The day after the independence, Algeria has faced the problems of underdevelopment and consequently the choice of model economic and social development. Through the exceptional resources hydrocarbons, the country has opted for a basic industry in which the petrochemistry and steel industries are the backbone. This work is in the field of research on the link between architecture, urban and industrial risks. Where we will discuss the report and the link between urban forms, architectural ones and urban industrial risks. The city of Skikda is our case of study with the implantation of petrochemical pole that has been done next to the city, at a time when the concept of industrial risks does not exist and where urbanization is carried out under conditions that do not take into account the impact of the petrochemical industry on humans and the environment. In fact, the impact of urban forms on insecurity is high. Shape influences security issues and industrial risks, not only by how it takes. However, it also determines the options.

This study tries to identify the behaviour of the city in the case of industrial risks; mainly the relationship between urban form, spatial configuration, and industrial risk.Industry has long been seen as a vehicle for developing and enriching

Natural risks are historically present in the Mediterranean: earthquakes, eruptions, floods ... That is why governments and people expect prevention devices and alert which require for their development, basic research are applied. The context of life in Algeria, especially in urban areas is marked by insufficient control of housing and pollution problems. The risk of natural disasters remains generally high and the dense concentration of people and activities in coastal areas helps to strengthen risk factors The article, founded on the town of Ghardaïa, tries a more complete approach, which includes the near total of the challenges present on this area, it proposes a method of Evaluation and prevention against the risk of flooding since that the precaution is one of the principles of sustainable development; the vulnerability of urban areas is the main target of the study.