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

One of the main causes of land degradation or desertification is pressure of human population onnatural environment for resolve of economic and social problems in short term. For this reason, in thisresearch, human population and its pressure on environment was studied. The base of research methodwas national project by title" Investigation and mapping of desertification in the Namak lake byrepaired method of FAO & UNEP ". In this method one of the factors affecting land degradation ishuman population pressure on environment that its quality and quantity was studied in sub basin ofQazvin Masile. For study the trend of population of Masile in 1956 and 2006 years (Oldest and newestpopulation data) in the 50 years period were collected and analyzed. Results shows increase area ofsever desertification class and decrease area of low desertification class. Continuing changes in thehuman population can make increase area of very sever desertification degree. Using the results,managers and planners can have appropriate assesment of the population pressure on the environmentand for Sustainable development, they can alter environmental management specially management ofquality and quantity of water resources.