Water consumption has increased significantly around the world in recent years, whereas existing water resources are becoming rarer. Even in tropical areas, where the rains offer an average of 2600 mm of water yearly, the soil water source can reduce gradually throughout the dry season and limit the growth of vegetation. Different irrigation methods have been developed to meet plants’ water needs for productivity. These methods depend closely on mobilization of the water source and its permanent control. In this paper, we have proposed an autonomous water and nutritional anti‐stress device for plants based on the recovery of rainwater. It is a new concept inspired by irrigation in antique clay pots. It is designed to ensure regular cyclical storage and transfer to the plant of an almost constant daily flow of mobilized rainwater. These waters are also enriched with nutrients during their journey to the plant. This delayed water storage and transfer process will compensate for the lack of water necessary for the survival of the plant in dry periods. The device was tested in a reduced environment and has given good results in decreasing water stress and increasing the level of nutrition for plants.

Great efforts were deployed by researchers to mobilize water resources while is becoming rarer and to control with efficiency the water besides nutrient needs for the plant. Autonomous water and nutritional anti-stress device for plants (AWANASD) based on the recovery of rainwater patented by Medhioub et al. fits into this general framework. Scientific efforts were also dedicated to preserve the environment and minimize energy consumption through using agricultural waste materials in different fields. This chapter provides a new concept based on the use of the olive solid waste in AWANASD as water storage and nutrient elements for plants giving rise to the new system called AWANASD-OSW.

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The coastline of Hammamlif is an area characterized by a flooding problem due to the heavy rain and the wave run up phenomenon. This flooding phenomenon is made worse by both an intense urbanization and the badly designed unitary-type sewerage networks which drain rain water and waste water at the same time. These networks, now silted and overburdened, are not able to carry off water. Hammamlif wave is characterized by a run up in the order of 2.50 m (Doctoral thesis, Abir Baklouti). This value causes a major problem for the low zone of the area. The suggested solutions according to our study are to strengthen the drainage networks and even the construction of a new water purification station and the removal of the existing breakwaters because they are badly designed. Instead, we should apply an artificialy recharged beach and the solution of a submerged geotextile artificial reef to fight against wave action in the area. Applying these major solutions requires a geotechnical study of the Hammamlif area which is the subject matter of this paper. This article aims to present the geotechnical study of the site to come out with specific recommendations on the reserved land to be used as support for future studies and provide various foundation designs for different structures planned in the Hammamlif area.

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