نوع مقاله : علمی - پژوهشی
نویسندگان
1 گروه جغرافیا و برنامه ریزی شهری، دانشکده ادبیات و علوم انسانی، دانشگاه پیام نور، تهران، ایران
2 گروه سنجش از دور، دانشکده ادبیات و علوم انسانی، دانشگاه محقق اردبیلی، اردبیل، ایران
3 گروه جغرافیا و برنامه ریزی روستایی، دانشکده ادبیات و علوم انسانی، دانشگاه گلستان، گلستان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Zoning investigation of vegetation and changes in specific time intervals are important for reducing environmental damage. The main part of the incremental changes in Khoushab area is due to the lack of job opportunities in the region to absorb the workforce surplus and poverty of the residents, whose pressure on grassland areas has reached its highest level through traditional livestock farming and resulted in a reduction in the level of grassland. As the environmental changes reflect the land management status, change monitoring methods can help assess this status.In this regard, the purpose of this study is to detect vegetation changes in Khoushb region of Khorasan Razavi province during the period 2005-2015 using the remote sensing (RS) and Geographic Information Systems (GIS) techniques. To investigate and analyze changes, the decision tree classification method was performed according to the standards provided by NASA, which was first defined for each set of 16 values of a class. Accordingly, it was determined that the threshold of changes was 1 deviation above the average in the region under study.After determining the threshold of change, areas with decreasing, incremental changes and unchanged areas have been determined. After acquiring land facts through field observations and satellite imagery from Google Earth, to assess the accuracy of change-assessment techniques, total accuracy and Kappa coefficient were used. According to the obtained results, it was determined that the evaluated data has a total accuracy of 91 and Kappa coefficient of 0.88 in assessing the regional vegetation changes.
کلیدواژهها [English]