from the wadis into nearby urban areas. This situation can become even more critical in the arid regions of Algeria, where a prolonged lack of rainfall has been noticeable in recent decades. This has led to decreased flow in these wadis and, consequently, an increase in human activities encroaching upon the dry areas near the wadis. As a result, this has given rise to exceptionally severe catastrophic events. This paper focuses on El Bayadh city, which is among several cities in the region that have experienced multiple destructive floods, including events in 1991, 1993, 1997, 2004, 2008, 2011, and 2023. However, the most catastrophic flood in El Bayadh city occurred on October 1st, 2011, resulting in the tragic loss of 13 lives and significant material damage. This particular event was numerically reproduced, including hydrological and hydraulic modeling, and subsequently calibrated using observed data. The aim was to assess the performance and capacity of the channel and protective structures in safeguarding the city's nearest buildings. It was demonstrated that the occurrence on October 1, 2011, with a peak discharge of 425 m3/s, greatly exceeded the channel's capacity, which can only handle a peak discharge of 180 m3/s.
Keywords
flood risk ; arid regions ; flood control ; hydraulic modeling
Les articles similaires
بوسالم أحلام
.
عابد يوسف
.
ص 117-132.
Yahia Zeghoudi
.
pages 74-88.
Hachemi Ali
.
Hafnaoui Mohammed Amin
.
Madi Mohammed
.
pages 50-57.
Said Houari Amel
.
pages 257-268.
