Contribution to flood risk management by the IRIP method at the level of Gareat El Taref catchment, Constantine’s highlands, North-East of Algeria

Abstract

AbstractThe term flooding is often associated with a stream overflow or a marine flood, runoff-floods is rarely considered, and today suffers from a lack of knowledge and control of the phenomenon. This paper, presents a geographic information system iRIP@ – Flooding by Intense Pluvial Runoff (French acronym), which is a new tool to mapping flooding by runoff as a tool for decision-making by mapping runoff flooding in Gareat El Taref catchment (Northeast Algeria), with identifying the area of production, transfer and accumulation of flood.Us results, we have cards represent the potential of a territory to generate the various hydraulic dynamics of runoff: the runoff production card, the runoff transfer, the runoff accumulation card, the runoff-flooding card.A visual simulation on the flood risk card indicates that the areas with an important runoff flood risk are the communes of Khenchela Oum El Bouaghi Ain El Beida and F’kirina. Moreover, the roads that join Khenchela with Ain El Beida and with Oum El Bouaghi.Khenchela city is exposed to a great risk of flooding by runoff, the solution proposed by the authorities and that summarizes by the construction of a canal is not sufficient, because on the one hand the north of the city remains exposed to this risk. On the other hand, a large area of runoff production is located between the canal and the city.It is probably operating to encourage farmers to introduce certain agricultural practices that are part of a sustainable management of flood risk by runoff.