| Abstrakt: |
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. El-Bayadh city is among several cities in the region that have experienced multiple destructive floods. This paper focuses on the October 1, 2011 event in El Bayadh. The event was numerically replicated through hydrological and hydraulic modeling using HEC-HMS and HEC-RAS software. The modeling process included the influence of key structures such as protective walls, channels, and buildings, which are commonly neglected in similar flood modeling studies. This enhanced model incorporates real-world complexities, leading to a more accurate representation of the flood scenario. Utilizing the calibrated model, the performance and capacity of the channel and protective structures in safeguarding the city's nearest buildings were assessed. The analysis demonstrated that the October 1, 2011 occurrence, 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. [ABSTRACT FROM AUTHOR] |
