The development of an oasis basin is an important component for its sustainable management. The aim of this study is to understand the contribution of oasis basin management to improving the resilience of farmers while guaranteeing sustainable exploitation of the managed basin. The methodology used consisted of comparing a developed site with an undeveloped site by means of an assessment of the herbaceous vegetation, an inventory of achievements and socio-economic surveys. The results show that the developed site has 2.5 times richer in flora than the undeveloped site. This flora is dominated by Poaceae with 58.33% of the 12 families and 42.86% of the 5 families encountered on the developed and undeveloped sites respectively. The herbaceous cover was 87.75% and 16.56%, on the developed site and the control site respectively. On average, a farmer cultivates 0.37 ha in the developed basin, where the agro-biodiversity is made up of 21 species, compared with 0.6 ha in the undeveloped basin with an agro-biodiversity of 9 species. This type of farming generates a positive profit margin of around €1,145.59 and €501.99, on average per farmer, in the developed and undeveloped basins respectively. 100% of the farmers thought that the main effect of the development outside the basin was to reduce erosion, while over 98% thought that it improved farm income inside the basin. The development of a basin is a guarantee of its sustainable exploitation.