Erosion and Desertification: Environmental implications and Strategies of Research. The erosion and desertification are phenomenons bound to some specificies dry climatics conditions begotten in the geosistems for improper human activities. The are expressed by degradation of the soil, vegetation and water, unrecoverable in many cases, and apparition of new environment with new dynamics. Moreover, the commit of biological potential and the sustainable development. The research of these ecological and socio-economics processes, since it is considered a break of the man-environmental balance, is necessary for power to supply, to the Publics Administrations and threatened populations, effective tools of prevention and mitigation, and to contribute to the design, development and applications of action plans of struggle against the erosion and desertification.