نوع مقاله : مقاله پژوهشی
نویسندگان
1 کارشناسی ارشد بیابانزدایی، گروه طبیعت، دانشکده کشاورزی و منابع طبیعی، دانشگاه اردکان، اردکان، ایران.
2 استادیار، گروه مهندسی طبیعت، دانشکده کشاورزی و منابع طبیعی، دانشگاه اردکان، اردکان ، ایران.
3 دانشیار، گروه مهندسی طبیعت، دانشکده کشاورزی و منابع طبیعی، دانشگاه اردکان، اردکان، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Desertification due to urban or technological development is due to human intervention and land use change, which is a serious problem. In addition to accelerating land degradation, population growth is leading to misuse of land. In the present study, using Landsat4-5 satellite imagery of 1986 TM sensor and Landsat 8 satellite imagery of OLI TIRS sensor of 2017, the trend of land use changes in Tabas city was investigated. The study area was divided into 6 units and using the Iranian Model of Desertification Potential Assessment (IMDPA), standard technogenic criteria and indicators were studied, and finally the numerical value of standard indicators of urban and industrial development (ratio of man-made to agricultural and garden lands, ratio of man-made lands to garden) And forest or green space, per capita green space index, percentage of road construction areas and road density, ratio of potential population to actual population) were calculated for the whole region in both time periods. Studies have shown that during the studied years, the level of man-made complicaions has increased by 5.68 percent, while arable lands have also increased by about 5.9 percent. The results showed that in the study area, the ratio of man-made land ratio, to garden and forest or green space and green space index with numerical values of 0.92 and 9.14, respectively, had the greatest impact in 1986 and man-made land ratio. To agricultural and horticultural construction and road density index with a numerical value of 0.79 and 1.95, respectively, in 2017 have the least impact on the technogenic desertification of the region. Based on the five indicators studied, the quantitative value of desertification intensity for the whole region in 1986 was 1.89, which is in the middle class of desertification, and in 2017, 7.13, which is in the very severe class of desertification.
کلیدواژهها [English]