Investigation of human population pressure on environment Case study: Masile basin of Kashan

Irregular increasing of population and increasingly needs to food and new resources of energy have been caused unprincipled impermanent utilization of natural resources. A phenomenon their bad conclusion in dry and semi-dry ecosystems is more widespread and irreparable due to its sensitivity and vulnerability. A method to evaluate desertification potential risk has been prepared by FAO/UNEP which considered the natural factors and human activities such as population pressure and grazing intensity. Hence, in this study the desertification severity was determined by the FAO/UNEP method, in addition to population variations from 1956 to 2006 in Kashan basin which is one of the sub basins of salt lake of center of Iran.