| چکیده انگلیسی مقاله |
Background and purpose: One of the damages inflicted on natural resources is land use change. This issue is present throughout all regions of Iran with varying degrees of intensity and severity, often referred to by various titles such as land degradation, deforestation, and more. According to Iran's Forest and Range Nationalization Law in 1963, all forests, Rang, meadows, and woodlands are recognized as public property with some exceptions; which, at times, has been subject to encroachment by individuals, whether real or legal entities, including government or private entities. This situation of land ownership has been confronted. Some challenges such as illegal-possessions and land use changes. This kind of Land use change or illegal passions is sometimes labeled as “land grabbing”. In this research, the objective is to monitor land use changes with a focus on two land uses, reclamation and non-reclamation, as stipulated by the second law supporting natural resources, within Padena region in IRAN in recent years. The recent land use changes will be compared with the maps prepared according to the nationalization law.
Methods: The studied area is a part of the watershed of the Marber river, called Padnai-Olia, with an area of 54674 hectares in the southeast of Isfahan province. An examination of temporal changes was conducted over a period of 58 years spanning from 1955 to 2013 to assess the variations. Maps obtained from aerial photos and satellite images were analyzed using geographic information systems and remote sensing. Satellite images related to 2013 were obtained from Google Earth, and aerial photographs in different scales (1:20000, 1:50000, 1:40000), and required maps were prepared from the Armed Forces Geographical Organization and Iran National Cartographic Center. Cross-tab analysis is used to compare the maps of different periods. In this regard, three land use maps corresponding to the current time and land use maps for a minimum of 15 and 51 years ago were prepared at a scale of 1: 25,000. On the other hand, law enforcement maps, indicating reclamation and non-reclamation lands, were also obtained from the regional office of natural resources. The land use map for law enforcement, drawn based on 1: 50,000 maps from the National Mapping Organization in 1973, serves as the basis for delineating national lands and exceptions in the implementation of natural resources and watershed management laws.
Results: The obtained results indicate that approximately 12.7% of non-reclamation (rangeland) areas in the Padena region have undergone land use changes. The highest rate of land use change occurred in the time intervals of 1955-1969 and 1999-2013, respectively. The total area of rehabilitated lands in 1955 was 2095 hectares, accounting for 8.3% of the total area of the region. This area was increased to 6390 hectares (11.7%), 6595 hectares (12.1%), and 8776 hectares (16.0%) in 1965, 1999, and 2013, respectively.
Conclusions: The area of rehabilitated zones in the current regulatory maps (6259 hectares) exhibits a significant difference compared to the 1:50,000 topographic maps of the Survey Organization in 1973 (3358 hectares) and the maps derived from 1334 aerial photographs in this study (2059 hectares). Therefore, it is necessary to obtain accurate land use maps in this region. |
| کلیدواژههای انگلیسی مقاله |
Remote sensing, National Lands, Land-use Change, Geographic Information System, Padena, Google Earth |