Greenhouses play an important role in the field of agriculture, allowing the grower to have more control on the environmental factors that govern the behaviour of crops. The interactions of the environmental factors on the inside climate of a greenhouse are complex and involve a set of physical mechanisms that constitute challenges to modellers. To better assess the greenhouse climatic behaviour, a CFD modelling approach was developed and combined with field surveys considering a Venlo, closed greenhouse, under semi arid conditions. Measurements were undertaken at different heights along a vertical cross-section at the centre of the greenhouse. The components of the greenhouse were then integrated inside a CFD distributed climate model. The boundary conditions were inferred from the outside climatic conditions, taking account both of radiative and convective transfers through the walls. Simulations were conducted under pseudo-steady state conditions (i.e., updating the boundary conditions at each time step) all day long, and several scenarios (clear or cloudy day) were simulated to analyse to what extent the inside climate of the green¬house responds to the outside climate conditions.

Bougaa region is affected by a shift moving a considerable amount of detritus formed by colluvial deposits, scree to boulders and scree slope reddish clay loam resting on a substratum of impermeable shale shale. This shift is shaped in geological formations particularly sensitive to this type of movement because of the heterogeneity of their facies, the impermeability of certain layers and the effect of tectonics and karstification. The purpose of this study is to characterize these shifts using tools geological, geotechnical and geomorphological features. The role of seepage is essential in triggering these shifts where lithology, structural arrangement, the climate is favorable factors. The presence of slopes> 20%, emerging sources of karst reservoir Guergour, creating wetlands that allow triggering of ground motion in this region.