Browsing by Author "Tarek DAIFALLAH"

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    Assessment of groundwater salinity and risk of soil degradation in Quaternary aquifer system. Example: Annaba plain, Algeria N-E
    (JOURNAL OF WATER AND LAND DEVELOPMENT, 2018) Tarek DAIFALLAH; Samia HALIMI
    Abstract Quality of water resources in Annaba plain (North East) of Algeria is facing a serious challenge due to industrialisation and excessive exploitation of water. Therefore, 29 groundwater samples were collected from this area to assess their hydrogeochemistry and suitability for irrigation purposes. The groundwater samples were analysed for distribution of chemical elements Ca2+, Mg2+, Na+, K+, HCO3 −, Cl−, and SO4 2−. It also includes pH, electrical conductivity. The hydrochimical study has shown that the facieses are changing between a pole calcium-chloride-sulphate and sodium-chloride types. The results also showed that the salinity is the major problem with water for irrigation use (58% of samples fall into C3S1 class). As a result, the quality of the groundwater is not suitable for sustainable crop production and soil health without appropriate remediation.
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    Prédétermination des débits de crue par différentes méthodes. Cas du bassin versant d’El Kébir Ouest à Ain-Charchar (Nord-Est algérien)
    (Synthèse: Revue des Sciences et de la Technologie, 2017-01-29) Tarek DAIFALLAH
    Abstract To combat flooding, a long series of flow measurement is necessary, which is not the case unfortunately in most of the time.The interruption of the hydrometric station of Ain Charchar controlling the watershed of Oued El Kebir West Ain-Charchar on an area of 1130 km2 poses a serious data problem. To overcome this handicap, we used the values of maximum flows recorded over a period of 14 years, from 1985 to 1999, which fit well to the law of Gumbel. From the adjustment line, the probable flood values for different return periods were determined, 200 m3 / s for a return period of 10 years and 300 m3 / s for T equal to 100 years.To achieve our second objective, which is the possibility of reconstructing flood flows using empirical formulas based on precipitation, it has verified the correlation rain-flow rate by the Hydrolab software and the GR 1 model. The two methods have shown the existence of a simple linear relationship with correlation coefficients of 0.82 and 0.69, respectively. The two formulas for determining flood flows (formula of Turazza and that of Skolvoski) have led to similar results to those measured in the gauging station.
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    Water resources and their management under impact of climate change and users pressures in Kebir-West River basin (North-Eastern Algeria), using the WEAP model
    (researchgate, 2017) Tarek DAIFALLAH; Halimi Samia
    Abstract Water is the factor of the humanity development, this resource of life threatened by human pressure and the effects of the nature to know the future climate change put the man in face of challenges for a rational management. The objective of this paper is to examine the likely impacts of a climate change on the water supply and demand and the resulting socioeconomic implications in the watershed of El Kebir West located in the northeast of Algeria under different scenarios applying the WEAP model. or an optimistic scenario of reference, the water resources of the basin could perfectly cover the requirements of different users. To that taking into account the impacts of climate change on these reserves, and the augment in the demand induced by the increase of populations and their activities, the region will suffer from water stress from the Horizon 2030, when demand exceeds 80 MCM of water and reach more than 136 MCM in 2050. Whereas, the supply will decrease from 70.8 actually to 66 MCM (million cubic meter) in 2050. This could be caused by a possible decrease in the storage of water. This stress could be avoided if we decide to a policy for the demand management, or may establish a state of balance of supply and demand by various tools of water management.