The study of the Causes of Informal settlement Formation (Case Study: Zaynabee koye neighborhood Pakdasht Township)

With the occurring of the Industrial Revolution in Europe, the world's population, especially in the cities, has grown steadily, as in 1804, the world's population reached a billion people for the first time. The population increase in urban areas originally appeared in European and developed countries, with the population of urban population of Europe and the United States increasing by about 200 years, from 1750 to 1950, but this increase was made at a reasonable pace. Which has reached about one billion people for about 200 years. But since 1950, the population has entered a new stage and it has entered the world of developing countries. In contrast to the previous period, this stage was accompanied by a rapid increase in urban population, with urban populations reaching more than two billion people, and it is anticipated that this increase will continue until 2030. This increase in its population has led to problems especially for urban executives, including: pollution, increasing the crime, rising unemployment, especially among young people, housing shortage, deprivation, informal settlements, etc. Today, one of the most important challenges Urban managers is Informal accommodation, as we see in many parts of the world. In Iran, we have witnessed the formation of this phenomenon since the 1940s, but this phenomenon began to grow in the 1970s