Volume 10 Article informations Determination of the physical and hydrodynamic parameters of the Degueche Oasis soil (Southern Tunisia): approach to precision and quality Sana Mustapha , Latifa Dhaouadi, , Nissaf Karbout , Houda Besser , Mohamed Wahba , Abdessatar Hatira a Abstract Land degradation and progressive loss of agricultural soil fertility are two dynamic challenges threatening the sustainability of agricultural production, and the economic security of agro-based countries. Hence, a fruitful investment in irrigated lands relies on a critical assessment of soil proprieties and hydrodynamic function, and their relative impacts on soil water dynamics. In this context, the present study investigates the spatial distribution of these parameters and their likely consequences on the oases agro-systems of Menchia Oasis parcels (SW Tunisia) given their socio-economic and environmental relevance to the region. In this study, this oasis was divided in twelve plots according to Sectoral Center for Agricultural Vocational Training in palm date culture. The granulometric analysis indicates that sandy fraction that represents about 60% of the analyzed samples. The soils have different physio-chemical proprieties with alkaline pH with a means of 7.5±0.2 and a moderate salinity with a means of 2.5±0.2 g.l-1 and variable hydraulic characteristics according to the obtained results from the application of MUNTZ method. The findings coupled with field investigations indicate that the productivity of these agro-systems is closely related to irrigation water quality and soil proprieties on the one hand and on the dynamic balance soil-water regulated by the appropriate irrigation and drainage techniques on the other hand. Modeling of the evolution of these proprieties are crucial for the prediction of drought and desertification phenomena in Saharan Oases. Key words: Double ring, Infiltration, Hydrodynamics, Oasis soil, Physical properties. Tozeur-Tunisia.