Since urbanization is an inevitable process, we can direct urban growth in the most suitable direction by land use planning so it can provide dwellers requirements and also maintain natural resources, suburbans and agricultural areas. Also the impervious surface has been used as an indicator of urbanization. This surfaces effect on urban ecology such as : urban heat island affect, restrictions on water purification and infiltration in soil, increased pollution runoff and increased erosion in the downstream watershed In recent years, remote sensing data and geographic information system (GIS) have been widely applied in identifying and analyzing land use and land cover and impervious surface change. Accurate change detection of earth’s surfaces provides better understanding of relationships and interactions between human and natural phenomena for prefect resource management. There are a lot of methods for land cover change detection such as image rationing, image difference, change vectore analysis, image regression, composite analysis and post- Key words Impervious surfaces, Image
